Vitamin B3 is water-soluble and occurs in various forms such as Nicotinamide, which is synonymous with Niacinamide and is the form of B3 found in dietary supplements . Our body can produce some amount of niacin from this amino acid tryptophan, as niacin and tryptophan have significant similarities in terms of their chemical structure. Niacin is found in abundance mainly in meat, fish and peanuts. Niacin participates in over 50 metabolic reactions in the body such as glycolysis, the Krebs cycle and the pentose phosphate metabolic pathway, that is, in all those metabolic pathways in which energy is produced from the nutrients in food. Also, it is essential for the metabolism of essential and non-essential fatty acids and the deamination of amino acids, as well as the creation of red blood cells, steroid hormones and cellular energy production. Niacin is a vital component for maintaining the integrity of all cells in the body.