GLP-1 Hair Loss: Why Hair Sheds on Semaglutide or Tirzepatide
Last reviewed: October 6, 2026. This page is educational, not medical or legal advice. See our medical disclaimer.
Hair shedding has been reported in trials of FDA-approved Wegovy and Zepbound, and those labels list hair loss as an adverse reaction. Those label data do not describe compounded semaglutide or compounded tirzepatide, which are not FDA-approved and were not studied in those trials. A leading explanation is telogen effluvium, a temporary shedding pattern that can follow a significant physical stressor such as rapid weight loss or reduced intake. Whether these medicines affect hair follicles directly is not established. Your clinician, not a guess, decides what is behind your shedding.
Sources include the current FDA prescribing information for Wegovy and Zepbound (via DailyMed) and American Academy of Dermatology patient guidance on hair shedding.
Does semaglutide or tirzepatide cause hair loss?
It can be part of the picture. Hair loss appears in the FDA prescribing information for Wegovy (semaglutide) and Zepbound (tirzepatide), and both labels describe it as associated with weight reduction.
Whether GLP-1 medicines have any direct effect on hair follicles is not established. Observational studies have reported associations, but that kind of study can't prove cause. What we can say is that the shedding tends to follow substantial weight loss, much like it does after other big changes to the body.
How common is hair loss on Wegovy and Zepbound?
Not rare, but not the majority either. Here is what the current labels report from the weight-management trials of these FDA-approved brand products.
| Hair loss on the medicine | Hair loss on placebo | |
|---|---|---|
| Wegovy (semaglutide 2.4 mg injection), adults | 3.3% | 1.0% |
| Wegovy 2.4 mg, women | 4% | 2% |
| Wegovy 2.4 mg, men | 0.9% | 0% |
| Wegovy 7.2 mg injection, adults | 5.8% | 1.0% |
| Wegovy, pediatric trial | 4% | 0% |
| Zepbound (tirzepatide) 5 mg | 5% | 1% |
| Zepbound 10 mg | 4% | 1% |
| Zepbound 15 mg | 5% | 1% |
| Zepbound, women | 7.1% | 1.3% |
| Zepbound, men | 0.5% | 0% |
Sources: FDA-approved prescribing information for Wegovy (DailyMed label published June 30, 2026) and Zepbound (DailyMed label published September 2, 2026). These figures are from trials of the FDA-approved brand products and do not describe compounded medications.
Does it happen more in women?
In the Zepbound label, hair loss was reported more often in women than in men, as the table shows, and the Wegovy figures show the same split. In the Wegovy 7.2 mg trials, hair loss was reported in 8.4% of women and 0.2% of men on that dose. No Zepbound patients in those trials stopped treatment because of hair loss.
What about Ozempic and Mounjaro?
The type 2 diabetes labels for Ozempic and Mounjaro list alopecia under postmarketing experience. Those reports are voluntary, so the label says frequency and cause can't be reliably established.
What about compounded versions?
These numbers come from trials of the FDA-approved brand products. Compounded semaglutide and tirzepatide are not FDA-approved, are not reviewed by FDA for safety, effectiveness or quality, and were not studied in those trials, so the label data does not describe them. For how the two paths differ, see compounded vs. brand-name GLP-1.
Why does hair shed on a GLP-1?
A leading explanation is telogen effluvium, a temporary shedding pattern that can follow a significant physical stressor such as rapid weight loss or reduced intake. The American Academy of Dermatology says it is normal to shed 50 to 100 hairs a day. Excessive shedding is common after a stressor on the body, including losing 20 pounds or more, illness, surgery, high fever, giving birth, or major stress.
On a GLP-1, two things can stack up: fast weight loss and eating much less, including less protein. Either can be enough to push more hairs into the shedding phase at once.
Shedding is not the same as hair loss
Shedding means hairs fall out faster than usual. Hair loss in the AAD's sense means something is stopping growth, such as hereditary hair loss, immune causes, or some drugs. A big shed can also make existing pattern hair loss more noticeable. That is one reason a clinician looks at the whole picture.
