Why Antioxidants? Antioxidants slow down the aging process by neutralizing free radicals, an unwanted by-product of normal metabolic processes in your body. Deeply colored whole foods are the best source of these free radical fighters due to the synergistic affect of multiple nutrients and other compounds. This Organic Antioxidant Superfruit Granola contains whole grains, nuts, seeds, and richly colored cranberries, blueberries and goji berries for a delicious dose of antioxidant power.