We rather not use tryptophan supplements though, because in 1989 it was a cause of the Eosinophilia-myalgia syndrome (EMS), a syndrome that can cause permanent disability and even death.

• 但我们宁愿不用色氨酸这种物质，因为在1989年色氨酸是嗜酸性粒细胞增多-肌痛综合征（EMS)的起因，该综合征可以导致永久性的残废，甚至死亡。