Lipoic acid
This antioxidant is produced naturally by the body. It is a unique defender against free radicals, and is sometimes called the universal antioxidant. Many other internally produced antioxidants have specific jobs, whereas lipoic acid enhances the activities of other antioxidants in the body, as well as being an excellent antioxidant on its own account. Lipoic acid may, for instance, temporarily fill in for vitamins C or E if their levels are low. Because of its ability to pass through the blood-brain barrier, it can reverse the negative effects caused by a stroke. Lipoic acid helps normalize blood sugar levels and can prevent serious complications from diabetes. Our bodies’ production of lipoic acid decreases with advancing age, so it is a very beneficial supplement for those over age forty.