A new study found that users of GLP-1 drugs reported higher rates of nail detachment and discoloration compared to nonusers, though researchers caution that the study cannot prove causation.

A new study has identified a potential link between GLP-1 medications and unusual nail changes, including detachment and discoloration. Researchers found that users reported nail detachment more than four times as often as nonusers, while 46% of GLP-1 users reported nail discoloration compared to 17% of nonusers. The study examined a sample of 575 GLP-1 users and 1,329 nonusers across France, the United States, Brazil, and Mexico.

Study Findings and Limitations

The researchers noted that nail detachment and discoloration remained two to three times more common among users even after adjusting for nutritional deficiencies and skin conditions. However, study author Dr. Charles Taïeb stated that when researchers counted only nail changes that began after treatment started, the link between the drugs and nail detachment nearly disappeared. The study design, which captured self-reported symptoms at a single point in time, cannot establish that the medications caused the observed changes. Experts suggest that indirect factors, such as reduced intake of protein, iron, and zinc due to appetite suppression, may contribute to these nail issues. Dr. Tanya Evans, a dermatologist, noted that rapid weight loss can also temporarily disrupt nail growth. The findings have been submitted to peer-reviewed dermatology journals and are currently under review.

Expert Perspectives and Recommendations

Dr. Mir B. Ali, a bariatric surgeon, stated that he has not observed nail detachment in his practice, noting that patients more frequently report brittle nails or minor color changes. He emphasized that hair and nail changes are often associated with the metabolic and hormonal shifts that accompany weight loss, and that these issues often resolve as weight stabilizes. Medical experts advise patients not to stop taking their medication due to nail changes but to consult a dermatologist. A specialist can evaluate whether symptoms are linked to nutritional deficiencies, infections, or other underlying conditions. The American Academy of Dermatology recommends seeking professional evaluation for any nail that is lifting.