My children's ages is 8, 13, and 16 yrs. old. The normal dosage of amino acids dosage for adults who exercise strenuously for good physique is 4 tablets after a meal, which is 12 tablets daily. I give one tablet for my 8 and 13 years old, while my 16 years old son takes two tablets. I am just wondering if there is any harmful effect giving this body building enhancing tablets?