While many physical and dietary factors are linked to chronic disease, some research indicates that stress is one of the highest factors linked to bad health. By eating well, I believe that mental health improves and one is able to cope with life better, reducing stress. I also feel that vegetarian and vegan diets reduce anger and violent tendencies in people leading to a more peaceful and cooperative world.
A recent study published in the Nutrition Journal and summarized in this article indicates that a vegetarian diet improved mood within the study group over a fish and fish and meat diet. In fact, mood improved significantly. The results also indicated that the vegetarian group was better able to handle stress. This is a useful finding since both results point to better mental health and happier, more peaceful people which is central to healthy living and a healthy community.