{
 "triggers": [
  {
   "slug": "glp-1-medications",
   "name": "GLP-1 medications",
   "category": "Medications",
   "aliases": [
    "Ozempic",
    "Wegovy",
    "semaglutide",
    "weight-loss injections"
   ],
   "url": "https://hairexperts.org/triggers/glp-1-medications/",
   "quotable": "Hair loss is listed in the Wegovy (semaglutide 2.4 mg) prescribing information in about 3% of adults versus 1% on placebo, and the label says these reports were associated with weight reduction; weight loss is a recognised trigger of telogen effluvium, which typically shows a few months after the trigger.",
   "clock": {
    "anchor": "the date rapid weight loss began",
    "onset": [
     8,
     16
    ],
    "peak": null,
    "settled": [
     26,
     39
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Trigger",
     "window": "Rapid weight loss",
     "note": "AAD lists losing 20 pounds or more as a common trigger of excessive shedding (telogen effluvium).",
     "source": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "stage": "Onset",
     "window": "Commonly about 2–4 months later",
     "note": "DermNet describes increased hair fall noticed 2 to 4 months after a triggering event.",
     "source": "https://dermnetnz.org/topics/telogen-effluvium"
    },
    {
     "stage": "Settling",
     "window": "Typically over 6–9 months",
     "note": "Shedding commonly tapers back to normal over 6–9 months in most cases, if the trigger is no longer active.",
     "source": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ],
   "warning": [
    "Patches or bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Shedding continuing well beyond about 9 months",
    "Feeling generally unwell, very tired, or unable to eat enough"
   ],
   "sources": [
    {
     "title": "WEGOVY (semaglutide) prescribing information — Adverse reactions: Hair loss",
     "publisher": "U.S. FDA / DailyMed",
     "url": "https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ee06186f-2aa3-4990-a760-757579d8f77b"
    },
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ]
  },
  {
   "slug": "postpartum",
   "name": "Postpartum",
   "category": "Life events",
   "aliases": [
    "after pregnancy",
    "after having a baby",
    "postnatal shedding"
   ],
   "url": "https://hairexperts.org/triggers/postpartum/",
   "quotable": "Postpartum shedding is commonly noticed about two months after giving birth, usually peaks around four months, and is normal and temporary, with hair tending to regain its fullness within six to nine months.",
   "clock": {
    "anchor": "the birth date",
    "onset": [
     8,
     10
    ],
    "peak": [
     16,
     18
    ],
    "settled": [
     26,
     39
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Birth",
     "window": "Week 0",
     "note": "Hormonal and physical changes after delivery.",
     "source": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "stage": "Onset",
     "window": "About 2 months after birth",
     "note": "AAD: a new mom can see excessive hair shedding about two months after giving birth.",
     "source": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "stage": "Peak",
     "window": "Around 4 months after birth",
     "note": "AAD: the shedding usually peaks about four months after giving birth.",
     "source": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "stage": "Recovery",
     "window": "Within 6–9 months",
     "note": "AAD: as the body readjusts, hair tends to regain its normal fullness within six to nine months.",
     "source": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    }
   ],
   "warning": [
    "Patches or bald spots",
    "Scalp pain, redness or scaling",
    "Shedding still heavy well beyond nine months",
    "Ongoing exhaustion, feeling cold, or low mood — speak to your doctor",
    "A widening part that persists after shedding stops"
   ],
   "sources": [
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ]
  },
  {
   "slug": "after-surgery-anesthesia",
   "name": "After surgery & anaesthesia",
   "category": "Procedures",
   "aliases": [
    "after an operation",
    "post-operative hair loss",
    "general anaesthetic"
   ],
   "url": "https://hairexperts.org/triggers/after-surgery-anesthesia/",
   "quotable": "Hair shedding after an operation is usually telogen effluvium, which is typically noticed 2 to 4 months after the surgery and commonly tapers back to normal over 6 to 9 months.",
   "clock": {
    "anchor": "the surgery date",
    "onset": [
     8,
     16
    ],
    "peak": null,
    "settled": [
     26,
     39
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Surgery",
     "window": "Week 0",
     "note": "AAD and DermNet both list undergoing an operation as a common trigger.",
     "source": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "stage": "Onset",
     "window": "Commonly 2–4 months later",
     "note": "Increased hair fall is noticed 2 to 4 months after the triggering event.",
     "source": "https://dermnetnz.org/topics/telogen-effluvium"
    },
    {
     "stage": "Peak",
     "window": "After several months",
