7) Walnuts - When it comes to healthy snacks, very few can compete with walnuts. Walnuts are rich s of omega-3 fatty acids, and very high in fiber as well. Walnuts are used to treat depression and increase mental focus. They can be added to salads, cereals, yogurts, or eaten naturally.
8) Red Bell Peppers - Did you know that a cup of red bell peppers actually contains more vitamin C than an entire orange?! Red bell peppers are loaded with that magical vitamin, which also prevents fatigue symptoms from occurring. You can bake them, roast them, grill them, or simply eat them raw.