Polarised light micrograph of nicotinic acid, also known as vitamin B3. Meat, fish and vegetables provide a rich source of B3. Nicotinic acid can be produced by the body once a diet has an adequate supply of the amino acid tryptophan. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gaff, Karl |
Bildgröße: | 4860 px × 3627 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |