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Best vitamins for GLP-1 hair loss

You are dealing with a symptom and want to know if it is expected.

Reference and calculator, not medical advice. This page explains how something works; it does not tell you what to take. Last reviewed August 2026.

The vitamin framing assumes a deficiency. That assumption is worth examining, because the trials that recorded hair loss did not report nutrient status alongside it — so the labels neither support nor rule out a deficiency explanation. They simply do not address it.

This matters because a deficiency is a testable, correctable thing, and a supplement bought on the assumption of one is neither. If iron, vitamin D or something else is genuinely low, a blood test finds it, a targeted correction addresses it, and a follow-up test confirms it worked. If nothing is low, no amount of supplementation creates a benefit — and some vitamins have a meaningful upper limit rather than being harmless in excess.

What each label actually reports

Incidence figures come from the adverse-reaction sections of the prescribing information. The two weight-management products report trial data; the diabetes products list alopecia only as a postmarketing report.

ProductReported inWomenMen
Wegovy SemaglutideClinical trials4%0.9%
Zepbound TirzepatideClinical trials7.1%0.5%
Ozempic SemaglutidePostmarketing reports onlyno denominatorno denominator
Mounjaro TirzepatidePostmarketing reports onlyno denominatorno denominator
Rybelsus Semaglutide (oral)Postmarketing reports onlyno denominatorno denominator
Saxenda LiraglutidePostmarketing reports onlyno denominatorno denominator
Trulicity DulaglutidePostmarketing reports onlyno denominatorno denominator

A postmarketing entry means the reaction has been reported after approval but the label gives no rate, because spontaneous reports have no denominator. It is not evidence that the rate is lower — only that it was not measured. Every figure above is checked against the label linked at the foot of this page.

Note what the label data does say, because it constrains the deficiency story. The reaction was reported several times more often in women than in men at the same doses, and it was reported by 1–2% of people taking placebo. Any explanation resting purely on reduced intake would need to account for both.

Common questions

Which vitamins are named in the labels?
None, in connection with hair loss, in any of the seven. This is a question the source documents are silent on.
Is eating less likely to cause deficiency?
Eating substantially less makes adequate intake harder — that much is arithmetic, not medicine. Whether it has reached a deficiency in you is a blood test, not an inference.
Is a multivitamin a reasonable default?
That is a conversation for your prescriber or a dietitian, who can look at what you are actually eating. This site publishes what the labels contain, and they contain nothing on this.
Does biotin interfere with anything?
Biotin at supplement doses can distort several laboratory assays including thyroid tests. Since thyroid function is one of the things worth checking when hair is shedding, mention any biotin you take before bloods are drawn.

Sources and last review

This page is general reference rather than a dosing table, so it quotes no figures from a label. Nothing here is reviewed by a clinician, and this site does not employ one — which is exactly why what I do publish stays traceable to its source.

Transcribed from the labels above and checked by me — Gavin, who builds this site, takes a GLP-1, and is not a clinician. Last reviewed August 2026. Found an error? [email protected] — I treat corrections as bugs. How this site is built and funded.

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