From the Manufacturer:
Niacin plays an important role in the conversion of carbohydrates, fats and protein to energy, and is involved in the synthesis of male and female sex hormones. Niacin promotes healthy skin, efficient functioning of the nervous and digestive systems, is useful in the treatment of schizophrenia and has also been demonstrated to improve mental alertness due to its ability to enhance microcirculation. This latter property of niacin, which comes about due to its ability to relax vein and artery walls, makes it a valuable aid in combating vascular conditions such as Raynaud’s disease, numbness, cramping and other symptoms of poor circulation, such as tinnitus.