Metabolites of tryptophan can give rise to
Serotonin (a metabolite of tryptophan) causes vasoconstriction, flushing, chronic diarrhea and respiratory distress due to bronchospasm.
Albinism is a defect in the metabolism of tyrosine due to deficiency of tyrosinase.
Diarrhoea
Vasoconstriction
Flushing
All of these