     "note": "DermNet: hair fall is profuse at first, then a peak is reached after several months.",
     "source": "https://dermnetnz.org/topics/telogen-effluvium"
    },
    {
     "stage": "Recovery",
     "window": "Over 6–9 months",
     "note": "Hair fall gradually tapers back to normal over 6–9 months in most cases.",
     "source": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ],
   "warning": [
    "Patches or bald spots",
    "Scalp pain, redness or scaling",
    "Hair loss localised to one area",
    "Shedding beyond about 9 months",
    "New medications started around surgery that you are unsure about — ask your doctor"
   ],
   "sources": [
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ]
  },
  {
   "slug": "starting-minoxidil",
   "name": "Starting minoxidil",
   "category": "Starting/stopping treatments",
   "aliases": [
    "dread shed",
    "minoxidil shedding",
    "Rogaine",
    "Regaine"
   ],
   "url": "https://hairexperts.org/triggers/starting-minoxidil/",
   "quotable": "A temporary increase in shedding is commonly reported in the first weeks of minoxidil — the so-called 'dread shed' — and in one 2025 study of topical minoxidil it peaked around week 4 and was below baseline by week 16.",
   "clock": {
    "anchor": "the date you started minoxidil",
    "onset": [
     1,
     8
    ],
    "peak": [
     4,
     4
    ],
    "settled": [
     8,
     16
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Start",
     "window": "Week 0",
     "note": "Minoxidil shortens the resting (telogen) phase, releasing resting hairs early.",
     "source": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8719956/"
    },
    {
     "stage": "Onset",
     "window": "Within 1–8 weeks",
     "note": "Reported within a week of starting (review) and during the first 2–8 weeks in some studies.",
     "source": "https://jddonline.com/articles/hair-loss-myths-S1545961617P0690X/"
    },
    {
     "stage": "Peak",
     "window": "Around week 4 (topical)",
     "note": "In a retrospective study of 49 patients, shedding was significantly increased at week 4.",
     "source": "https://doi.org/10.1080/09546634.2025.2480739"
    },
    {
     "stage": "Settling",
     "window": "Commonly 8–16 weeks",
     "note": "A review says it usually settles in 8–10 weeks; in the 2025 study shedding was below baseline by week 16 (longer with 2% than 5%).",
     "source": "https://doi.org/10.1080/09546634.2025.2480739"
    }
   ],
   "warning": [
    "Patches or bald spots",
    "Scalp irritation, redness or itching",
    "Dizziness, palpitations, chest pain or swelling — contact your prescriber promptly",
    "Shedding still increasing after 4 months"
   ],
   "sources": [
    {
     "title": "Pharmacological Management of Pattern Hair Loss",
     "publisher": "Indian Journal of Plastic Surgery (PMC8719956)",
     "url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8719956/"
    },
    {
     "title": "Hair Loss Myths",
     "publisher": "Journal of Drugs in Dermatology",
     "url": "https://jddonline.com/articles/hair-loss-myths-S1545961617P0690X/"
    },
    {
     "title": "Whether the transient hair shedding phase exists after minoxidil treatment… (retrospective study, n=49)",
     "publisher": "Journal of Dermatological Treatment, 2025",
     "url": "https://doi.org/10.1080/09546634.2025.2480739"
    },
    {
     "title": "Combating “dread shed”: overlapping topical and oral minoxidil during oral minoxidil initiation",
     "publisher": "JAAD International, 2024",
     "url": "https://www.jaadinternational.org/article/S2666-3287(24)00043-9/fulltext"
    }
   ]
  },
  {
   "slug": "stopping-finasteride",
   "name": "Stopping finasteride",
   "category": "Starting/stopping treatments",
   "aliases": [
    "Propecia",
    "coming off finasteride"
   ],
   "url": "https://hairexperts.org/triggers/stopping-finasteride/",
   "quotable": "According to the Propecia (finasteride 1 mg) FDA label, withdrawal of treatment leads to reversal of its effect within 12 months, so hair it was maintaining typically returns toward the untreated pattern gradually over that year.",
   "clock": {
    "anchor": "the date you stopped finasteride",
    "onset": null,
    "peak": null,
    "settled": [
     52,
     52
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Stop",
     "window": "Week 0",
     "note": "Any change should be agreed with your prescriber.",
     "source": "https://www.accessdata.fda.gov/drugsatfda_docs/label/2022/020788s030lbl.pdf"
    },
    {
     "stage": "Gradual change",
     "window": "Over the following months",
     "note": "The label does not describe when visible change begins.",
     "source": "https://www.accessdata.fda.gov/drugsatfda_docs/label/2022/020788s030lbl.pdf"
    },
    {
     "stage": "Reversed",
     "window": "Within 12 months",
     "note": "In the label's discontinuation group, the hair-count gain had reversed 12 months after switching to placebo.",
     "source": "https://www.accessdata.fda.gov/drugsatfda_docs/label/2022/020788s030lbl.pdf"
    }
   ],
   "warning": [
    "Sudden, heavy or patchy loss",
    "Scalp pain, redness or scaling",
