You probably already know that a healthy diet, complete with essential vitamins and minerals is vital to living a long and healthy life. What you may not know is that the global vitamin and supplement market is a $68 billion industry and every day, new vitamin products hit the market, some of which can actually be harmful to your body if not taken correctly. So which vitamins are important to your body and what do they do? What are the recommended levels of each vitamin your body needs? There are 13 essential vitamins that are necessary for the body to function properly and without them we are a target for.