If you’re looking to add bulk and lean muscle, mixed nuts should be a part of your meal plan just about every day. High in polyunsaturated fats, fiber, zinc, protein, and vitamin E, nuts also contain potassium and magnesium to help combat muscle cramps and fatigue. Just don’t forget about moderation. Nuts are tasty finger food that you can mindlessly grab while you work or watch your favorite show. Nuts are rich in fats so a handful per day is enough to enjoy all their benefits.