Your body needs niacin to produce two crucial enzymes that help release energy in the form of glucose from the food you digest. This happens by means of the Krebs cycle - a complex process that takes place in the cells and generates energy in the form of ATP and carbon dioxide. The cycle is the final step in the oxidation of protein, carbohydrate and fat.
Niacin also plays a role in the growth of healthy skin, helps nerves develop normally and helps your digestive system stay healthy.
Niacin also blocks the production of cholesterol in the body, thus playing an important part in preventing heart disease.