Vitamin B3 crystals,polarised light micrograph. Vitamin B3 exists in two main forms: niacin and niacinamide. This image is of crystals of niacinamide. Vitamin B3 is part of the vitamin B complex,and takes part in many metabolic reactions. Good sources of vitamin B3 are liver meat,groundnuts and sunflower seeds. A deficiency of this vitamin in the diet causes the disease pellagra. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gaff, Karl |
Taille de l’image : | 5120 px × 3413 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |