Losing weight often brings noticeable changes to the body, but not all of them are expected. While medications such as Mounjaro, Wegovy and Ozempic have transformed obesity treatment, researchers are now taking a closer look at whether they could also be linked to hair loss.
According to researchers at the University of Pennsylvania, whose findings were published in the British Medical Journal (BMJ), people taking GLP-1 medications appeared more likely to experience hair loss than patients treated with other diabetes drugs.
The findings come as health regulators in the UK and the US continue monitoring reports of the potential side effect, reports Daily Post UK.
More cases
The research analysed electronic health records from nearly 50,000 adults with type 2 diabetes. Scientists compared patients prescribed GLP-1 medicines with others receiving different diabetes treatments to determine whether hair loss occurred more frequently.
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After adjusting for factors including age and weight, the analysis found that users of GLP-1 medications had a higher likelihood of developing alopecia, the medical term for hair loss. Depending on the comparison group, the increased risk ranged from 37% to 68%.
Possible explanation
The researchers do not believe the medications directly damage hair follicles. Instead, they suggest the effect may be linked to rapid weight loss and a sharp reduction in calorie intake, both of which can disrupt the body's normal hair growth cycle.
Significant weight loss may also increase the risk of deficiencies in nutrients such as iron, zinc and biotin, which are important for healthy hair growth. However, the researchers stressed that further studies are needed to confirm the underlying cause.
- Nearly 50,000 patients were included in the analysis.
- Hair follicles appear to remain intact, meaning hair may regrow in many cases.
- More research is needed to establish a direct cause.
No reason to stop treatment
The researchers emphasised that the findings should not prompt patients to discontinue their medication. The study identifies an association but does not prove that GLP-1 drugs directly cause hair loss.
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Instead, the results may help doctors better inform patients about possible side effects while health authorities continue to monitor the safety of these widely used medications.
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