What is the Precurser of niacine?

The precursor of niacin (vitamin B3) is the amino acid tryptophan. Tryptophan can be converted into niacin in the body through a series of biochemical reactions. This conversion is significant because it allows the body to synthesize niacin from dietary protein sources. Additionally, niacin can also be obtained directly from dietary sources like meat, fish, and fortified grains.