GLP-1 & Hair Loss
Causes and Prevention (2026 Guide)
Does Ozempic or Mounjaro cause hair loss? Learn about telogen effluvium from rapid weight loss and how to prevent hair thinning on GLP-1 medications.
What Causes Hair Loss on GLP-1?
Key insight: It's not the medication directly—it's the rapid weight loss. This condition is called telogen effluvium.
When your body experiences stress (rapid weight loss, caloric deficit, nutritional deficiencies), hair follicles prematurely enter the "resting" (telogen) phase. 2-3 months later, this hair falls out.
In clinical trials, about 3-5% of participants on semaglutide and tirzepatide reported hair loss, compared to 1% on placebo. The same rate is seen with bariatric surgery and crash diets.
When to See a Doctor
Hair loss continues past 12 months
You notice patchy bald spots (could be alopecia areata)
Scalp is itchy, red, or flaky (could be fungal or inflammatory)
You have other symptoms like fatigue, weight gain, cold intolerance (could be thyroid)
Guide FAQs
Does Ozempic or Mounjaro cause hair loss? Learn about telogen effluvium from rapid weight loss and how to prevent hair thinning on GLP-1 medications.
Yes. Shotlee supports tracking GLP-1 Hair Loss doses, side effects, and health metrics. It is free to use.
References
- [1]Clinical TrialJastreboff AM et al. Tirzepatide Once Weekly for the Treatment of Obesity (SURMOUNT-1). N Engl J Med. 2022;387:205-216.
- [2]Clinical TrialWilding JPH et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity (STEP 1). N Engl J Med. 2021;384:989-1002.
- [3]ReviewMalkud S. Telogen Effluvium: A Review. J Clin Diagn Res. 2015;9(9):WE01-WE03.
- [4]FDANovo Nordisk. Wegovy (semaglutide) Prescribing Information. U.S. Food and Drug Administration.
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