I attended a lecture on the connection between food and depression, and the information was amazing. By our eating habits, we are determining also our attitudes. Somewhere during the lecture we participants received a handout listing essential chemicals for feeding and maintaining a healthy brain. Here is the list, which appears to be taken from a book entitled "Nutrition for the Brain" (page 61). BRAIN ESSENTIALS tryptophan: pumpkin, sesame and sunflower seeds, tofu, cauliflower, walnuts, flaxseed and grapes tyrosine: watermelon, almonds, lentils, whole grains (wheat and oats), bananas, lima beans, avocados, seaweed (spiraling), and dry roasted soy beans no cholesterol: whole grains, fruits, vegetables and nuts iron: seaweed, soy beans, pumpkin and sesame seeds, cashews, raisins and sun-dried tomatoes thiamine: macadamia nuts, pistachios, fresh green peas, edamame, navy beans and asparagus choline and betaine: quinoa, spinach, green soybeans and beets