Unless you are genuinely deficient — which is uncommon — extra biotin has not been shown to do anything for hair. Most hair gummies are biotin with sugar around it.
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Hair gummies. Most of them are biotin and here's the part the label leaves out. Unless you're genuinely deficient, which is rare, extra biotin has never been shown to do anything for hair. It has been shown to do something else. High doses interfere with common lab tests including a key heart attack marker. The FDA issued a warning after a death. Your gummy can lie to your doctor.
There is a real risk worth knowing about. High-dose biotin interferes with common laboratory tests, including troponin, the marker used to detect a heart attack. The FDA issued a safety warning after a death linked to a falsely normal result. If you take a hair supplement, tell your doctor before any blood test.