Also see: Sugar Ads Gelatin, stress, longevity Gelatin > Whey Thyroid peroxidase activity is inhibited by amino acids Whey, Tryptophan, & Serotonin Tryptophan, Fatigue, Training, and Performance Carbohydrate Lowers Free Tryptophan Protective Glycine Enzyme to Know: Tryptophan Hydroxylase Tryptophan Metabolism: Effects of Progesterone, Estrogen, and PUFA Intestinal Serotonin and Bone Loss Serotonin and Melatonin Lower [...]