GLP-1 Medications and Hair Loss: What You Should Know

GLP-1 medications such as semaglutide and tirzepatide have become increasingly common for managing diabetes and supporting weight loss. While these medications can provide significant health benefits, some patients notice an unexpected change during their weight-loss journey: increased hair shedding.

Why Can Hair Loss Happen While Taking a GLP-1?

Hair loss has been reported in patients taking GLP-1 medications, particularly semaglutide and tirzepatide. However, researchers are still determining whether the medication itself directly affects the hair follicle or whether the hair loss is primarily related to the changes that occur with significant or rapid weight loss.

One of the most common explanations is a condition called telogen effluvium. This is a temporary form of excessive shedding that can occur when the body experiences physical stress—including rapid weight loss, illness, surgery or significant dietary changes.

With GLP-1 therapy, reduced appetite can also make it more difficult for some patients to consume adequate calories, protein and certain nutrients. These changes may contribute to hair shedding, particularly when weight is being lost quickly.

The good news? Telogen effluvium is typically temporary. Once weight and nutrition stabilize and the underlying trigger is addressed, the normal hair-growth cycle can gradually recover.

What Can You Do About Hair Loss on a GLP-1?

If you are experiencing increased shedding while taking a GLP-1 medication, don't simply assume the medication is the cause. A dermatologist can determine whether you are experiencing telogen effluvium or another type of hair loss, such as androgenetic (pattern) hair loss, which may become more noticeable during a period of increased shedding.

Maintaining adequate nutrition—particularly sufficient calories and protein—is also important during weight loss. Depending on your history and symptoms, your healthcare provider may recommend evaluating for nutritional deficiencies or other medical causes of hair loss.

Most importantly, don't discontinue a prescribed GLP-1 medication because of hair loss without speaking with the healthcare provider who prescribed it.

Can GLP-1s Affect Your Skin?

Hair isn't the only dermatologic consideration during GLP-1 therapy.

Significant weight loss can lead to loss of facial volume and increased skin laxity, sometimes informally referred to as "Ozempic face." Dry skin and changes in the appearance of the skin may also become more noticeable during weight loss. Injection-site reactions—including redness, itching or irritation—can occur as well.

Interestingly, GLP-1 therapy may have positive effects on certain inflammatory skin conditions. Emerging research suggests that improvements in weight, insulin resistance and systemic inflammation may benefit conditions such as psoriasis and hidradenitis suppurativa in some patients.

When Should a GLP-1 Patient See a Dermatology Provider?

If you're taking a GLP-1 medication and notice significant hair shedding, visible thinning, bald patches, scalp symptoms or concerning skin changes, consider scheduling an evaluation with your dermatology provider.

Hair loss has many potential causes, and identifying the correct type of hair loss early can help determine whether treatment is needed.

GLP-1 medications can be an important part of improving overall health—and your dermatology provider can help make sure your hair and skin stay healthy along the way.