Vitamin B3

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Vitamin B3 is a vitamin that includes three forms: nicotinamide (niacinamide), niacin (nicotinic acid), and nicotinamide riboside.[1] All three forms of vitamin B3 are converted within the body to nicotinamide adenine dinucleotide (NAD).[1] NAD is required for human life and people are unable to make it within their bodies without one of the vitamin B3 or tryptophan.[1] Nicotinamide riboside was identified as a form of vitamin B3 in 2004.[1] The group is also occasionally referred to as vitamin B3 complex.[2]


  1. ^ a b c d Stipanuk, Martha H.; Caudill, Marie A. (2013). Biochemical, Physiological, and Molecular Aspects of Human Nutrition - E-Book. Elsevier Health Sciences. p. 541. ISBN 9780323266956. Vitamin B3... potentially includes three different molecular forms: nicotinic acid, niacinamide, and nicotinamide riboside 
  2. ^ Silvestre, Ricardo; Torrado, Egídio (2018). Metabolic Interaction in Infection. Springer. p. 364. ISBN 978-3-3197-4932-7. Niacin or nicotinate, together with its amide form nicotinamide, defines the group of vitamin B3 complex