Study examines potential link between GLP-1 drugs and temporary hair loss

A study published in The BMJ reveals that adults with type 2 diabetes using GLP-1 drugs face a higher risk of temporary, non-scarring hair loss compared to those on SGLT-2 or DPP-4 inhibitors. Analyzing data from January 2019 to September 2024, researchers found GLP-1 users have a 37% and 68% higher chance of hair loss, respectively. Experts attribute this to rapid weight loss, physiological stress, and nutritional deficiencies in iron, zinc, and biotin, advising patients to maintain protein intake and consult doctors before stopping treatment.

GLP-1 medication hair loss risk

• ▪A study published in The BMJ found that adults with type 2 diabetes taking GLP-1 medications have an increased risk of non-scarring alopecia.
• ▪The study compared the risk of alopecia among adults taking GLP-1 drugs, SGLT-2 inhibitors, or DPP-4 inhibitors for type 2 diabetes.

Non-scarring alopecia incidence data

• ▪Approximately six or seven in every 1,000 people taking GLP-1 medications experienced hair loss each year, according to data cited in the study.
• ▪Compared to adults taking SGLT-2 inhibitors, those taking GLP-1 medications had a 37% higher chance of experiencing hair loss.
• ▪The study analyzed electronic health record data from the University of Pennsylvania Health System between January 2019 and September 2024.

Rapid weight loss effects

• ▪Rapid weight loss and physiological stress associated with GLP-1 use can trigger telogen effluvium, a temporary form of hair loss.
• ▪Individuals experiencing very rapid weight loss, pre-existing nutritional deficiencies, or underlying androgenetic hair loss are more susceptible to shedding.

Nutritional deficiency contributions

• ▪Reduced calorie intake from GLP-1 use can lead to nutritional deficiencies in biotin, iron, and zinc, which may contribute to hair loss.
• ▪Maintaining adequate protein intake and avoiding excessive calorie restriction can help prevent hair loss during GLP-1 treatment.

Clinical management strategies

• ▪Strategies to manage non-scarring alopecia include limiting heated hair tools, following a protein- and iron-rich diet, and stopping smoking.
• ▪General practitioners advise patients experiencing hair shedding on GLP-1 drugs not to discontinue treatment without medical advice.

Patient monitoring recommendations

• ▪Healthcare providers suggest arranging blood tests to check for iron deficiency, thyroid disease, and vitamin B12 if hair shedding develops.
• ▪Clinicians recommend routine monitoring of basic nutritional labs, including iron, zinc, and biotin, if hair loss becomes a concern.