    "Any new or persistent symptoms — report them to your prescriber"
   ],
   "sources": [
    {
     "title": "PROPECIA (finasteride 1 mg) prescribing information",
     "publisher": "U.S. FDA",
     "url": "https://www.accessdata.fda.gov/drugsatfda_docs/label/2022/020788s030lbl.pdf"
    }
   ]
  },
  {
   "slug": "mounjaro-zepbound-tirzepatide",
   "name": "Mounjaro & Zepbound (tirzepatide)",
   "category": "Medications",
   "aliases": [
    "Zepbound",
    "Mounjaro",
    "tirzepatide",
    "Zepbound hair loss month 3"
   ],
   "url": "https://hairexperts.org/triggers/mounjaro-zepbound-tirzepatide/",
   "quotable": "The Zepbound label lists hair loss in 4–5% of patients versus 1% on placebo, far more often in women (7.1%) than men (0.5%), and says it was associated with weight reduction; weight-loss shedding is typically noticed 2–4 months after the loss begins.",
   "clock": {
    "anchor": "the date steady weight loss began",
    "onset": [
     8,
     16
    ],
    "peak": null,
    "settled": [
     26,
     39
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Trigger",
     "window": "Weight loss",
     "note": "The Zepbound label says hair-loss reports were associated with weight reduction.",
     "source": "https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=487cd7e7-434c-4925-99fa-aa80b1cc776b"
    },
    {
     "stage": "Onset",
     "window": "Commonly 2–4 months after the loss begins",
     "note": "DermNet: increased hair fall is noticed 2 to 4 months after a triggering event — so month 3 sits squarely in the usual window.",
     "source": "https://dermnetnz.org/topics/telogen-effluvium"
    },
    {
     "stage": "Settling",
     "window": "Typically over 6–9 months",
     "note": "Shedding commonly tapers over 6–9 months once the trigger is no longer active.",
     "source": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Shedding still heavy well past about 9 months",
    "Feeling faint, very tired or unable to eat enough protein"
   ],
   "sources": [
    {
     "title": "ZEPBOUND (tirzepatide) prescribing information — Adverse reactions: Hair loss",
     "publisher": "U.S. FDA / DailyMed",
     "url": "https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=487cd7e7-434c-4925-99fa-aa80b1cc776b"
    },
    {
     "title": "WEGOVY (semaglutide) prescribing information — Adverse reactions: Hair loss",
     "publisher": "U.S. FDA / DailyMed",
     "url": "https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ee06186f-2aa3-4990-a760-757579d8f77b"
    },
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    },
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    }
   ]
  },
  {
   "slug": "gastric-sleeve-bariatric-surgery",
   "name": "Gastric sleeve & bariatric surgery",
   "category": "Procedures",
   "aliases": [
    "sleeve gastrectomy",
    "gastric bypass",
    "hair loss after gastric sleeve month 4"
   ],
   "url": "https://hairexperts.org/triggers/gastric-sleeve-bariatric-surgery/",
   "quotable": "In a study of 156 women after sleeve gastrectomy, 72% reported hair loss, 79% of them starting between the third and fourth month, lasting an average of 5.5 months, with no permanent hair loss seen.",
   "clock": {
    "anchor": "the surgery date",
    "onset": [
     13,
     17
    ],
    "peak": null,
    "settled": [
     37,
     39
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Onset",
     "window": "Months 3–4 after surgery",
     "note": "79% of affected patients reported hair loss starting between the third and fourth month.",
     "source": "https://doi.org/10.1089/lap.2020.0468"
    },
    {
     "stage": "Duration",
     "window": "About 5.5 months on average (±2.6)",
     "note": "Hair loss continued for an average of 5.5 ± 2.6 months; no permanent alopecia was observed.",
     "source": "https://doi.org/10.1089/lap.2020.0468"
    },
    {
     "stage": "Ending",
     "window": "Around 9 months in another cohort",
     "note": "One study recorded onset at 3.4 ± 1.4 months and end at 9.03 ± 3.6 months after surgery.",
     "source": "https://pmc.ncbi.nlm.nih.gov/articles/PMC10890033/"
    }
   ],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Shedding that starts or worsens after month 6",
    "Fatigue, pale skin or brittle nails, which can point to a nutritional deficiency"
   ],
   "sources": [
    {
     "title": "Hair Loss After Sleeve Gastrectomy and Effect of Biotin Supplements (n=156)",
     "publisher": "Journal of Laparoendoscopic & Advanced Surgical Techniques",
     "url": "https://doi.org/10.1089/lap.2020.0468"
    },
    {
     "title": "Association of Obesity and Bariatric Surgery on Hair Health (PMC10890033)",
     "publisher": "PubMed Central (PMC10890033)",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC10890033/"
    },
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ]
  },
  {
   "slug": "stopping-breastfeeding",
   "name": "Stopping breastfeeding",
   "category": "Life events",
   "aliases": [
    "weaning",
    "hair loss after weaning",
    "hair loss after stopping breastfeeding"
   ],
   "url": "https://hairexperts.org/triggers/stopping-breastfeeding/",
