Vitamin B3—niacin, niacinamide, nicotinic acid



Niacin is involved in reactions that generate energy in tissues by the biochemical conversion of carbohydrates, fats, and proteins. The two coenzymes of niacin, NAD (nicotinamide adenine dinucleotide) and NADP (nicotinamide adenine dinucleotide phosphate), are essential for utilizing the metabolic energy of foods. Niacin is essential for growth and is involved in the synthesis of hormones. Niacin is absorbed in the intestine and stored in the liver. Excessive niacin is excreted in the urine. Helps synthesize DNA.





Consuming alcohol and not having enough protein in your diet may increase your need for niacin. People with diabetes, glaucoma, any liver disease or peptic ulcers should be careful of niacin supplementation.

Liver, lean meat, poultry, fish, rabbit, nuts, peanut yeast, meats including liver, cereals, legumes, asparagus, seeds, milk, green leafy vegetables, and fish. Your daily cup of coffee also provides about 3 milligrams of niacin.