niacin is the general term for vitamin b 3 as it can occur in several forms including nicotinic acid & nicotinamide (niacinamide) the latter of which we think is the best form to use in supplements. niacin is usually obtained from the diet from high protein foods such as meat fish & nuts.niacin contributes to the normal function of the nervous system as well as to the maintenance of normal skin & mucous membranes. like many of the b vitamins it is also involved in the metabolic processes that release energy from food.this is a high strength supplement that provides a level of niacin that would be difficult to obtain from your diet alone. we therefore recommend it for relatively short periods of up to 4 months not because of any safety concerns but because the body is unlikely to need this level for an extended period.high levels of niacin are also included in our b 50 complex & b 100 complex., pharmaceutical grade vitaminhigh strength pure nicotinamide, one-a-day tabletsgreat value for your money uk made, taste free tabletsgmp pharmaceutical manufactured