   "quotable": "HealthLink BC notes that, because of hormone changes, people often lose hair for 1 to 6 months after childbirth or after they stop breastfeeding; Johns Hopkins adds that breastfeeding can lengthen the shedding period.",
   "clock": {
    "anchor": "the date you stopped breastfeeding",
    "onset": null,
    "peak": null,
    "settled": [
     4,
     26
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Duration",
     "window": "Often 1–6 months after weaning",
     "note": "HealthLink BC: people often lose hair for 1 to 6 months after childbirth or after they stop breastfeeding.",
     "source": "https://www.healthlinkbc.ca/healthwise/scalp-problems"
    },
    {
     "stage": "Context",
     "window": "Breastfeeding can extend shedding",
     "note": "Johns Hopkins: women who breastfeed might notice a longer period of shedding as hormonal changes continue.",
     "source": "https://www.hopkinsmedicine.org/health/wellness-and-prevention/postpartum-hair-loss"
    },
    {
     "stage": "Benchmark",
     "window": "Fullness by the child's first birthday (postpartum)",
     "note": "AAD: most women regain normal fullness by their child's first birthday.",
     "source": "https://www.aad.org/public/diseases/hair-loss/insider/new-moms"
    }
   ],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "No return to normal fullness after about a year",
    "Exhaustion, palpitations or feeling cold — ask about thyroid and iron"
   ],
   "sources": [
    {
     "title": "Scalp problems",
     "publisher": "HealthLink BC",
     "url": "https://www.healthlinkbc.ca/healthwise/scalp-problems"
    },
    {
     "title": "Postpartum hair loss",
     "publisher": "Johns Hopkins Medicine",
     "url": "https://www.hopkinsmedicine.org/health/wellness-and-prevention/postpartum-hair-loss"
    },
    {
     "title": "Hair loss in new moms: dermatologist tips",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/new-moms"
    },
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    }
   ]
  },
  {
   "slug": "stopping-birth-control",
   "name": "Stopping birth control",
   "category": "Life events",
   "aliases": [
    "coming off the pill",
    "post-pill hair loss",
    "hair shedding after stopping birth control"
   ],
   "url": "https://hairexperts.org/triggers/stopping-birth-control/",
   "quotable": "When a woman stops oral contraceptives, shedding may begin 2 or 3 months later and continue for about 6 months before it usually stops, according to HealthLink BC; the AAD lists stopping the pill among common shedding triggers.",
   "clock": {
    "anchor": "the date you stopped the pill",
    "onset": [
     8,
     13
    ],
    "peak": null,
    "settled": null
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Onset",
     "window": "2–3 months after stopping",
     "note": "HealthLink BC: shedding may begin 2 or 3 months after stopping oral contraceptives.",
     "source": "https://www.healthlinkbc.ca/healthwise/causes-hair-loss-medicines-and-medical-treatments"
    },
    {
     "stage": "Duration",
     "window": "About 6 months, then usually stops",
     "note": "It may continue for 6 months and then usually stops.",
     "source": "https://www.healthlinkbc.ca/healthwise/causes-hair-loss-medicines-and-medical-treatments"
    }
   ],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "A widening part or thinning crown that keeps progressing",
    "Irregular periods, acne or excess facial hair (ask about hormones)"
   ],
   "sources": [
    {
     "title": "Causes of hair loss: medicines and medical treatments",
     "publisher": "HealthLink BC",
     "url": "https://www.healthlinkbc.ca/healthwise/causes-hair-loss-medicines-and-medical-treatments"
    },
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    },
    {
     "title": "Female pattern hair loss — differential diagnosis (telogen effluvium)",
     "publisher": "NICE Clinical Knowledge Summaries",
     "url": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    }
   ]
  },
  {
   "slug": "covid-high-fever",
   "name": "COVID-19 & high fever",
   "category": "Life events",
   "aliases": [
    "post-COVID hair loss",
    "hair loss after flu",
    "hair loss 2 months after covid"
   ],
   "url": "https://hairexperts.org/triggers/covid-high-fever/",
   "quotable": "After COVID-19, hair shedding usually begins 2 to 3 months later and lasts 3 to 6 months (AAD); a JAAD case series found onset at a median of 45 days, somewhat earlier than after other triggers.",
   "clock": {
    "anchor": "the date the fever or COVID illness began",
    "onset": [
     6,
     13
    ],
    "peak": null,
    "settled": null
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Onset",
     "window": "Usually 2–3 months after; median 45 days in one series",
     "note": "AAD: shedding usually begins 2 to 3 months after COVID-19; one study found it often began after 56 days.",
     "source": "https://www.aad.org/public/diseases/hair-loss/causes/covid-19"
    },
    {
     "stage": "Earlier than usual?",
     "window": "Median 45 days (n=30)",
     "note": "JAAD letter: onset at a median of 45 days after a positive test; median duration 47.5 days.",
