Water soluble B vitamin. It participates in many metabolic processes in the human body such as carbohydrate, fat and protein metabolism, in the production of energy from foods (it is abundant in meat, fish, nuts), maintaining a healthy skin & nervous system & as correct cholesterol levels by promoting the growth of good (HDL). The Vitamin B3 of HealthAid is in the form of niacinamide, which is the active form of niacin. Taking it may cause a temporary flare or burning sensation because it dilates the blood vessels. Symptoms recede in half an hour.