The short answer
Hair loss is a listed side effect of Zepbound, Wegovy and Foundayo, reported by about 3–7% of people in trials versus 1–2% on placebo, and more often in women. The labels say it was associated with weight reduction: rapid weight loss is a known trigger of temporary shedding (telogen effluvium), which the American Academy of Dermatology says usually regrows to normal fullness within six to nine months. Eating enough protein and checking for other causes like low iron or thyroid problems are sensible steps.
This guide is educational and not medical advice. It does not give dosing instructions. Talk to your prescriber or pharmacist about your own situation.
Hair loss appears in the FDA-approved labels:
| Medicine | Hair loss on drug | On placebo |
|---|---|---|
| Zepbound 5 / 10 / 15 mg | 5% / 4% / 5% (7.1% of women vs 0.5% of men) | 1% |
| Wegovy injection 2.4 mg | 3.3% (4% of women, 0.9% of men) | 1% |
| Wegovy HD 7.2 mg | 5.8% (8.4% of women, 0.2% of men) | 1.0% |
| Foundayo 5.5 / 9 / 17.2 mg | 4% / 4% / 5% | 2% |
The Zepbound, Wegovy and Foundayo labels all state that hair loss was associated with weight reduction. In Zepbound’s trials, no one taking the drug stopped treatment because of hair loss. Ozempic (for type 2 diabetes) lists alopecia among reactions reported after approval.
A study in The BMJ, reported July 22, 2026, used Penn Medicine health records for adults with type 2 diabetes. People starting a GLP-1 had a higher risk of clinically recorded hair loss than those starting SGLT-2 inhibitors (hazard ratio 1.37) or DPP-4 inhibitors (1.68). Absolute rates were low—about 6.9 vs 5.0 cases per 1,000 person-years in one comparison. The increase was mainly non-scarring hair loss, the type typically triggered by rapid weight loss and usually reversible. The authors suggested hair loss may reflect the downstream effects of metabolic change rather than a direct drug effect.
The American Academy of Dermatology says excessive shedding—called telogen effluvium—is common after stressors including losing 20 pounds or more, giving birth, illness or surgery. Most people notice it a few months after the trigger. It’s typically temporary: as the body readjusts, shedding stops, and hair tends to regain normal fullness within six to nine months. Eating much less can also lower intake of protein, iron, zinc and other nutrients; the 2025 joint advisory lists excessive hair loss among signs of possible nutrient deficiency.
Shedding linked to weight loss is usually temporary, according to the AAD and the BMJ authors. But hair loss has many causes, and the BMJ study also found a small signal for scarring hair loss compared with one drug class. If your hair isn’t recovering, get it checked rather than assuming it’s the medication.
| Stage | What the AAD describes |
|---|---|
| Trigger | A stressor such as losing 20 pounds or more |
| Onset | Shedding usually noticed a few months after the trigger |
| Recovery | Shedding stops as the body readjusts; hair tends to regain normal fullness within 6–9 months |
| If the stressor continues | Shedding can last longer |
The BMJ authors suggested clinicians watch for hair loss particularly in the first year of GLP-1 treatment.
Yes. The AAD lists other common triggers of excessive shedding, including giving birth, a lot of stress, a high fever, an operation, recovering from an illness, and stopping birth-control pills. Thinning that runs in families (pattern hair loss), thyroid problems and low iron are other causes a clinician may check. The 2025 joint advisory lists excessive hair loss among possible signs of nutrient deficiency, alongside unusual fatigue, muscle weakness and poor wound healing—worth mentioning to your prescriber if you notice several together.
In Zepbound’s weight-management trials, hair loss was reported by 4–5% of people on the drug vs 1% on placebo. It was more frequent in women (7.1%) than men (0.5%), and the label says it was associated with weight reduction.
Shedding triggered by rapid weight loss (telogen effluvium) is usually temporary. The American Academy of Dermatology says hair tends to regain normal fullness within six to nine months once the trigger passes. See a doctor if it doesn’t.
Getting enough protein and nutrients helps your body cope with weight loss, and low iron or other deficiencies can contribute to shedding. Ask your clinician about labs and whether a supplement makes sense; no supplement is proven to prevent GLP-1-related shedding.
The labels report similar low rates: 4–5% on Zepbound vs 1% on placebo, and 3.3% on Wegovy 2.4 mg vs 1% on placebo (5.8% on Wegovy HD 7.2 mg). These come from separate trials, so they can’t be compared directly. Both are higher in women.
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Why it helps on a GLP-1: Hair shedding during rapid weight loss is reported on GLP-1 labels and is often temporary—talk to your doctor before starting a hair-loss treatment.
Widely available multivitamins and single nutrients, many USP-verified.
Why it helps on a GLP-1: Eating much less can leave nutrient gaps; nutrition experts advise watching for deficiencies. Ask your clinician if a multivitamin makes sense for you.
Ready-to-drink shakes with 30g protein and about 1g sugar per bottle.
Why it helps on a GLP-1: When appetite is low, a cold shake is an easy way to get a big chunk of protein without a full meal.
Detailed nutrition tracker covering macros plus vitamins and minerals.
Why it helps on a GLP-1: Shows micronutrients, which matters when you're eating much less food overall.
Browse related categories: 🌿 Side effects 🥤 Protein
How much GLP-1 weight loss is lean mass, and the two main defenses—protein and strength training—with targets from a 2025 expert advisory and the CDC.
Read the guide →Food & proteinA realistic high-protein day of eating on a GLP-1: small meals, about 90 g protein, fiber and fluids, plus foods that tend to ease nausea. Sources cited.
Read the guide →Getting startedA practical, no-dosing checklist for your first month on Zepbound, Wegovy, Ozempic, Mounjaro or a GLP-1 pill: questions, cost, food, side effects.
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