In a probiotic-base & yeast-free Niacin, a member of the vitamin B complex, is water-soluble. It is more stable than thiamin or riboflavin by being remarkably resistant to heat, light, air, acids & alkalis. There are two forms of niacin. They are niacinamide (nicotinamide) & niacin (nicotinic acid). Niacin acts as a co-enzyme, assisting in the breakdown & utilisation of proteins, fats & carbohydrates. Niacin can be made by the body from the amino acid tryptophan. Niacin is effective in improving circulation & normalising blood cholesterol levels. It is vital for the proper activity of the nervous system & for the formation & maintenance of healthy skin, tongue & digestive system tissue. Niacin is necessary for the synthesis of sex hormones.