     "source": "https://www.jaad.org/article/S0190-9622(21)02149-6/fulltext"
    },
    {
     "stage": "Duration",
     "window": "Usually 3–6 months",
     "note": "AAD: shedding usually lasts 3 to 6 months, then hair starts regrowing on its own.",
     "source": "https://www.aad.org/public/diseases/hair-loss/causes/covid-19"
    },
    {
     "stage": "Full regrowth",
     "window": "Most within 6–8 months",
     "note": "AAD: most people see complete regrowth within 6 to 8 months.",
     "source": "https://www.aad.org/public/diseases/hair-loss/causes/covid-19"
    }
   ],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Round, smooth patches (possible alopecia areata)",
    "Shedding continuing beyond about 6 months"
   ],
   "sources": [
    {
     "title": "Can COVID-19 cause hair loss?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/causes/covid-19"
    },
    {
     "title": "Time of onset and duration of post-COVID-19 acute telogen effluvium (n=30)",
     "publisher": "Journal of the American Academy of Dermatology",
     "url": "https://www.jaad.org/article/S0190-9622(21)02149-6/fulltext"
    },
    {
     "title": "Characteristics of hair loss after COVID-19: a systematic scoping review (PMC9349634)",
     "publisher": "PubMed Central (PMC9349634)",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9349634/"
    },
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    }
   ]
  },
  {
   "slug": "crash-diet-fasting",
   "name": "Crash diet & fasting",
   "category": "Life events",
   "aliases": [
    "rapid weight loss",
    "very low calorie diet",
    "hair loss after crash diet"
   ],
   "url": "https://hairexperts.org/triggers/crash-diet-fasting/",
   "quotable": "Losing 20 pounds or more is a common trigger of excessive shedding (AAD), and NICE lists excessive diets among telogen effluvium triggers, which typically appears around 3 months after the trigger and lasts about 6 months.",
   "clock": {
    "anchor": "the date the diet started",
    "onset": [
     8,
     16
    ],
    "peak": null,
    "settled": [
     26,
     39
    ]
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Trigger",
     "window": "Losing 20 lb or more; excessive diets",
     "note": "AAD lists losing 20 pounds or more; NICE lists excessive diets.",
     "source": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "stage": "Onset",
     "window": "Around 3 months after",
     "note": "NICE: telogen effluvium occurs around 3 months after a triggering event.",
     "source": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    },
    {
     "stage": "Duration",
     "window": "Usually self-limiting, about 6 months",
     "note": "NICE: usually self-limiting, lasting for about 6 months.",
     "source": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    }
   ],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Ongoing restriction or disordered eating",
    "Dizziness, missed periods or hair that is breaking as well as shedding"
   ],
   "sources": [
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    },
    {
     "title": "Female pattern hair loss — differential diagnosis (telogen effluvium)",
     "publisher": "NICE Clinical Knowledge Summaries",
     "url": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    },
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ]
  },
  {
   "slug": "stopping-minoxidil",
   "name": "Stopping minoxidil",
   "category": "Starting/stopping treatments",
   "aliases": [
    "stopping Rogaine",
    "quit minoxidil",
    "what happens when you stop minoxidil"
   ],
   "url": "https://hairexperts.org/triggers/stopping-minoxidil/",
   "quotable": "If minoxidil is stopped, the pretreatment appearance normally returns within 3 or 4 months, and after several years of use the hair that was genetically programmed to be lost in that time will fall out (DermNet).",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Return to baseline",
     "window": "Within 3 or 4 months",
     "note": "DermNet: the pretreatment appearance will normally return within 3 or 4 months.",
     "source": "https://dermnetnz.org/topics/minoxidil-solution"
    },
    {
     "stage": "After years of use",
     "window": "Hair 'saved' during use falls out",
     "note": "Hair that was genetically programmed to be lost during that time will fall out.",
     "source": "https://dermnetnz.org/topics/minoxidil-solution"
    }
   ],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Rapid loss far beyond your pre-treatment pattern"
   ],
   "sources": [
    {
     "title": "Minoxidil",
     "publisher": "DermNet",
     "url": "https://dermnetnz.org/topics/minoxidil-solution"
    }
   ]
  },
  {
   "slug": "hair-transplant-shock-loss",
   "name": "Hair transplant shock loss",
   "category": "Procedures",
   "aliases": [
    "shock loss",
    "recipient-site effluvium",
    "hair transplant shock loss week by week"
   ],
   "url": "https://hairexperts.org/triggers/hair-transplant-shock-loss/",
   "quotable": "Shock loss (recipient-site effluvium) — shedding of native hairs around the grafts — typically occurs 2–8 weeks after surgery, with regrowth usually starting around 3 months; reported incidence ranges from 0.15% to 15%.",
