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Popular weight-loss drugs Ozempic, Wegovy, and Zepbound may raise hair loss risk by 7% in men genetically predisposed to male-pattern baldness, according to new research from NYU Langone Health. A separate large BMJ study also found GLP-1 users had significantly higher rates of alopecia compared to patients on other diabetes medications. Together, the findings suggest hair loss tied to these drugs isn't just about rapid weight loss — there may be a deeper biological link.
Hair thinning has long been reported as a side effect of GLP-1 drugs like Ozempic and Wegovy, with most experts chalking it up to rapid weight loss. But two new studies suggest the story is more complicated — and that genetics may play a meaningful role.
Researchers at NYU Langone Health found that men with a genetic predisposition to male-pattern baldness (androgenetic alopecia) face an additional 7% risk of hair loss when using GLP-1 medications. The team analyzed the GLP1R gene — which governs GLP-1 receptor protein levels — and found its activity overlaps with genetic patterns seen in men with inherited hair loss. The link held even after accounting for hypertension, insulin resistance, and testosterone levels, pointing to a distinct biological connection between GLP-1 activity and hair follicles. A separate large study published in The BMJ (July 2026), analyzing nearly 40,000 patients, found that GLP-1 users with type 2 diabetes had a significantly higher relative risk of alopecia compared to patients on SGLT-2 or DPP-4 inhibitors — and the hair loss was mostly non-scarring, meaning regrowth is possible.
By the Numbers
Why it matters: As GLP-1 prescriptions continue to surge, clinicians need to be aware of hair loss as a potential side effect that goes beyond rapid weight loss. Future genetic screening could help identify at-risk patients before they start treatment, and combination therapies like minoxidil may eventually be used preventively.
