I work with many women who are taking a GLP-1 medication, and one of the worries I hear most often is about their hair. “I feel like I'm losing my hair.” Or, before they've even started the medication I hear: “I've heard people lose hair on these medications, and I don't want that to happen to me.”
My short answer is that it can happen. But with the right nutrition support, most people can keep shedding to a minimum, and when it does happen, it's temporary. Your hair grows back.
Here's what's behind the hair loss for individuals on a GLP-1, and the steps I use with clients to protect their hair while they lose weight.
Why Hair Shedding Happens
GLP-1 medications quiet appetite so effectively that it becomes easy to eat too little protein and too few vitamins and minerals without noticing. Rapid, deep drops in calories are the main trigger for a type of temporary shedding called telogen effluvium.
Here's how it works. Each hair follicle cycles between a growing phase and a resting phase. A sudden stress on the body, including fast weight loss or a drop in key nutrients, can push more follicles into the resting phase at the same time. Those hairs then fall out together, usually two to four months later. That delay is why shedding often shows up well after someone starts the medication or increases their dose, and why it can feel so unexpected.
A large 2026 study in The BMJ followed tens of thousands of adults with type 2 diabetes and found that people starting a GLP-1 medication were more likely to be diagnosed with hair loss than people starting other diabetes medications. The overall risk stayed low, about 7 cases per 1,000 people each year, and the researchers point to rapid weight loss and related drops in nutrients like iron and zinc as likely contributors.
The reassuring part: this type of shedding is almost always temporary. It usually settles within three to six months once weight stabilizes and nutrition is on solid ground, and stopping the medication usually isn't necessary.
Protecting Your Hair While You Lose Weight
These are the five key steps I work with my GLP-1 clients on that help protect your hair, and they also protect the muscle and energy you want to keep while the weight comes off.
1. Put protein first at every meal
Current GLP-1 nutrition guidance recommends about 1.0 to 1.5 grams of protein per kilogram of body weight each day. I work with clients to set the exact number they need, often using an “adjusted” weight rather than your scale weight, since scale weight can overestimate protein needs when there's more weight to lose. For many people, that works out to roughly 100 grams a day (give or take 20g). If shedding has already started, some dermatology experts suggest aiming a little higher.
• Eat protein first. Start each meal with your protein, before the carbs and vegetables, so you get it in before you feel full.
• Spread it out. Aim for 20 to 30 grams at each meal or snack rather than saving most of it for dinner. Your muscles use protein best when it comes in steady amounts through the day.
• Keep an easy backup. On low-appetite days, a shake or bar with at least 20 grams of protein counts.
2. Protect the nutrients your hair depends on
When you eat less overall, several nutrients tend to drop along with calories. A 2025 joint advisory from four leading obesity and nutrition organizations flags these as nutrients of concern for people on GLP-1 medications, and lists excessive hair loss as one sign of deficiency.
• Iron. This is the nutrient I watch most closely for hair. Research after weight-loss surgery points to iron as the strongest nutritional predictor of shedding, and low iron stores are linked with shedding in women. Good sources of iron include lean red meat, chicken, fish, shellfish, eggs, lentils, beans, tofu, spinach, and fortified cereal. Pair plant sources with vitamin C (peppers, citrus, strawberries, tomatoes) to help your body absorb more.
• Zinc. Meat, shellfish (especially oysters), pumpkin seeds, cashews, chickpeas, and yogurt.
• Folate. Lentils, beans, leafy greens, asparagus, avocado, oranges, and fortified grains.
• Vitamin B12. Fish, eggs, dairy, and meat, or fortified nutritional yeast and cereal if you eat mostly plants.
• Vitamin D. Salmon, sardines, egg yolks, and fortified milk or yogurt. Low vitamin D is common and is linked with shedding, and many people need a supplement (more on that below).
• Calcium and magnesium. Dairy or fortified alternatives, yogurt, tofu, almonds, seeds, and leafy greens.
Make sure you add variety (don’t eat the same things day after day). Rotate between animal proteins, beans and lentils, and nuts and seeds, and vary your vegetables and fruits week to week rather than relying on the same few favorites. If this feels complicated, reach out to me as this is the work I do with clients every day and often a simple meal plan customized to your tastes, lifestyle and nutrient needs makes eating much easier!
3. Eat small, steady meals
With a smaller appetite, five or six small meals are often easier than three larger ones. Here's what a day might look like. Portions are small on purpose to match a quieter appetite.
Breakfast
2 eggs with spinach, whole-grain toast, orange slices
~14 g protein; iron, folate, B12, vitamin C
Mid-morning
¾ cup Greek yogurt with pumpkin seeds and berries
~18 g protein; zinc, calcium, magnesium
Lunch
Lentil and chickpea salad with peppers, tomato, and olive oil
~15 g protein; iron, folate, zinc, vitamin C
Afternoon
Cottage cheese or a 20 g protein shake, plus a small handful of cashews or almonds
~20 g protein; calcium, magnesium, zinc
Dinner
Palm-size salmon or chicken, quinoa, roasted asparagus or broccoli
~25–30 g protein; vitamin D, iron, folate, B12
Optional evening
Edamame, or a whole-grain cracker with nut butter
~8–10 g protein; folate, magnesium
That adds up to roughly 100 grams of protein across the day, without any single meal feeling heavy.
Easy swaps to rotate: salmon, sardines, or tofu; lentils, black beans, or edamame; pumpkin seeds, cashews, or almonds; spinach, kale, or asparagus. Rotating keeps iron, zinc, and folate coming from several directions.
4. Don't cut too hard, and keep lifting
Losing weight very quickly while eating very little is what stresses hair follicles, and it takes muscle along with fat.
