Vitamin A is required for good vision, a healthy immune system, and successful reproduction. The most recommended form of vitamin D is cholecalciferol, commonly known as cholecalciferol. This is the form of vitamin D that your body generates naturally as a consequence of exposure to sunlight. Vitamin E supplements may aid in the prevention of coronary heart disease, the improvement of immune function, the reduction of inflammation, the improvement of eye health, and the prevention of inflammation. Avocados are high in potassium, omega-3 fatty acids, vitamin C, and vitamin K, among other nutrients.