Good Housekeeping

inside the GH Beauty Lab

Q Do biotin shampoos really help grow hair?

—ELEANOR L.

The short answer: probably not. You may have seen biotin (another name for vitamin B) touted on haircare products and in supplements for its hair-growth benefits. “Hair loss is a symptom of biotin deficiency, so biotin supplementation may  Full & Vibrant Volumizing Shampoo, $10, Target

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