While some supplements and vitamins on the market are not worth buying and some, such as Ephedrine, have been proven dangerous, other sources are healthy. Most important, you need to understand what it is you are taking, and strictly follow dosage just as you would medication that has been prescribed. If you are unsure, check with your physician, a nutritionist, or a reputable health food store. Many supplements that are good for overall health include grape seed extract, Glucosamine, aloe vera, and Selenium. Vitamins to consider would include Vitamin E, Vitamin C, B-12, Iron, Magnesium, and Calcium.