Vitamin B is a group of water-soluble vitamins that are essential for various bodily functions, including metabolism, energy production, and the synthesis of red blood cells and DNA. There are eight B vitamins, which include thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate (B9), and cobalamin (B12). Each vitamin has a unique structure and function. B vitamins are typically found in a variety of foods, including whole grains, fruits, vegetables, dairy products, and meats. They can also be taken in supplement form.