Good afternoon dr, i'm a 16 year old male (african american) & i bought some 5,000 mcg biotin pills, & i'm asking how many should i take a day?

Vitamin supplements: The best way to quantify the amount of vitamins needed is to determine if there is a deficiency or if supplementation is to maintain normal values. 5000 mcg of biotin will be acceptable for your age if you are deficient of Biotin. As with all medications please discuss with your doctor before using the medication. Egg yolk & liver are good sources, raw egg white can deplete your stores. Take care.