Vitamin B3 is also known as nicotinic acid and nicotinamide. It can be dissolved in water and can make use of tryptophan for synthesis in the human body, and it is an essential substance of synthetic hormones. Vitamin B3 can promote blood circulation, lower blood pressure, lower cholesterol and triglycerides, reduce gastrointestinal disorder and alleviate the symptoms of Meniere's syndrome and so on. Vitamin B3 has effects for seborrheic dermatitis and eczema and the functions for whitening and activating the skin cells. Vitamin B3 exists in animal livers, kidneys, lean meat, eggs, wheat germ, whole wheat products, peanuts, figs, etc.