GLP-1 receptor agonists may increase hair loss risk

After adjusting for potentially influential factors including age, sex, ethnicity, pre-existing conditions, other medication use, and body mass index, use of GLP-1 receptor agonists was associated with a 37% higher risk of alopecia than use of SGLT-2 inhibitors (6.91 v 5.04 per 1,000 person years) and a 68% higher risk than use of DPP-4 inhibitors (6.53 v 3.89 per 1,000 person years).

Further analyses indicated that the association was specific to non-scarring alopecia (where hair follicles remain intact, leaving the potential for regrowth) with an increased risk of 53% and 72% compared with SGLT-2 inhibitors and DPP-4 inhibitors, respectively.

The authors point out that rapid weight loss is a well established trigger of hair shedding and can also lead to iron or zinc deficiencies, which disrupt the hair growth cycle. Hormonal changes may also be relevant, they note, although further studies are needed to clarify the underlying mechanisms.

However, they say this was a rigorous study based on high quality data from a large representative cohort and results were consistent after additional analyses, suggesting they are reliable.

Source:

BMJ Group

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