Constant stress and a bad mood can arise from improper nutrition. Many believe that one should eat something sweet, especially chocolate, to feel better. But that’s not entirely true, according to nutritionist Vira Kuryn. Causes of bad mood The reason for such a state is nutrition. A person’s diet may be lacking in products that contain tryptophan. Tryptophan or L Tryptophan is one of the essential amino acids for the human body. It is not produced by the body itself. The main functions of tryptophan include: Promotes natural healthy sleep by reducing the time it takes to fall asleep without d…