Β3, also known as Niacin, is a water-soluble vitamin that plays a crucial role in converting food into energy. It is part of the B-vitamin complex and is essential for the proper functioning of the nervous system, digestive system, and skin health. Niacin helps the body utilize carbohydrates, fats, and proteins effectively. Niacin can be obtained from various food sources, including meat, fish, eggs, and green leafy vegetables. It can also be synthesized in the body from the amino acid tryptophan. A deficiency in niacin can lead to health issues such as pellagra, characterized by symptoms like dermatitis, diarrhea, and dementia.