Hair loss doesn’t appear as a side effect on Ozempic’s® label. Yet it’s one of the most common concerns women raise with their doctors about glucagon-like peptide-1 (GLP-1) medications. Users have reported over 1,000 cases of hair loss to the U.S. Food and Drug Administration (FDA), and the American Academy of Dermatology now includes GLP-1-related hair changes in their guidance for patients.

So does Ozempic actually cause hair loss? This guide explains what the latest research shows and what you can do about any thinning you’re experiencing.

Is hair loss a side effect of Ozempic? What the research says about GLP-1 medications

The strongest evidence linking GLP-1 treatment and hair loss comes from a clinical trial of the drug Wegovy®. This medication uses higher doses of the same active ingredient as Ozempic, semaglutide. The study found that 3% of people taking the 2.4 mg dose of Wegovy reported hair loss, compared to only 1% on a placebo. 

Research has struggled to link semaglutide and hair loss definitively, though studies have said that the number of people reporting it certainly deserves attention.

Can GLP-1s cause hair loss? Why it might be happening

It’s important to remember that people who specifically took Ozempic® during the drug’s original trials didn’t flag hair loss as a notable side effect. 

Many people still report hair loss while taking GLP-1 medications, though. Here are a few reasons this might happen:

• Temporary shedding: Your hair has three growth stages—growth, resting, and shedding. Normally, only around 5% of your hair is in the shedding phase. But when you’re stressed or going through a big change like rapid weight loss, up to 70% of your hair can start shedding too early. This condition is called telogen effluvium. Shedding usually starts around one month after you start losing weight and lasts an average of five months. But because hair follicles aren’t actually damaged, new growth typically picks back up once your body adjusts.
• Nutritional gaps: GLP-1 medications mute your appetite, making it harder to eat enough of the nutrients like protein and iron that hair needs to grow. This is especially relevant for women since blood loss during the menstrual cycle already reduces their iron levels.
• Hormonal changes: Estrogen helps keep hair follicles in their growth phase for longer. As hormone levels drop during perimenopause, hair thins and sheds more easily. 
• Underlying conditions: Shedding can sometimes happen because of a totally different issue. For instance, conditions like an underactive thyroid or polyendocrine metabolic ovarian syndrome (PMOS) can disrupt your hormones and cause thinning that looks a lot like weight-loss-related hair loss.

How can you reduce the risk of hair loss while on GLP-1 medications?

You can’t predict whether you’ll experience shedding during rapid weight loss, but there are steps you can take to protect your hair. 

Get enough protein

One of the primary ingredients of hair is keratin, a protein your body makes from the amino acids in food. But since GLP-1 medications lower your appetite, it can be tough to eat enough protein, which can impact hair health. Aim for 80–120 grams of protein each day.

Focus on iron and zinc 

There’s a correlation between women with hair loss and those with iron, vitamin D, and zinc deficiencies. Make sure that alongside protein, you’re also getting enough of these nutrients in your diet. Dark leafy greens, legumes, and seafood are good options.

Check your blood levels before turning to supplements

Lots of people turn to biotin supplements to support hair growth, but research shows they won’t do much unless you have a biotin deficiency. Before relying on these supplements, ask your provider to run your blood work. They can check for underlying concerns with your thyroid, hormones, and nutrients. 

Talk to your prescriber about pacing your weight loss

Clinical trials show a clear pattern: The faster and more dramatic the weight loss, the higher the shedding risk. If hair changes concern you, speak to your provider about adjusting your dose so you lose weight more gradually.

How can you manage hair loss if it’s already happening?

If shedding has already started, here are a few things to discuss with your healthcare provider:

• Lab-guided nutritional correction: Instead of guessing which nutrients you’re low on, your provider can check your levels and suggest diet adjustments and supplements. Research shows that taking supplements in response to your test results means treatments are more timely and targeted to your needs.
• Topical minoxidil: This over-the-counter treatment helps extend the hair regrowth phase, and many women use it to treat hair loss. The FDA has approved two formulas: a 2% and a 5% dose. Evidence suggests that the 5% formula is more effective, but it also comes with a higher chance of causing facial hair growth.
• Options for persistent thinning: If you’ve been experiencing shedding for more than six months, this may indicate female pattern hair loss. In this case, your provider may recommend spironolactone or low-dose oral minoxidil. These are prescription treatments that require close monitoring, so always speak to your doctor before starting them.

Remember: Don’t stop your GLP-1 medication to try to reverse any shedding. When hair loss is due to weight change, stopping your treatment won’t speed up hair regrowth but may undo your health progress.

When should you talk to a specialist about hair thinning?

For most women, shedding slows on its own within a few months, but some signs indicate it’s time for a closer look. A dermatologist can use scalp imaging and targeted blood work to pinpoint what’s driving the thinning and whether it needs treatment beyond nutritional support, such as hormone therapy for hair loss.

Speak to your doctor if you experience the following:

• Persistent shedding: Hair loss that hasn’t slowed six months after your weight levels off can be a sign of female pattern hair loss.
• Concentrated hair loss: A widening hair part or thinning concentrated at the crown may be another sign of female pattern hair loss.
• Scalp issues: Scalp redness, pain, or scarring usually suggest hair loss is due to factors other than weight loss and should be investigated.

Supporting your whole health on GLP-1s with Maven Clinic

Regardless of whether you take GLP-1 medication like Ozempic®, hair thinning can be unsettling. But for most women, it’s temporary and manageable with the right support. 

Maven Clinic is here to help women with all aspects of their health. Our GLP-1 Care program gives you access to providers who specialize in women’s metabolic health. From creating nutrition plans to managing GLP-1 side effects, your care team works with you through every stage, so concerns like hair thinning get addressed early.

Connect with a Maven Clinic specialist to build a GLP-1 care plan that supports your whole health.

FAQ

Is hair loss from Ozempic® permanent?

No. The most common type of hair loss linked to GLP-1 medications is a temporary type of shedding called telogen effluvium. Significant changes to the body, including rapid weight loss, can cause this shedding. 

Once your weight stabilizes and your nutrition catches up, regrowth typically begins within three to six months. However, the shedding can reveal an underlying pattern that won’t resolve on its own, like female pattern hair loss. A provider can help you figure out which type of hair loss you’re dealing with and whether it needs targeted treatment.

Does Wegovy® or Mounjaro® also cause hair loss?

Yes, hair loss has been reported with both. Wegovy® uses the same active ingredient as Ozempic® (semaglutide) at a higher dose. Its clinical trial found that about 3% of participants experienced hair loss compared to 1% on placebo. 

Mounjaro® and Zepbound® (tirzepatide) show a similar pattern. In the SURMOUNT-1 trial, hair loss ranged from about 3% to nearly 6%. The trigger appears to be the same: hair loss from GLP-1s is tied to rapid weight loss, not the specific drug.

Can eating more protein help prevent hair loss on GLP-1 medications?

It might. Your hair depends on your protein intake to build keratin, and when GLP-1 medications mute your appetite, protein intake often drops before you realize it. Aiming for 80–120 grams of protein each day gives your follicles the building blocks they need. 

That said, protein alone won’t prevent shedding if other nutrients—like iron, zinc, or vitamin D—are also low. A well-rounded approach to nutrition, ideally guided by blood work, gives your hair the best chance.