L-tryp.to.phan
n.（名词）The biologically active form of the amino acid tryptophan, which is capable of being incorporated into proteins, such as the neurotransmitter serotonin. It has not been available as a dietary supplement in the United States since 989 but is sold commercially outside of the United States.L-色胺酸：能与蛋白质合成的色胺基酸生物活化形式，如神经传递素5-羟色胺。直到989年美国才将其列入辅助食品，但也只在美国以外地区贩卖
