n.5-羥色胺；血清素
Once in the brain, the tryptophan is converted to serotonin. 一旦進(jìn)入大腦，色氨酸會被轉(zhuǎn)化成血清素。
Levels of serotonin and prolactin were not influenced by music therapy. 血清素和催乳激素則未有改善。
