Does Ozempic or Mounjaro cause hair loss?

The medication is not directly attacking your hair. The shedding people notice is usually telogen effluvium, a temporary, stress-related shedding triggered by rapid weight loss and under-eating. It is common after any fast weight loss and typically recovers.

Will my hair grow back?

In most cases, yes. Telogen effluvium is temporary, and hair usually regrows once weight stabilises and nutrition is adequate. It can take several months, so patience matters.

Should I take biotin for hair loss?

Biotin supplements rarely help unless you have a true deficiency, which is uncommon. You are far better off ensuring enough overall calories, protein, iron, and zinc from food. Ask your doctor about checking ferritin (iron stores) if shedding is significant.

Hair Loss on GLP-1: The Nutrition Connection

Published 21 June 2026Evidence-based · 3 sources

Reviewed by Bogdan Marcu, Licensed Nutritionist & Dietitian

Noticing more hair in the brush a few months into a GLP-1 is unsettling. It is also common, usually temporary, and largely about nutrition rather than the drug itself.

Why it happens

The shedding people describe is typically telogen effluvium, a temporary shift where more hairs than usual enter the resting-and-shedding phase. It is triggered by the physical stress of rapid weight loss and under-eating, not by the medication directly, and it shows up after fast weight loss from any cause. The good news: it generally reverses once your weight stabilises and you are eating enough.

How nutrition helps

Eat enough; don't under-fuel. Very low intake is the main trigger. Use the calorie (TDEE) calculator to gauge your needs.
Hit your protein. Hair is mostly protein. Adequate intake supports both hair and muscle, and higher protein protects lean mass during weight loss. Find your target with the protein calculator and the best high-protein foods.
Mind iron and zinc. Low iron is a common contributor; ask your doctor about checking ferritin. Get iron and zinc from meat, seafood, beans, and seeds.
Skip the biotin hype. Dietary balance beats single-nutrient supplements unless you are truly deficient.

For easy ways to hit protein and minerals on a small appetite, browse the recipes.

When to see a doctor

If shedding is severe, patchy, or lasts well beyond six months, see your doctor or a dermatologist to rule out other causes such as thyroid issues or iron deficiency. This article is general nutrition information and not a substitute for medical care.

Frequently asked questions

Does Ozempic or Mounjaro cause hair loss?: The medication is not directly attacking your hair. The shedding people notice is usually telogen effluvium, a temporary, stress-related shedding triggered by rapid weight loss and under-eating. It is common after any fast weight loss and typically recovers.
Will my hair grow back?: In most cases, yes. Telogen effluvium is temporary, and hair usually regrows once weight stabilises and nutrition is adequate. It can take several months, so patience matters.
Should I take biotin for hair loss?: Biotin supplements rarely help unless you have a true deficiency, which is uncommon. You are far better off ensuring enough overall calories, protein, iron, and zinc from food. Ask your doctor about checking ferritin (iron stores) if shedding is significant.