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Can liothyronine cause hair loss?

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General Hair Loss Questions

I’ve been on liothyronine for thyroid issues and recently noticed more shedding than usual. I’m wondering if this medication could be the cause, or if it’s more likely related to my underlying thyroid condition. Has anyone else dealt with this, and did the hair loss improve after adjusting the dose or stopping the medication?

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    Liothyronine (T3) can cause shedding, but it’s usually temporary. Telogen effluvium right after you start or change the dose can be common because the hair cycle gets “shocked,” more follicles jump into resting mode, and you probably see more fall-out than usual at around 6–12 weeks later. Having a thyroid issue and being under or over-treated could result in shedding. The fix in either case is getting back to steady, euthyroid levels; once things stabilize, shedding typically settles and density creeps back over 3–6 months.
    The actual mechanism relating to hair-loss & liothyronine is that sudden changes in thyroid hormone will essentially re-set or re-time the hair-cycle which can result in a delayed shed, but once stabilized may result in recovery. You could look into something like minoxidil to help support the recovery time. You can check out anagen.xyz for a range of evidence-backed products like 'Au Naturale' which is a caffeine + adenosine + melatonin + watercress extract built for supporting hair-regrowth while your hormone levels stabilize.

    icon Mike Histotechnician - Aug 14, 2025 | Reply


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