Hair Loss on GLP-1 Medications
Hair shedding is one of the most distressing and least-discussed side effects of GLP-1 treatment. If you're seeing more hair in the shower drain or on your brush, you're not alone — and it's almost certainly not permanent.
Why It Happens
The primary driver is a condition called telogen effluvium — a stress response where large numbers of hair follicles simultaneously shift from the growth phase (anagen) into the resting/shedding phase (telogen). Rapid weight loss, reduced calorie intake, and nutritional shifts are well-documented triggers. The GLP-1 medication itself is rarely the direct cause. Shedding typically begins 2–4 months after the triggering event and lasts 3–6 months before resolving on its own.
Practical Strategies
- Prioritize protein — inadequate protein intake accelerates hair loss. Aim for 0.7–1g per pound of body weight.
- Get blood work done. Check ferritin (stored iron), zinc, vitamin D, and thyroid function — all are common deficiencies that worsen shedding.
- Avoid aggressive styling, tight hairstyles, and heat during active shedding phases.
- Consider a gentle, sulfate-free shampoo and a hair-thickening conditioner while shedding is active.
- Biotin supplements are widely used. Evidence is limited for people without deficiency, but risk is low.
- Be patient. Telogen effluvium is self-limiting in most cases. Regrowth typically begins within 6 months.
Products That May Help
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Questions to Ask Your Clinician
Bring these to your next appointment. Your prescriber is your best resource for decisions specific to your situation.
- "Can we check my ferritin, zinc, vitamin D, and thyroid panel at my next visit?"
- "Is the rate of my weight loss likely contributing to my hair shedding?"
- "At what point would you recommend seeing a dermatologist or trichologist?"
- "Are there any medications or topical treatments (like minoxidil) worth discussing for my situation?"
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