Vitamins are a great back up source, as they will provide your body with the minerals and nutrients it needs in the event of your diet failing you. Before or after every meal that you consume, you should take vitamins or supplements. If you have a deficiency in a certain vitamin or vitamins, you should make sure that you never miss taking the vitamin you need. Even though vitamin B3 niacin is great as a stand alone supplement, it should also consumed with foods that contain protein, due to the fact that the body is able to convert the amino acid known as tryptophan into niacin. The higher doses of B3 niacin, which are available only through prescription, have been proven to prevent and also improve a variety of different symptoms and ailments. Together, the combination of the two will work side by side, and enhance their overall impact on your body and your health. Vitamin C is well known as an antioxidant, protecting your skin from the harmful damage of UV rays. If you skin suffers from radiation damage, vitamin C can actually help your skin to recover and reverse some of the harmful effects. As an antioxidant, vitamin E will help to prevent this type of stress, which will prevent the cells from aging or sustaining any type of permanent damage as well. Cholesterol, which is a fatty substance found in many foods, is absorbed by the body then transferred from the liver to be stored by tissue as fat. With vitamin supplements being a big business, there are many manufacturers to choose from. Each year, there are thousands of supplements out there, with customers spending billions and billions of dollars to get the supplements and vitamins they need. Right now, there are 3 different delivery systems for supplements liquid, capsules, and tablets. Some good examples of supplements include protein, vitamins, and minerals. You can find them in many different foods, or use vitamins and nutritional supplements that contain them. If you are looking to lose weight, nutritional supplements may come in handy. Anytime you decide to diet, you eat much less and may end up missing on foods that contain essential vitamins and minerals.