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Niacin is an important vitamin involved in the production of metabolism and energy. It is a component of the B-complex vitamin also known as B3 and is vital to the regulation of liver function and for the removal of toxins from the organ. Since the human body makes niacin from amino acids, most individuals need only absorb a small amount through diet. Niacin flush is a side effect of consuming large amounts of niacin at one time.

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1. Is a Niacin Flush Harmful?

A niacin flush is not typically dangerous; it is a physical reaction that occurs when the small blood vessels in the face and neck dilate. This allows blood to rush to those areas, increasing redness. The reaction can also cause burning or itching. The effects of a niacin flush usually last for half an hour to an hour after one ingests an excess of niacin.

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