When does it start, and is it permanent?
The AAD says most people notice telogen effluvium a few months after the triggering event. It is usually temporary. As the body readjusts, the shedding stops, and within six to nine months hair tends to regain normal fullness.
If the stressor continues, shedding can last longer. We can't give you an exact timeline for your own hair. If shedding goes well past about six months or keeps getting worse, that is worth raising with your clinician.
What can you do if your hair is shedding on a GLP-1?
Ask about protein and overall nutrition
When you eat less, it is easy to fall short on protein and everything else. Clinicians commonly look at this first. Ask what amount and mix fits you, rather than copying a number from the internet.
Ask which labs make sense
Clinicians commonly consider ferritin (your iron stores), thyroid function (TSH), and vitamin D. Low iron and thyroid changes are other things that can affect hair, and they can be checked.
The Refuvia Baseline Panel is $199 one time and includes ferritin, iron and TIBC, vitamin D, and TSH, drawn at a local lab. A physician reviews the results. Medical care is provided by independent licensed clinicians with HLY Medical Group PA, and Refuvia provides nonclinical marketing and administrative support only. A prescription is never guaranteed, and availability varies by state.
Talk through pace and dose
How fast you are losing weight, and any recent dose changes, may matter. Those decisions belong to your clinician. If you are on a Refuvia program, see weight loss, semaglutide, or tirzepatide, or read how it works.
Rule out other causes
Pattern hair loss, postpartum shedding, other medications, and recent illness can all look similar. If a clinician thinks pattern hair loss is also involved, our hair loss page explains that separate evaluation. Telogen effluvium usually resolves on its own, and nothing there is meant to treat or prevent GLP-1 shedding.
Should I stop my medication because of shedding?
Not on your own. Stopping or changing a dose without guidance can affect your weight care in ways you didn't plan for. Tell your prescribing clinician what you are seeing. They can weigh your shedding against your goals, your pace of weight loss, and your other health factors.
When should you see a clinician or dermatologist?
Shedding without other symptoms is often not an emergency, but it is still worth telling your prescribing clinician, especially if it is persistent, worsening, or distressing. Talk to your clinician if you notice any of these:
- Patchy or bald spots
- Scalp pain, itching, redness, or scaling
- Shedding that lasts well beyond about six months, or keeps getting worse
- Loss of eyebrow or body hair
- Other symptoms, such as fatigue, feeling cold, or heavy periods
A dermatologist may be appropriate. This list is general, not diagnostic. If you ever have an emergency, call 911.
Talk with a clinician about weight care
Explore whether clinician-directed care through HLY Medical Group PA is appropriate for you. Refuvia does not diagnose, treat, or prescribe. A prescription is never guaranteed; your clinician decides.
Frequently asked questions
Is GLP-1 hair loss the same as going bald?
Usually not. Shedding after weight loss is typically temporary, while pattern hair loss is a different process. A clinician can help tell which one you are dealing with.
Will my hair grow back?
The American Academy of Dermatology says this kind of shedding usually stops as the body readjusts, and hair tends to regain normal fullness within six to nine months. If the stressor continues, it can last longer.
Does Ozempic or Mounjaro cause hair loss too?
Their labels list alopecia under postmarketing reports. Because those reports are voluntary, frequency and cause can't be reliably established.
Do compounded semaglutide and tirzepatide cause hair loss?
We don't know from label data. The trial numbers come from FDA-approved brand products, and compounded versions are not FDA-approved and were not studied in those trials. Rapid weight loss, a leading explanation for shedding, can happen on any path.
Which labs are worth asking about?
Clinicians commonly consider ferritin, thyroid function (TSH), and vitamin D. Your clinician decides which tests fit your history.
Can the Refuvia hair formula stop GLP-1 shedding?
We don't claim that. Telogen effluvium usually resolves on its own, and the hair formula is a compounded medication that is not FDA-approved, with results that vary. It is relevant only if a clinician thinks pattern hair loss is also involved.