   "clock": {
    "anchor": "the transplant date",
    "onset": [
     2,
     8
    ],
    "peak": null,
    "settled": null
   },
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Shock loss window",
     "window": "Weeks 2–8",
     "note": "Typically occurs within 2–8 weeks after surgery.",
     "source": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12909172/"
    },
    {
     "stage": "Regrowth",
     "window": "Usually begins around month 3",
     "note": "Regrowth usually begins around 3 months postoperatively.",
     "source": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12909172/"
    }
   ],
   "warning": [
    "Increasing pain, redness, pus or fever",
    "Crusts persisting beyond 2 weeks",
    "No regrowth well after month 3–4 — see your surgeon"
   ],
   "sources": [
    {
     "title": "Complications in follicular unit excision hair transplantation: current evidence and practical approaches (PMC12909172)",
     "publisher": "Frontiers in Medicine, 2026",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12909172/"
    }
   ]
  },
  {
   "slug": "lamotrigine",
   "name": "Lamotrigine (Lamictal)",
   "category": "Medications",
   "aliases": [
    "Lamictal",
    "lamotrigine hair loss",
    "lamotrigine hair loss how long"
   ],
   "url": "https://hairexperts.org/triggers/lamotrigine/",
   "quotable": "In a review of pharmacovigilance reports of lamotrigine-associated alopecia, onset was variable: 17 people within one month, 48 between one and six months, and 31 after six months of starting.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Any new rash, especially with fever — contact your prescriber urgently",
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair"
   ],
   "sources": [
    {
     "title": "Antiseizure medication-induced alopecia: a literature review (PMC10301592)",
     "publisher": "PubMed Central (PMC10301592)",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC10301592/"
    },
    {
     "title": "Alopecia from drugs",
     "publisher": "DermNet",
     "url": "https://dermnetnz.org/topics/alopecia-from-drugs"
    }
   ]
  },
  {
   "slug": "valproate-depakote",
   "name": "Valproate (Depakote)",
   "category": "Medications",
   "aliases": [
    "Depakote",
    "divalproex",
    "valproic acid",
    "depakote hair loss"
   ],
   "url": "https://hairexperts.org/triggers/valproate-depakote/",
   "quotable": "DermNet lists valproic acid as causing hair loss in 12–28% of users, dose-dependently, among the highest rates of any anticonvulsant; a review of anti-seizure medicines found valproate was the drug most commonly associated with alopecia in one paediatric series.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Any signs of liver problems such as yellow skin, dark urine or abdominal pain — seek care urgently"
   ],
   "sources": [
    {
     "title": "Alopecia from drugs",
     "publisher": "DermNet",
     "url": "https://dermnetnz.org/topics/alopecia-from-drugs"
    },
    {
     "title": "Antiseizure medication-induced alopecia: a literature review (PMC10301592)",
     "publisher": "PubMed Central (PMC10301592)",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC10301592/"
    }
   ]
  },
  {
   "slug": "isotretinoin-accutane",
   "name": "Isotretinoin (Accutane)",
   "category": "Medications",
   "aliases": [
    "Accutane",
    "Absorica",
    "Claravis",
    "accutane hair loss dose"
   ],
   "url": "https://hairexperts.org/triggers/isotretinoin-accutane/",
   "quotable": "A systematic review of 22 studies found hair loss in 3.2% of acne patients on isotretinoin below 0.5 mg/kg/day versus 5.7% on 0.5 mg/kg/day or more, and recommended counselling about telogen effluvium before starting.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Low mood or thoughts of self-harm — contact your prescriber or emergency services now"
   ],
   "sources": [
    {
     "title": "Isotretinoin-induced hair loss at <0.5 vs ≥0.5 mg/kg/d: a systematic review (PMC8841364)",
     "publisher": "PubMed Central (PMC8841364)",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC8841364/"
    },
    {
     "title": "Alopecia from drugs",
     "publisher": "DermNet",
     "url": "https://dermnetnz.org/topics/alopecia-from-drugs"
    }
   ]
  },
  {
   "slug": "sertraline-ssris",
   "name": "Sertraline & SSRIs",
   "category": "Medications",
   "aliases": [
    "Zoloft",
    "sertraline",
    "antidepressant hair loss",
    "sertraline hair loss after 2 weeks"
   ],
   "url": "https://hairexperts.org/triggers/sertraline-ssris/",
   "quotable": "Hair loss is a rare reported side effect of sertraline; one published case described diffuse hair loss within 2 weeks of starting that improved after the drug was stopped, and NICE lists antidepressants among drugs implicated in telogen effluvium.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Worsening mood or thoughts of self-harm — contact your prescriber or emergency services now"
   ],
   "sources": [
    {
     "title": "Diffuse hair loss induced by sertraline use (case report, PMC4589582)",
