Many of these treatments involve large and expensive amounts of vitamins. Injectable niacin and niacinamide are given by or under the supervision of a health care professional. Other forms of niacin and niacinamide are available without a prescription. Follow carefully any diet program your health care professional may recommend. Niacin is found in meats, eggs, and milk and dairy products.
Little niacin is lost from foods during ordinary cooking.
Vitamins alone will not take the place of a good diet and will not provide energy. Your body also needs other substances found in food such as protein, minerals, carbohydrates, and fat. Vitamins themselves often cannot work without the presence of other foods. The daily amount of niacin needed is defined in several different ways. If you are taking this dietary supplement without a prescription, carefully read and follow any precautions on the label.