Ozempic hair loss: causes and treatment

Ozempic (semaglutide), a medication approved by the US Food and Drug Administration (FDA) for type 2 diabetes, does not directly cause hair loss. However, weight loss supported by Ozempic may be linked to temporary hair shedding, called telogen effluvium (TE). Common Ozempic side effects include nausea and constipation.

Ozempic does not directly cause hair loss. But Ozempic supports weight loss, and rapid or significant weight loss may trigger a type of temporary hair shedding known as telogen effluvium (TE).

Hair loss

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Hair grows in a cycle, passing through several phases as it grows and is later shed. Ozempic-related physical changes, such as weight loss, nutritional deficiencies, and other factors can disrupt this cycle, potentially triggering hair loss.

Here’s what to keep in mind about Ozempic and hair loss.

Weight loss

Ozempic is usually prescribed to regulate blood sugar, but it also causes weight loss by reducing appetite and slowing gastric emptying. Rapid or significant weight loss may trigger telogen effluvium (TE), a type of hair loss. In fact, the American Academy of Dermatology (AAD) lists losing 20 or more pounds as a known trigger for excessive hair shedding.

TE causes significant hair shedding from the entire scalp a few months after a stressful event. Weight loss may not feel stressful psychologically, but significant physical changes can be stressful for the body. If you lose a significant amount of weight after starting Ozempic, you may also experience hair loss. The good news is that it's temporary.

Nutritional deficiencies

GLP-1 medications like Ozempic reduce appetite and slow digestion, which often means eating less overall. That can be a benefit if you're trying to lose weight, but it can also lead to nutritional deficiencies if you're not intentional about filling your plate with nutrient-dense foods.

About one in five adults develops a nutritional deficiency within a year of starting a GLP-1. Several vitamin deficiencies are also linked to hair loss. If you're concerned about hair loss while taking Ozempic, be sure to get enough iron, vitamin D, zinc, and B12. 

Type 2 diabetes 

Many people are prescribed Ozempic to help manage type 2 diabetes. Research suggests that people with type 2 diabetes have a higher-than-average risk of hair loss, specifically hair thinning at the crown of the head. The exact cause of diabetes-related hair loss is not clear, but it may be because blood vessel damage from high blood sugar can impair blood flow to the hair follicles. Also, insulin resistance may affect hormones involved in hair loss. Ozempic is effective for lowering blood sugar, but hair thinning may still occur if the follicles were already damaged.

The exact number of people who experience hair loss with Ozempic is unknown. Existing data suggest that while hair loss on Ozempic does happen, it is not common.

Here's what the numbers say:

• Clinical trial data did not identify hair loss as a side effect of Ozempic.

• About 3%–6% of clinical trial participants taking Wegovy (semaglutide) experienced hair loss, according to trial data. (Wegovy contains the same active ingredient as Ozempic, but the Wegovy dosage is higher and is approved for weight loss.)

• In a study using reports from multiple countries, researchers did not find strong evidence linking GLP-1 medications to hair loss. However, compared with some other diabetes medications, GLP-1s overall had more reports of hair loss.

• Between 2018 and 2025, 570 people reported experiencing hair loss while taking Ozempic, according to the FDA Adverse Event Reporting System (FAERS).

Hair loss may be more common with higher doses of semaglutide, possibly due to greater weight loss seen at higher doses. In Wegovy’s clinical trials, hair loss was reported more often with the higher 7.2 mg dose than with a lower dose or placebo:

• Hair loss was reported in 5.8% of people taking the 7.2 mg dose, compared with 3.3% taking the 2.4 mg dose and 1% with placebo.

• Rates of hair loss were higher among women: 8.4% with the 7.2 mg dose and 5.4% with the 2.4 mg dose. Among men, hair loss was reported in 0.2% taking 7.2 mg and none taking 2.4 mg or placebo.

In the 7.2 mg group, a small number of participants lowered their dose, paused treatment, or stopped Wegovy because of hair loss. No participants in the 2.4 mg or placebo groups needed to change or stop treatment for this reason. 

Always check with your healthcare provider before stopping or changing your medication.

Whether hair loss on Ozempic is temporary depends on the underlying cause.

Telogen effluvium

Hair loss after weight loss or a stressful event is called telogen effluvium (TE), and it is temporary.

TE is sudden, excessive shedding caused by a specific trigger such as physical illness, psychological trauma or stress, or major physical changes like weight loss or surgery recovery. Whatever the specific event, the hair follicles suddenly transition from a growth phase to a shedding phase.

