Foods high in Tryptophan (Tofu, ground flax seed, pumpkin seeds, gluten flour, Almonds, sesame seeds, black walnuts). Note, meat blocks tryptophan flow to the brain where it is needed.
Foods high in Omega-3 (Flax seed oil, ground flax seed, English walnuts, canola oil, wheat germ oil, soybean oil, ).
Foods high in Folate (Chickpeas, Black-eyed peas, Lentils, Red kidney beans).
Vitamin B-12 plays a role also (enriched cereal-Total, whole eggs, soy milk).