• Aim for a steady, moderate pace. Slowing rapid weight loss is one of the strategies experts recommend for GLP-1-related shedding. If you notice shedding or fatigue, treat it as a cue that the deficit may be too deep, and talk with your prescriber about easing the pace or slowing dose increases.
• Keep calories high enough to support your nutrition. Very low intakes, under about 1,200 calories a day for women or 1,800 for men, make nutrient deficiencies much more likely.
• Strength train two to three times a week. Protein alone won't preserve muscle. Make strength training a priority.
• Stay hydrated. Around 2 to 3 liters of fluid a day, mostly water, is a good general target unless your doctor has given you a different one.
5. Know when to talk with your doctor
• Iron testing (ferritin). Ask for a blood test if you have ongoing shedding, fatigue, heavy periods (common in perimenopause), a history of low iron, or if you eat little meat. Please don't start iron supplements on your own. Too much iron is harmful, so supplement only if testing shows you need it.
• Vitamin D. Ask whether your level should be checked. A supplement is often recommended if it's low, but the evidence for vitamin D as a hair treatment on its own is limited, so test first.
• A daily multivitamin and mineral. One with zinc, B12, and folate is a reasonable safety net while appetite is low. Many formulas for women over 50 leave out iron, which is often appropriate after menopause, so confirm the right choice before you start taking one.
• “Hair” supplements. Be cautious. The evidence for most is limited, and high-dose biotin can interfere with some lab tests, including thyroid tests.
• Thyroid medication. If you take it, your dose may need adjusting as you lose weight. Mention any new hair loss.
• Minoxidil and a dermatology visit. If shedding is significant, persistent, or distressing, ask your doctor or a dermatologist about low-dose minoxidil, which can support regrowth. It's also worth a dermatology visit if hair loss is patchy, comes with a scaly or scarring scalp, or hasn't improved after three to six months of steady weight and good nutrition.
My Bottom Line
Hair shedding on a GLP-1 is common enough to plan for, and in most cases it can be prevented or kept to a minimum. Put protein first at every meal, protect iron, zinc, folate, B12, and vitamin D, eat small and steady meals, lose weight at a moderate pace, and keep lifting.
And if shedding does start, take a breath. It's temporary, it grows back once your weight settles and your nutrition is on track, and stopping your medication usually isn't necessary.
If you're on a GLP-1 or thinking about starting one, this is where personalized nutrition support makes a difference. I help women build a plan that fits a smaller appetite, protects their muscle, hair, and energy, and keeps weight loss steady and sustainable. If you'd like some support along the way, I'd love to hear from you.
Cristen Benz, MS, RDN is a registered dietitian in private practice at Benz Wellness in Fort Collins, Colorado. She specializes in GLP-1 success, weight loss, women’s health, gut health, and autoimmune conditions. She works individually with clients to build practical, customized ways of eating that fit real life. She also works with organizations to provide resources and guidance so employees are more productive, focused, and feeling healthy. Learn more at benzwellness.com.
References:
1. Nutritional Priorities to Support GLP-1 Therapy for Obesity: A Joint Advisory From the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association, and the Obesity Society. The American Journal of Clinical Nutrition. 2025. Mozaffarian D, Agarwal M, Aggarwal M, et al. Guideline
2. I Am Taking a GLP-1 Weight-Loss Medication—What Should I Know? JAMA Internal Medicine. 2025. Mehrtash F, Dushay J, Manson JE. Clinical Reference
3. Hair and Scalp Effects of GLP-1 Receptor Agonists in Practice. Clinics in Dermatology. 2026. Bridges AG, Jackson T.
4. Risk of Hair Loss Associated With Glucagon-Like Peptide-1 Receptor Agonists in Adults With Type 2 Diabetes: Target Trial Emulation. BMJ. 2026. Tang H, Zhang B, Lu Y, et al.
5. The Impact of GLP-1 Receptor Agonists on Hair: Beneficial Effects or Adverse Outcomes? American Journal of Clinical Dermatology. 2026. Seyed Jafari SM, Caro G, Lipner SR, Iorizzo M. Review
6. Bridging the Nutrition Guidance Gap for GLP-1 Receptor Agonist Therapy Assisted Weight Loss: Lessons From Bariatric Surgery. International Journal of Obesity. 2026. Spreckley M, Ruggiero CF, Brown A. Review
7. Risk of Protein Intake Deficiency During Treatment With GLP-1 and GIP/GLP-1 Receptor Agonists: Considerations for Secondary Sarcopenia. Advances in Therapy. 2026. Prokopidis K, Cacciatore S, Anton SD, Batsis JA. Review
8. Comparative Analysis of Postoperative Hair Loss and Micronutrient Deficiencies After One-Anastomosis Gastric Bypass Versus Sleeve Gastrectomy. Obesity Surgery. 2026. Chinisaz F, Maleki T, Najjari K, Miratashi Yazdi SA.
9. Vitamin and Mineral Deficiencies in Patients With Telogen Effluvium: A Retrospective Cross-Sectional Study. Journal of Drugs in Dermatology. 2016. Cheung EJ, Sink JR, English JC III.
10. Serum Ferritin and Vitamin D in Female Hair Loss: Do They Play a Role? Skin Pharmacology and Physiology. 2013. Rasheed H, Mahgoub D, Hegazy R, et al.
11. Diagnosis and Treatment of Nonscarring Hair Loss in Primary Care in 2021. The Journal of the American Medical Association. 2021. Mirmirani P, Fu J. Review
12. Evaluation of the Safety and Effectiveness of Nutritional Supplements for Treating Hair Loss: A Systematic Review. JAMA Dermatology. 2023. Drake L, Reyes-Hadsall S, Martinez J, et al. SR