The result is significant hair loss all at once. The good news is that TE typically resolves after six months, and the hair usually grows back on its own.

Other forms of hair loss

If a nutritional deficiency or high blood sugar is to blame, the hair loss should stop once the underlying problem is addressed. It is important to consult a healthcare provider if an underlying issue may be causing hair shedding or thinning. A simple blood test can help determine whether a vitamin deficiency has developed or whether blood sugar is still not under control.

Hair loss may be completely unrelated to weight loss, nutritional deficiencies, stress, or diabetes. Bald patches or clumpy hair loss, rather than overall hair thinning, may point to alopecia areata, an autoimmune disorder that causes hair loss from the scalp, face, and body. Talk to a healthcare provider if you are losing clumps of hair. In that case, the timing of hair loss while on Ozempic may be coincidental.

If you experience hair loss at any point while taking Ozempic, your first step should be to notify your healthcare provider. They can help you figure out whether your calorie intake is too low, whether you are deficient in a key vitamin or mineral, or whether this is simply your body's temporary response to weight loss.

Here's how to treat or manage hair loss while working with your healthcare provider to pinpoint the cause.

Eat a balanced diet

Ozempic reduces appetite and slows digestion, which often means eating smaller amounts overall. It is important to pay attention to whether the food you do eat has all the nutrients your body needs.

Ensure you are consuming enough protein, which is the building block for healthy hair. Also, aim for foods rich in key nutrients, such as iron, zinc, and vitamin B12.

Take your vitamins (if needed)

If you are getting all the nutrients you need from the food you eat, you may not need vitamins or supplements. However, if there is a chance you are not eating enough to supply your body with all the necessary nutrients, consider consulting your healthcare provider about testing for nutrient deficiencies, as low levels of certain vitamins and minerals, including iron, zinc, and vitamin D, have been linked to hair loss and shedding.

If a deficiency is found, take your supplements consistently as directed. It may take several months to notice a change, but correcting a deficiency should reset hair growth.

Consider a lower dose

Slow and steady weight loss is less likely to trigger TE than rapid, dramatic changes in weight. So if you are dropping weight quickly on Ozempic, consider talking to your healthcare provider about a lower dose. It is important to keep your healthcare provider in the loop about how you are feeling on Ozempic to make sure you are on a dose that is high enough to be effective but low enough to minimize side effects.

Be patient

Losing handfuls of hair in the shower can be alarming. If your hair loss began within months of starting Ozempic, you are likely experiencing temporary hair loss. TE is distressing, but it is short-lived and usually resolves on its own. Give it a few months to see if the shedding starts to stabilize and stop.

It is always okay to ask a healthcare provider for personalized feedback on Ozempic and hair loss. If you are concerned about nutritional deficiencies or an underlying health issue, a healthcare provider can help identify the problem. In some cases, they may suggest a lower dose.

Talk to your provider about hair loss treatments 

If you are still experiencing significant hair loss after addressing any deficiencies and waiting a few months, consider consulting a dermatologist. After assessing your scalp and situation, a dermatologist may recommend topical or oral minoxidil to encourage hair growth. Finasteride can also help, depending on the cause of hair loss.

Hair starts growing back 3-6 months after a triggering event or correction of any underlying issues. You can expect to notice significant regrowth within 12 months.

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Hair loss is not a direct side effect of Ozempic; however, some people may notice hair shedding and thinning after losing weight on this medication. This hair loss is usually a side effect of weight loss or nutrient deficits, not the medication itself. Here are the key things to know about Ozempic and hair loss:

• Rapid weight loss is a common cause of telogen effluvium (TE). TE is a temporary type of hair loss characterized by excessive shedding from all over the scalp. This is the most likely cause of Ozempic-related hair loss.

• Nutritional deficiencies can also cause hair loss. Since Ozempic reduces appetite, you may not be getting enough iron and B vitamins while on this medication. Developing a deficiency can lead to hair loss.

• People with type 2 diabetes are more prone to hair loss than people without this condition. Hair loss on Ozempic may be due to an underlying diabetes diagnosis rather than the medication.

• There are things you can do to help prevent Ozempic-related hair loss. Eat a nutrient-rich diet, manage your blood sugar, and stay connected with a healthcare professional who can help you stay on top of your health.

• Hair loss from TE typically resolves on its own. If you are still experiencing excessive hair shedding and thinning three months after your weight stabilizes on Ozempic, talk to your healthcare provider about testing for other causes.