Main Reaction: tryptophan>>serotonin

Reference: PubMed ID: 28800113
Authors: Havelund JF, Heegaard NHH, Færgeman NJK, Gramsbergen JB
Title: Biomarker Research in Parkinson's Disease Using Metabolite Profiling.
Published: 2017 Aug 11

tryptophan --> serotonin