Niacin is also known as vitamin B3 (nicotinic acid), niacin is one of the 8 B vitamins. Like all B vitamins, niacin plays a role in converting carbohydrates into glucose, metabolizing fats and proteins and keeping the nerves system work well. Niacin also helps the body make hormones related to sex, stress and improves blood circulation and cholesterol levels. So which foods are high in niacin? This article will provide you with information about 16 common foods in daily meals that are high in niacin.