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What is the reported incidence of hair thinning on semaglutide in FLOW?

Asked 13 May 2024Modified 23 months agoViewed 33k times
25

Conditions: hair thinning · semaglutide · FLOW.

The figures are clear enough; the question is what they mean and what they do not.

I can supply the numbers if the specifics change the answer.

What can I legitimately conclude from this figure?

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askedmg_per_ml15k1613 May 2024

5 Answers

Accepted answer first, then by votes
97

Accepted answer

Start with the timing, because telogen effluvium has a characteristic delay of two to four months between the trigger and the shed.

Worth checking: ferritin, thyroid function and vitamin D. Low ferritin in particular is associated with shedding at levels that are not low enough to cause anaemia.

It is diffuse: increased shedding across the whole scalp, often noticed in the shower or on a brush, without a receding hairline or a defined crown pattern. Patterned loss is androgenetic and unrelated.

The two-to-four-month latency follows directly from the duration of the telogen phase and is the diagnostic feature of the condition.

Supplementing without a measured deficiency has no evidence behind it here and is not harmless at high doses.

The trigger is the rate of loss, not the compound. Slowing it helps future follicles.

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answered · acceptedtriple_agonist_q57k3826 May 2024
7Does the tolerance develop at the same rate for the daily agents? – deamidation_watch 8 months ago
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86

Answer first: the pattern reported here is telogen effluvium — a diffuse shed triggered by a physiological stressor — and rapid weight loss is a well-established trigger for it.

Slowing the rate of weight loss reduces the severity of the trigger. It does not reverse a shed already in progress, because the follicles have already committed.

Recovery follows the same timeline in reverse: shedding stops within a few months of the trigger resolving, and visible density returns over six to twelve months as regrowth reaches length.

Research-use compounds are not approved for human use.

It resolves in most cases over six to twelve months. That is genuinely the answer.

edited 29 May 2024 by colm_dunphy — added a caveat about sampling

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CD
answeredcolm_dunphy8.2k1415 May 2024
Any published figure for how long the constipation persists, given it does not attenuate? – Dr_Rosalind_Achebe 4 months ago
8This is the first explanation of the timing pattern that has actually made sense to me. – bea_castellanos 2 months ago
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42

The part that matters: iron, thyroid and vitamin D are the checks worth doing before concluding anything.

The trigger in this context is the rate of weight loss and the associated nutritional deficit, not a pharmacological property. The same phenomenon is well documented after bariatric surgery, illness and childbirth.

Nothing topical has strong evidence for accelerating recovery from telogen effluvium specifically, as distinct from androgenetic loss where the evidence is entirely different.

Nothing here is medical advice.

Diffuse and delayed means telogen effluvium. Patterned means something else.

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answeredgrainne_ahearn50k3820 Aug 2024
33

The honest answer is that it resolves in most cases within six to nine months and that the resolution cannot be hurried much.

Adequate protein matters. Hair is largely keratin, and follicles are among the most metabolically active tissues, so they are early casualties of a substantial protein shortfall.

Telogen effluvium following rapid weight loss is well documented in the dermatological literature, including extensive description after bariatric surgery.

Protein intake is the modifiable nutritional factor worth attending to.

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answeredteodora_ilic17k271 Sept 2024
Thank you — this is the answer I was looking for. – bea_castellanos 3 months ago
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32

This is one of the most distressing reported effects and one of the most reliably temporary.

In telogen effluvium a stressor shifts a large fraction of follicles from anagen into telogen simultaneously. Because telogen lasts around two to three months, the shed appears two to four months after the trigger rather than during it.

Check ferritin, thyroid and vitamin D once, then stop investigating.

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answeredDr_Otto_Lindqvist72k5829 Jul 2024

Your answer

Ask PeptideStack is a static archive. Posting is closed, but the norms are worth stating: answer the question that was asked, show your working, cite the trial or the certificate, and say plainly where the evidence runs out.

Not medical advice. Research-use-only compounds are not approved for human use.