Dermatologist Dr. Sarah Page explains why many people experience hair loss after weight loss or bariatric surgery, focusing on telogen effluvium — a delayed shedding that often appears about three months after the trigger. She covers common causes such as rapid weight loss, iron and zinc deficiencies, thyroid changes, hormonal shifts and stress.
Dr. Page outlines practical steps: get blood tests (iron, zinc, vitamin D, thyroid, hormones), replace specific deficiencies rather than taking generic supplements, consider treatments like topical minoxidil (which can initially shed hairs before thickening them), and be gentle with styling. Recovery commonly takes several months and can take up to a year.
Most cases are temporary; reduce stress, address nutrition, and see a specialist if hair loss persists.

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