how much biotin do you need a day
Normal daily recommended intakes for biotin are generally defined as follows: 1  Infants and childrenâ Birth to 3 years of age: 10 to 20 micrograms (mcg). 4 to 6 years of age: 25 mcg. 7 to 10 years of age: 30 mcg. 2  Adolescents and adultsâ 30 to 100 mcg.