     "publisher": "Case Reports in Psychiatry, 2015",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC4589582/"
    },
    {
     "title": "Female pattern hair loss — differential diagnosis (telogen effluvium)",
     "publisher": "NICE Clinical Knowledge Summaries",
     "url": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    },
    {
     "title": "Alopecia from drugs",
     "publisher": "DermNet",
     "url": "https://dermnetnz.org/topics/alopecia-from-drugs"
    }
   ]
  },
  {
   "slug": "anticoagulants-eliquis-xarelto-warfarin",
   "name": "Anticoagulants (Eliquis, Xarelto, warfarin)",
   "category": "Medications",
   "aliases": [
    "Eliquis",
    "apixaban",
    "Xarelto",
    "rivaroxaban",
    "warfarin",
    "does eliquis cause hair loss"
   ],
   "url": "https://hairexperts.org/triggers/anticoagulants-eliquis-xarelto-warfarin/",
   "quotable": "DermNet lists heparin and warfarin among drugs that cause telogen effluvium and says newer anticoagulants such as rivaroxaban, dabigatran and apixaban possibly do; NICE also lists anticoagulants as a telogen effluvium trigger.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Unusual bleeding or bruising — contact your prescriber"
   ],
   "sources": [
    {
     "title": "Alopecia from drugs",
     "publisher": "DermNet",
     "url": "https://dermnetnz.org/topics/alopecia-from-drugs"
    },
    {
     "title": "Female pattern hair loss — differential diagnosis (telogen effluvium)",
     "publisher": "NICE Clinical Knowledge Summaries",
     "url": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    },
    {
     "title": "Causes of hair loss: medicines and medical treatments",
     "publisher": "HealthLink BC",
     "url": "https://www.healthlinkbc.ca/healthwise/causes-hair-loss-medicines-and-medical-treatments"
    },
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    }
   ]
  },
  {
   "slug": "levothyroxine-dose-change",
   "name": "Levothyroxine changes",
   "category": "Medications",
   "aliases": [
    "Synthroid",
    "Levoxyl",
    "thyroid medication",
    "levothyroxine hair loss first months"
   ],
   "url": "https://hairexperts.org/triggers/levothyroxine-dose-change/",
   "quotable": "Levothyroxine labelling says partial hair loss may occur rarely during the first few months of therapy and is usually temporary.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [
    {
     "stage": "Window",
     "window": "First few months of therapy",
     "note": "Partial hair loss may occur rarely during the first few months; usually temporary.",
     "source": "https://www.pfizermedical.com/levoxyl/info-for-patient"
    }
   ],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Palpitations, tremor, heat intolerance or weight loss — signs your dose may need review"
   ],
   "sources": [
    {
     "title": "LEVOXYL (levothyroxine) patient counseling information & Medication Guide",
     "publisher": "Pfizer / FDA labeling",
     "url": "https://www.pfizermedical.com/levoxyl/info-for-patient"
    },
    {
     "title": "Female pattern hair loss — differential diagnosis (telogen effluvium)",
     "publisher": "NICE Clinical Knowledge Summaries",
     "url": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    }
   ]
  },
  {
   "slug": "ferritin-hair-loss",
   "name": "Ferritin & iron",
   "category": "Labs & explainers",
   "aliases": [
    "ferritin",
    "iron deficiency",
    "ferritin level for hair loss"
   ],
   "url": "https://hairexperts.org/triggers/ferritin-hair-loss/",
   "quotable": "One study of 155 women with hair loss defined iron deficiency as ferritin below 60 ng/mL and cited 40–60 ng/mL as the adequate level for hair growth — much higher than the level linked to anaemia — but thresholds differ, so ask your doctor about testing.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Heavy periods, breathlessness, or very low energy",
    "Shedding with no obvious trigger lasting more than 6 months",
    "Patches or smooth bald spots"
   ],
   "sources": [
    {
     "title": "Diagnosis and treatment of female alopecia: focusing on iron deficiency-related alopecia (n=155)",
     "publisher": "PubMed Central (PMC10683524)",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC10683524/"
    },
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    }
   ]
  },
  {
   "slug": "vitamin-d-hair-loss",
   "name": "Vitamin D",
   "category": "Labs & explainers",
   "aliases": [
    "vitamin D",
    "25(OH)D",
    "vitamin d deficiency hair loss"
   ],
   "url": "https://hairexperts.org/triggers/vitamin-d-hair-loss/",
   "quotable": "A case-control study of women with female pattern hair loss classed vitamin D below 20 ng/mL as deficient and 20–30 as insufficient, and its background notes conflicting results — including a New Zealand study of 296 men that found no link with male pattern alopecia.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Bone pain or muscle weakness",
    "Shedding without a trigger lasting more than 6 months",
    "Patches or smooth bald spots"
   ],
   "sources": [
    {
     "title": "Serum vitamin D3 level in patients with female pattern hair loss (PMC5007917)",
