Clinician answer
Yes, in almost every case. The shedding is telogen effluvium — a stress response to rapid weight loss, not a drug toxicity — and hair cycles back to baseline density within 6-9 months once weight stabilizes. Protect regrowth by hitting 0.7-1.0 g protein per lb body weight, keeping ferritin above 70 ng/mL, and adding 2000 IU vitamin D and a B-complex if labs are borderline.
Answered by Dr. Jane Novak, MD, MPH