Archive · 23 Jul 2026
GLP-1 drugs linked to higher hair loss risk
A new study found that people taking GLP-1 drugs like Ozempic, Wegovy, and Mounjaro might have a higher chance of losing their hair.
The study looked at health records of about 50,000 adults and found that those on GLP-1 drugs had a 37% higher risk of hair loss compared to people taking other diabetes medicines, and a 68% higher risk compared to another group.
Health regulators in the UK and US have received many reports of hair loss linked to these drugs.
Experts think the rapid weight loss caused by these drugs might be the main reason for hair loss, as it can lead to a lack of important nutrients like iron, zinc, and biotin.
However, more research is needed to confirm if the drugs themselves cause hair loss or if it's mainly due to the weight loss.
Hair loss might not be physically harmful, but it can affect how people feel about themselves and their quality of life.
GLP-1 drugs like Ozempic, Wegovy, and Mounjaro are linked to a higher risk of hair loss.
The study found a 37% higher risk of alopecia compared to SGLT-2 inhibitors and a 68% higher risk compared to DPP-4 inhibitors.
UK regulators have received over 1,200 reports of hair loss linked to semaglutide and tirzepatide since last year.
Rapid weight loss from GLP-1 drugs may cause nutrient deficiencies, leading to hair loss.
More research is needed to determine if the drugs themselves cause hair loss or if it's due to rapid weight loss.
- Who
- Researchers from the University of Pennsylvania and health regulators in the UK and US
- What
- A study linking GLP-1 drugs to a higher risk of hair loss
- When
- Study published in the BMJ, with regulatory reports from 2025 and 2026
- Where
- UK and US health regulators, University of Pennsylvania Health System
- Why
- To understand the potential link between GLP-1 drugs and hair loss, and to evaluate the role of rapid weight loss
GLP-1 Drugs Cause Hair Loss
Rapid Weight Loss Causes Hair Loss
Direct Causation
GLP-1 Drugs Cause Hair Loss
GLP-1 drugs directly increase the risk of hair loss due to their metabolic, hormonal, and immune-related effects.
Rapid Weight Loss Causes Hair Loss
The hair loss is primarily due to rapid weight loss, which can cause nutrient deficiencies and physiological stress.
Evidence from Studies
GLP-1 Drugs Cause Hair Loss
The study in the BMJ shows a significant association between GLP-1 drugs and higher rates of alopecia.
Rapid Weight Loss Causes Hair Loss
The study only shows an association, not direct causation, and rapid weight loss is a more likely explanation.
Regulatory Reports
GLP-1 Drugs Cause Hair Loss
The increasing number of reports to regulators supports the idea that GLP-1 drugs are linked to hair loss.
Rapid Weight Loss Causes Hair Loss
Regulatory reports do not prove causation and could be influenced by the rapid weight loss experienced by users.
- Study Source
- British Medical Journal (BMJ)
- Sample Size
- Around 50,000 adults
- Higher Risk Compared to SGLT-2 Inhibitors
- 37%
- Higher Risk Compared to DPP-4 Inhibitors
- 68%
- UK Reports of Hair Loss (2026)
- 400 reports for tirzepatide, 148 reports for semaglutide
- US Regulatory Review
- Ongoing evaluation by the FDA
- Potential Nutrient Deficiencies
- Iron, zinc, and biotin