Hair Loss on Zepbound: What the Trials Show and How to Support Your Hair

Finding more hair in your brush or shower drain after starting Zepbound can be unsettling. Hair loss is a listed side effect of the medication, and the trial data shows it affects women much more often than men. In most cases it is temporary. Here is what the research shows and what you can do to support your hair while your body adjusts.

What the Zepbound trials found

According to the Zepbound prescribing information:

• Hair loss was reported by 4% to 5% of patients taking Zepbound, compared with 1% on placebo.
• Women were affected far more often: 7.1% of women on Zepbound reported hair loss, compared with 0.5% of men. On placebo, the rates were 1.3% of women and 0% of men.

So while most people on Zepbound do not notice hair loss, roughly 1 in 14 women in the trials did.

Why it happens

Experts generally do not think tirzepatide damages hair follicles directly. The more likely cause is a common condition called telogen effluvium, a temporary increase in shedding that can follow a major stress on the body, including rapid weight loss. As Drugs.com explains, the same pattern has been seen after bariatric surgery and other fast weight loss.

Normally, most of your hair is in a growth phase at any given time. A significant stressor can push more follicles into the resting phase at once. Because of how the hair cycle works, the extra shedding usually shows up a few months after the trigger, which is why many people notice it two to four months into treatment rather than right away.

Lower food intake can add to this. When you are eating much less, it is easier to fall short on protein, iron, zinc, and other nutrients hair growth depends on.

Is it permanent?

Telogen effluvium is usually temporary. Shedding typically slows once weight stabilizes and nutrition is consistent, and regrowth follows over the next several months. Because hair grows slowly, it can take a while before you see a difference in thickness.

If your hair loss is patchy, comes with an itchy or inflamed scalp, or continues for many months, see your provider or a dermatologist. Other causes, such as thyroid changes, low iron, or genetic hair thinning, can overlap and are worth ruling out.

How to support your hair

Make protein a priority

Hair is made mostly of protein, and protein intake often drops on a GLP-1. Aim to include a protein source at every meal and snack. Our guide to how much protein you need on a GLP-1 has practical targets and ideas for small appetites.

Ask about bloodwork

Low iron stores, vitamin D, zinc, and thyroid problems can all contribute to hair shedding. Your provider can check these with a simple blood test, which is more useful than guessing with supplements.

Don't lose weight faster than you need to

Rapid weight loss is thought to be the main trigger. If shedding is significant, it is reasonable to ask your provider whether your dose escalation pace is right for you.

Be gentle with your hair

Tight hairstyles, heat styling, and harsh treatments put extra stress on hair that is already shedding. A gentler routine can help reduce breakage while you wait for regrowth.

Keep expectations realistic for supplements

Biotin is popular, but most people are not deficient in it, and it can interfere with some lab tests. Our post on biotin for hair loss covers what the research does and does not support. Supplements are most useful for filling real gaps, not as a fix on their own.

Where Alula fits

Alula is a daily drink mix designed for people on GLP-1 medications. Each stick includes 2 g of collagen peptides along with vitamin C, zinc, selenium, and biotin to support hair and skin health.* It also includes 1,500 mg of calcium HMB to support muscle retention, electrolytes, 2 g of PHGG fiber, a Bacillus coagulans probiotic (about 2 billion CFU), 250 mg of ginger root extract, and a full panel of vitamins and minerals, including vitamin D and B vitamins. It is not a hair loss treatment and does not replace adequate protein or the bloodwork mentioned above, but it can help cover several daily nutrition needs in one step. Our guide to collagen for hair and skin during weight loss explains what the research shows.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Alula is a dietary supplement, not a GLP-1 medication. Talk with your healthcare provider before starting any new supplement.

Frequently asked questions

Does Zepbound cause hair loss?

Hair loss is a listed side effect. In clinical trials, 4% to 5% of people on Zepbound reported it, compared with 1% on placebo. It is thought to be mostly related to rapid weight loss rather than a direct effect of the medication.

Why does Zepbound hair loss affect women more?

The trials showed a much higher rate in women (7.1%) than men (0.5%), but the reason is not fully understood. Women are generally more prone to telogen effluvium and to iron deficiency, which may play a role.

When does hair loss start on Zepbound?

Shedding from telogen effluvium usually appears a few months after the trigger, so many people notice it two to four months into treatment.

Will my hair grow back?

In most cases, yes. Shedding usually slows once weight and nutrition stabilize, and regrowth follows over several months. See a provider if it continues or seems unusual.