Translations:Vitamin B3/1/en
Class of chemically related vitamers
| Vitamin B3 | |
|---|---|
| Drug class | |
 Structure of nicotinamide, one of the vitamers of vitamin B3 | |
| Class identifiers | |
| Use | Vitamin B3 deficiency |
| ATC code | A11H |
| Biological target | enzyme cofactor |
| Clinical data | |
| Drugs.com | Niacin |
| External links | |
| MeSH | D009536 |
| Legal status | |
Vitamin B3, colloquially referred to as niacin, is a vitamin family that includes three forms, or vitamers: niacin (nicotinic acid), nicotinamide (niacinamide), 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 either vitamin B3 or tryptophan. Nicotinamide riboside was identified as a form of vitamin B3 in 2004.