And as you were saying, I just want to echo
Tryptophan is an essential amino acid obtained solely from the diet and serves as a precursor for serotonin synthesis and it can produce seratonin via tryptophan hydroxylase 1 activity in the intestinal enterochromaffin cells (Jenkins et al., 2016)
Redox Report 1999 , 4 (12), 5359
Comparing Research Grade vs
It aids in the breakdown of toxic substances and plays a central role in protein synthesis, bile production, and the metabolism of fats and glucose
Jastreboff AM, Arrone LJ, Ahmad NN, et al