     "publisher": "PubMed Central (PMC5007917)",
     "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC5007917/"
    },
    {
     "title": "Female pattern hair loss — differential diagnosis (telogen effluvium)",
     "publisher": "NICE Clinical Knowledge Summaries",
     "url": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    }
   ]
  },
  {
   "slug": "seasonal-hair-shedding",
   "name": "Seasonal shedding",
   "category": "Life events",
   "aliases": [
    "autumn shedding",
    "fall hair shedding",
    "hair shedding in september"
   ],
   "url": "https://hairexperts.org/triggers/seasonal-hair-shedding/",
   "quotable": "In a UK study of 14 men, shed hairs peaked around August–September at about 60 a day, more than double the preceding winter; a study of 823 women found the proportion of resting (telogen) hairs peaked in summer, with a smaller peak in spring.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Patches or smooth bald spots",
    "Scalp pain, redness, burning or scaling",
    "Loss of eyebrows, eyelashes or body hair",
    "Shedding far beyond your usual seasonal pattern, or lasting all year"
   ],
   "sources": [
    {
     "title": "Seasonal changes in human hair growth (14 men, Sheffield UK)",
     "publisher": "British Journal of Dermatology, 1991 (PubMed 2003996)",
     "url": "https://pubmed.ncbi.nlm.nih.gov/2003996/"
    },
    {
     "title": "Seasonality of hair shedding in healthy women complaining of hair loss (n=823)",
     "publisher": "Dermatology, 2009 (PubMed 19407435)",
     "url": "https://pubmed.ncbi.nlm.nih.gov/19407435/"
    }
   ]
  },
  {
   "slug": "braids-traction-alopecia",
   "name": "Braids & traction",
   "category": "Life events",
   "aliases": [
    "traction alopecia",
    "cornrows",
    "weaves",
    "braids hair loss edges"
   ],
   "url": "https://hairexperts.org/triggers/braids-traction-alopecia/",
   "quotable": "Traction alopecia can get better when it has only been present for a few weeks or months if the tension is stopped, but long-term repetitive pulling can cause permanent loss from follicle damage (British Association of Dermatologists).",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Pain, stinging, bumps or crusts after braiding",
    "Thinning edges or temples",
    "Smooth, shiny patches"
   ],
   "sources": [
    {
     "title": "Traction alopecia — patient information leaflet",
     "publisher": "British Association of Dermatologists",
     "url": "https://www.bad.org.uk/pils/traction-alopecia"
    },
    {
     "title": "Hairstyles that pull can lead to hair loss",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/causes/hairstyles"
    }
   ]
  },
  {
   "slug": "telogen-club-hair",
   "name": "Telogen club hair",
   "category": "Hair signs",
   "aliases": [
    "white bulb on hair root",
    "club hair",
    "telogen hair"
   ],
   "url": "https://hairexperts.org/triggers/telogen-club-hair/",
   "quotable": "A shed hair with a small white bulb at the root is a resting (telogen) 'club' hair; DermNet explains that in telogen effluvium these are pushed out by new growth, so increased fall is paradoxically a sign of regrowth.",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Hairs with pointed tips falling in large numbers",
    "Patches or broken stubs",
    "Scalp pain, redness, burning or scaling"
   ],
   "sources": [
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    },
    {
     "title": "Do you have hair loss or hair shedding?",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/insider/shedding"
    }
   ]
  },
  {
   "slug": "regrowth-vs-breakage",
   "name": "Regrowth vs breakage",
   "category": "Hair signs",
   "aliases": [
    "baby hairs",
    "short hairs on hairline",
    "is it regrowth or breakage"
   ],
   "url": "https://hairexperts.org/triggers/regrowth-vs-breakage/",
   "quotable": "A fine fringe of short new hairs along the hairline is a common sign of recovery after telogen effluvium (DermNet), while broken hairs around the forehead are an early warning sign of traction hair loss (AAD).",
   "clock": null,
   "clockUnits": "weeks after anchor date; null = not reliably sourced",
   "stages": [],
   "warning": [
    "Broken hairs at the edges with a receding hairline",
    "Pain or crusts from styles",
    "Patches or smooth bald spots"
   ],
   "sources": [
    {
     "title": "Telogen effluvium",
     "publisher": "DermNet (Chang F-L, Oakley A, 2019)",
     "url": "https://dermnetnz.org/topics/telogen-effluvium"
    },
    {
     "title": "Hairstyles that pull can lead to hair loss",
     "publisher": "American Academy of Dermatology",
     "url": "https://www.aad.org/public/diseases/hair-loss/causes/hairstyles"
    },
    {
     "title": "Female pattern hair loss — differential diagnosis (telogen effluvium)",
     "publisher": "NICE Clinical Knowledge Summaries",
     "url": "https://cks.nice.org.uk/topics/female-pattern-hair-loss-female-androgenetic-alopecia/diagnosis/differential-diagnosis/"
    }
   ]
  }
 ],
 "updated": "2026-10-30",
 "license": "Free to cite with attribution to hairexperts.org",
 "disclaimer": "Educational only — not medical advice."
}