Does Biotin Really Make Your Hair Thicker? Experts Weigh In
Creatrip Team
3 months ago
Biotin (vitamin B7) helps metabolize carbs, fats and proteins and supports keratin structure in hair, skin and nails. However, deficiency is rare for most people who get enough from common foods like eggs, nuts, seeds, meat and fish. Experts say biotin supplements only help when a true deficiency exists—such as in people with a genetic lack of the enzyme biotinidase, pregnant/nursing women with increased needs, chronic alcohol users, or long-term users of some anticonvulsants. Symptoms of deficiency include thinning hair, weak nails, red scaly rashes around the mouth, tongue pain and numbness. The recommended daily intake is about 30 µg for adults; doctors may prescribe much higher doses for treatment. For healthy individuals without deficiency, studies show little to no benefit for hair growth. Biotin is water‑soluble and generally safe, but it can interfere with certain blood tests (e.g., thyroid and cardiac markers), so unnecessary use is discouraged.
