NMN can be naturally synthesized in cells, and can also be derived from a variety of foods, including broccoli, cabbage,cucumber,edamame, avocado and the like. In humans, NMN is a precursor of synthetic NAD+, and its physiological function is mainly manifested by increasing NAD+ levels.
Nicotinamide mononucleotide is a nucleotide derived from ribose and nicotinamide. Like nicotinamide riboside, NMN is a derivative of niacin, and humans also have an enzyme that uses NMN to generate nicotinamide adenine dinucleotide.