Hair loss on GLP-1 medicines

In short

Hair loss is listed in Wegovy and Zepbound label tables and was seen more often in people losing weight than on placebo. Much of it is likely telogen effluvium, a temporary shedding pattern after rapid weight loss.

Why it happens

Rapid weight loss, a big drop in calories and low protein are known stressors on hair. They can push many hair follicles into a resting phase at once, a pattern called telogen effluvium. The hair then sheds a few months later.

It is not clear whether GLP-1 medicines affect hair directly or whether the shedding comes from fast weight loss itself. The same pattern is seen after bariatric surgery.

When it starts and fades

Telogen effluvium typically starts about 2 to 4 months after the trigger, so shedding may begin well into treatment. It often slows within several months as weight loss levels off.

In most cases hair grows back over time, though regrowth is gradual.

What helps

• Hit your daily protein floor, since low protein is a known hair stressor.
• Aim for steady loss rather than the fastest possible pace.
• Eat a varied diet with enough iron, zinc and other nutrients; ask about testing before adding supplements.
• Be gentle with hair: avoid tight styles and harsh heat.
• Track shedding with photos so you can see whether it is slowing.