No, Your Hair Isn't Falling Out Because of Semaglutide/Tirzepatide — Here's What's Really Happening
- Apr 17
- 3 min read
Hey PNW Medical Group Patients -
There is something that comes up in our clinic and in messages and texts sent directly to me or Jen.
"Daryl / Jen, I'm losing some of my hair on these medications. Should I stop?"
Let us put your mind at ease, because the answer is almost certainly not what you think.
It's Not the Medication — It's the Weight Loss
Here's the truth: Semaglutide and Tirzepatide don't attack your hair follicles.
What's actually happening has a medical name — telogen effluvium. It's a temporary shedding that occurs when your body goes through a big physical change, like rapid weight loss. Your body basically says, "We've got more important things to fuel right now," and shifts hair follicles into a resting phase.
Two to four months later, you notice more hair in the brush.
This happens after bariatric surgery. It happens after crash diets. It happens after childbirth. It happens any time the body loses a significant amount of weight quickly — medication or not.
In the Semagutide clinical trials, hair thinning was reported by about 3% of patients versus 1% on placebo. And those who lost the most weight (20%+) saw it more often — because it's the weight loss, not the drug.
The Good News: It Grows Back
For the vast majority of people, telogen effluvium is completely reversible. Once your weight stabilizes and your body adjusts, hair follicles cycle back into active growth. Most patients see shedding slow within 3–6 months, with full density bouncing back over 6–12 months.
There is currently no evidence that GLP-1 medications cause permanent hair loss.
What You Can Do Right Now
Eat enough protein — aim for roughly 1 gram per pound of your goal body weight daily (Yes - this is likely more than our minimum recommended 100g/day). Your hair is made of protein (keratin), and if you're not eating enough, your body won't prioritize growing it.
Check your levels — iron, zinc, vitamin D, and B12 are all essential for healthy hair. A daily multivitamin and our BioBoost injections will ensure you're getting plenty of these. Reducing your incoming calories also means a reduction in nutrients..
Don't crash-diet on top of medication — the medication is already reducing your appetite. You don't need to add extreme restriction on top of it. Slow, steady loss is better for your hair and your metabolism. Don't Fast, and Low Carb and take a GLP-1 - (you'd be surprised how many patients are doing this)
Be patient — shedding that starts a few months in is a sign your body is adjusting, not a sign something is wrong.
When to Talk to a Dermatologist
If shedding continues beyond a year, or if you notice large patchy loss rather than overall thinning, it's worth getting checked. Telogen effluvium causes even, diffuse thinning — not bald patches. Patchy loss could indicate something else entirely.
Bottom line: don't let fear of temporary hair shedding keep you from a treatment that could add years to your life. We've walked dozens of patients through this exact concern, and nearly all of them are glad they stayed the course.
Daryl and Jennifer Welsh
Pacific Northwest Medical Group
Puyallup: (253) 340-2270 | Federal Way: (253) 363-8877
Book a FREE consult now ← Click There!
References
[1] Clinical trial data on semaglutide and hair loss. Novo Nordisk prescribing information / CNN reporting. https://www.cnn.com/2025/11/14/health/glp-1-hair-loss-telogen-effluvium-wellness
[2] Hair Loss and GLP-1s: Telogen effluvium explained. Nashville Dermatology Physicians, Dr. Jeffrey Berti. https://www.nashvilledermatologyphysicians.com/blog/1376485-hair-loss-and-glp-1s-learn-all-about-it/
[3] Does Semaglutide or Tirzepatide Cause Hair Loss? Ivím Health, clinical trial data review. https://www.ivimhealth.com/semaglutide-tirzepatide-hair-loss/
[4] Prevalence and Predictors of Hair Shedding among GLP-1 Receptor Agonist Users. Alharbi & Alkhalifah, Karger, 2026. https://karger.com/article/doi/10.1159/000550540
[5] The Reality of Telogen Effluvium and GLP-1 Medications. Oregon State University, 2026. https://blogs.oregonstate.edu/wander/the-reality-of-telogen-effluvium-and-glp-1-medications-a-realistic-guide/
