Sentinel Niacin is a dietary supplement containing 60 capsules of Niacin (Vitamin B3). This essential vitamin supplement supports various bodily functions including energy metabolism, nervous system health, and maintaining healthy skin. Niacin, also known as Vitamin B3, is a water-soluble vitamin that plays a crucial role in converting food into energy. It helps maintain proper function of the nervous system, digestive system, and skin health. The supplement comes in a dark amber bottle to protect the contents from light and maintain potency. As with any supplement, it should be taken as directed by a healthcare professional, as niacin can cause temporary flushing in some individuals.