Also see: Estrogen Increases Serotonin Hypothyroidism and Serotonin Omega -3 “Deficiency” Decreases Serotonin Producing Enzyme Enzyme to Know: Tryptophan Hydroxylase Tryptophan, Sleep, and Depression Carbohydrate Lowers Free Tryptophan Gelatin > Whey Serotonin, Fatigue, Training, and Performance Gelatin, Glycine, and Metabolism Whey, Tryptophan, & Serotonin Serotonin and Melatonin Lower Progesterone Role of Serotonin in Preeclampsia Maternal [...]