The Wegovy label reports hair loss in 3% of patients versus 1% on placebo, listed as an adverse reaction (Section 6.1) — not as a warning. The label states plainly that the hair loss "was associated with weight reduction." The shedding some people notice on GLP-1 medicines is usually telogen effluvium, temporary shedding that follows rapid weight loss rather than damage to hair follicles. It typically starts two to four months after the fastest weight loss, and the American Academy of Dermatology puts recovery at six to nine months once the trigger settles.
What the Wegovy label says
The Wegovy label reports hair loss in 3% of patients versus 1% on placebo, listed as an adverse reaction (Section 6.1) — not as a warning. The label states plainly that the hair loss "was associated with weight reduction."
By sex: 4% of women versus 0.9% of men in the pooled trials — the sex difference is large and consistent across the class.
Wegovy shows a genuine dose-response within its own trials: 1% on placebo, 3% at the 2.4 mg dose, and 6% at the newer 7.2 mg dose. That pattern — more weight loss, more shedding — is the strongest single piece of evidence that the weight loss, not the molecule, is the driver.
Hair loss is listed as an adverse reaction, never as a boxed or Section 5 warning, for any drug in this class.
Why it happens, when it stops, why some people say it never grew back, what helps (and why biotin can interfere with lab tests), and when shedding points to something else are covered once for all GLP-1 medicines: GLP-1 hair loss and what helps with GLP-1 hair loss.
Common questions
Does Wegovy cause hair loss?
The Wegovy label reports hair loss in 3% of patients versus 1% on placebo, listed as an adverse reaction (Section 6.1) — not as a warning. The label states plainly that the hair loss "was associated with weight reduction."
Does biotin help hair loss on Wegovy?
Evidence does not support biotin unless you are genuinely deficient, which is rare. The FDA also warns that biotin interferes with lab tests, including troponin, where it can produce a falsely low result and mask a heart attack. Test before supplementing.