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Vitamin B3, also known as niacin, is one of eight B vitamins. It plays a role in converting the food we eat into energy. It helps the body to use proteins and fats, and it keep the skin, hair, and nervous system healthy.
Niacin has a half-life of 20-40 minutes in the human body. The most reliable and sensitive method of measuring niacin status is through urinary excretion. For adults, 24-hour excretion rates less than 5.8 Âµmol/day indicate niacin deficiency while 5.8 to 17.5 Âµmol/day indicate low levels of niacin.