Eating more vegetables each day might make you happier. In a new study published in the Journal of the Academy of Nutrition and Dietetics, researchers with the U.S. Department of Agriculture studied 75 adults who normally ate low amounts of vegetables. Half of them were assigned to eat two and a half servings of vegetables, legumes, avocados, and other nutrient-dense plants each day. After just eight weeks, the adults who ate more vegetables had higher scores on a happiness scale than they did before the study, and more happiness than those in the study who did not eat more vegetables. Plus, you don’t need to eat large amounts of vegetables. The amount of vegetables in this study – two and a half servings – is far less than what most nutrition experts recommend.