SwansonL-Tryptophan

L-Tryptophan is an essential amino acid, which means the body cannot produce it itself and it must be obtained through diet or supplements.

Essential amino acids cannot be produced by the body and must be obtained through diet or supplements. Non-essential amino acids can be made by the body from other nutrients. L-Tryptophan is an essential amino acid.

L-Tryptophan is one of the few essential amino acids and appears less often in supplement form than, for example, L-lysine or L-glutamine. Unlike some other amino acids, tryptophan must always be taken through diet or a supplement.

L-tryptophan is best absorbed on an empty stomach, preferably 30 to 60 minutes before sleep or between meals.

L-tryptophan in free form means that the amino acid is not bound to other substances such as proteins or peptides. This makes it directly available for absorption in the body.