Definition
Telogen effluvium is temporary, excessive hair shedding that starts a few months after a stressor like major weight loss, surgery, illness or childbirth. Hair usually regains its fullness within 6 to 9 months once the body readjusts.
Shedding 50 to 100 hairs a day is normal. Telogen effluvium is when the body sheds significantly more. The American Academy of Dermatology lists losing 20 pounds or more as a common trigger, along with surgery, high fever, illness and childbirth. Most people notice it a few months after the event. It is different from hair loss where something stops hair from growing; with shedding, the hair grows back as the body readjusts. If the stressor continues, shedding can last longer.
The GLP-1 labels link hair loss to weight reduction. In the Wegovy label, 3.3% of adults on 2.4 mg reported hair loss vs 1% on placebo, and women more than men. In the Zepbound label, 7.1% of women reported it vs 1.3% on placebo, and in the Foundayo label 7% of women vs 3%. If shedding is heavy, patchy or lasts beyond several months, a dermatologist or your prescriber can look for other causes.
At GLP-1 SOS we made GLP-1 SOS Daily Hair Shield for this stage: iron bisglycinate, zinc, vitamin D3, folate, B12 and biotin, 2 capsules with dinner, designed to support healthy hair during weight loss.* Tell your doctor you take biotin before any blood test.
*GLP-1 SOS Daily Hair Shield supports healthy hair during weight loss. 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.
In the Lab
- Why hair falls out on a GLP-1 (telogen effluvium)
- What to do about hair loss on a GLP-1
- How much protein should I eat on a GLP-1?
- Best protein sources and shakes when you can’t eat much
From the people behind the Lab
You do not have to figure this out alone.
GLP-1 SOS is the daily companion made for life on a GLP-1. Plain answers like this one, a support team that replies to real questions from real people, and daily formulas like GLP-1 SOS Daily Hair Shield, designed around the side effects that come with the medication. The GLP-1 Lab is our free education arm: no login, no paywall, no hype. Side effects are part of the road. Suffering through them is not.
Sources (4)
- Do you have hair loss or hair shedding? American Academy of Dermatology Association, accessed October 2026.
- Wegovy (semaglutide) injection and tablets, Prescribing Information. Novo Nordisk / FDA, revised June 2026.
- Zepbound (tirzepatide) injection, Prescribing Information. Eli Lilly, revised August 2026.
- Foundayo (orforglipron) tablets, Prescribing Information. Eli Lilly, revised July 2026.
Reviewed by the GLP-1 SOS editorial team · Education, not medical advice · Talk to your prescriber about your dose and your symptoms.
