Niacin is one of Vitamin B3 forms. It is also called nicotinic acid. The other form of Vitamin B3 is called niacinamide. Niacin plays an important role in many aspects of energy metabolism and nervous system function. It is involved in the function of many enzymes of a wide range of body processes, which include the release of energy from fats, carbohydrates and proteins. The Daily Value of niacin is 20mg. Yet many clinic trials prove that at higher dose, typically in the range of 250-2000mg/day, niacin can lower cholesterol level, thus benefits cardiovascular system. Dosing use usually is started at the low-end (250mg/day) with increasing dose of 250mg each one or two weeks till 1000-2000mg/day. Note: when higher dose (above 100mg/day) of niacin is used for lowering cholesterol level, niacin may cause flushing, itching, rush of the skin as well as headaches and hypotension. Please consult your physician before you intend to use niacin for this purpose. Generally use amount: to take 1/8 teaspoon powder (about 250 mg) in one glass of water or juice, 1 to 3 times daily. Or do your own research for proper amount of your desired purpose, and your use purpose. Warnings: The above description is for informational purpose, not as healthcare professional advice. Please read the whole description carefully before you take this amino acid. Please consult your doctor and/or pharmacist before you take this amino acid. Pregnant or lactating women, people with diabetics, hypoglycemics, and people with known medical conditions and/or taking drugs, should consult with a licensed physician and/or pharmacist prior to starting any supplementation program.