I hear biotin pills are good for hair and nail health. do you by any chance get facial hair in women for taking biotin pills for an 18 year old?

Not scientific: Biotin is often recommended as a dietary supplement for strengthening hair and nails, though scientific data supporting this usage are weak. Nevertheless, biotin is found in many cosmetics and health products for the hair and skin. While a true deficiency can cause hair loss, there is no evidence that the supplement will cause facial hair to grow.