The properties of Vitamin B3
Vitamin B3 is a vitamin that includes three forms: nicotinamide (niacinamide), niacin (nicotinic acid), and nicotinamide riboside. All three forms of vitamin B3 are converted within the body to nicotinamide adenine dinucleotide (NAD). NAD is required for human life and people are unable to make it within their bodies without one of the vitamin B3 or tryptophan. The group is also occasionally referred to as vitamin B3 complex.