What Is Inositol Hexanicotinate Powder (Flush Free Niacin) Inositol hexanicotinate powder (flush free niacin), also known as inositol nicotinate, is a form of vitamin B (Vitamin B3) that plays an important role in converting food to energy. It is also sometimes referred to as "no flush niacin." One down side about taking niacin is that it can cause the speed of blood flowing throughout the body to increase substantially via its ability to dilate the blood vessels. This is known as "flushing." Taking inositol hexanicotinate allows much slower absorption of the Niacin, which helps negate the flushing side effect (flush free niacin or no flush niacin). Inositol Hexanicotinate Powder (Flush Free Niacin) Benefits Inositol hexanicotinate powder (flush free niacin) helps convert food to energy and works to help maintain healthy metabolism.* Flush free niacin also supports the heart and cardiovascular system, promotes brain health, benefits the skin, and supports the pancreas.*