Jim, a College Baseball Player, Tells You That He Has

Jim, a college baseball player, tells you that he has started to take glutamine supplements. How would you advise him? ​

A) As long as he keeps the dose under 10 grams per day, the benefits outweigh the costs.
B) Since he plays baseball, he should consider taking alanine supplements instead.
C) Since he plays baseball, he should consider taking tryptophan supplements instead.
D) Since single amino acids do not occur naturally in foods, they offer no benefit to the body and may even be harmful.