Metformin FAQs

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4 questions

FAQs

Does metformin help control DHT levels that trigger androgenic alopecia? Metformin has been shown to lower circulating androgens in women with PCOS, but no published study has measured scalp DHT, 5-alpha reductase activity in the follicle, or hair density in anyone taking it — so its effect on pattern hair loss is untested, and it is not a DHT blocker.
Can metformin improve scalp health in people with insulin resistance or PCOS? There is no controlled trial showing that metformin improves scalp hair. The PCOS studies most often cited measured unwanted body hair, not scalp density, and a published case report describes hair loss during metformin treatment; any use for hair would be off-label and a decision for a prescribing doctor.
Is metformin used topically for hair loss, or only as an oral tablet? Approved metformin products are oral tablets only; there is no approved topical metformin for hair loss. Published human reports of topical use are a handful of uncontrolled, pharmacy-compounded case reports in scarring alopecia, and the most-cited clinical series actually used the oral drug.
What are the main side effects of using metformin for hair regrowth? Common side effects of metformin include gastrointestinal issues, nausea, and potential vitamin B12 deficiency.