Abstract: Tryptophan is one of the essential amino acids in the human body, metabolized to produce indole derivatives such as kynurenine, serotonin, melatonin, and indole-3-acetic acid. It plays a crucial regulatory role in physiological functions. This article uses personification to narrate the story of tryptophan being converted into various products through metabolism and artificial synthesis, highlighting the importance of tryptophan metabolic pathways in diverse life activities.

Key words: Tryptophan, Metabolic pathway, Indoles, Popularization of science