Niacin is synthesised from -
- niacin is essential for the metabolism of carbohydrate, fat and protein. It is also essential for the normal functioning of skin , intestinal and nervous system. - it differs from other other B complex vitamins that an essential amino acid tryptophan serves as its precursor. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:619 <\p>
Tryptophan
Tyrosine
Methionine
Phenylalanine
Nutrition and health