Weight Watchers Easy Snack Recipes: The Ultimate Weight Loss Cookbook

Omega-3 fatty acids are another good nutrient to include in snacks, for your heart as well as your head. Tuna, walnuts, and some other foods contain omega-3s, which help fight high blood pressure and heart disease, as well as depression and anxiety.

The effects of omega-3s are also being studied as they relate to a number of other health conditions, including joint diseases, schizophrenia, and attention deficit hyperactivity disorder.