As an antioxidant food source, few things are more valuable in our diet than garlic. This nutrient-dense food is not only versatile, but also very important if you’re concerned about premature aging. Garlic possesses sulfuric compounds that can slow down oxidative stress and improve the appearance of the skin, as well as other antioxidants that can help in other ways. The active ingredient of garlic, allicin, can reduce inflammation in the body, prevent the onset of cancer, and defend against many other chronic conditions that arise as we get older.