There are some supplements that are meant to prevent specific conditions. For example a supplement made of iron can prevent anemia condition. Thus, you must be realistic when buying supplements. The online content can to some extent be deceptive. It is unfortunate how some marketers post misleading information to tempt their target into purchasing specific products. Information posted online trying to convince you that dietary supplement can heal a particular condition should raise your skepticism. Ideally, supplements work by enhancing your body functionality through supplementing the vitamins or minerals that may be lacking in your diet, and as a result, your health is improved. With this in mind, it is clear why you need to check with a nutritional practitioner who will examine the levels of vitamins and minerals in your daily diet, to determine what you need for your supplements.