There are many vitamins that fall in this category, vitamin B complex. These are niacin, riboflavin, thiamine, pantothenic acid, pyridoxine, biotin, folic acid and cobalamin. These vitamins help the body by helping the body construct their own red blood cells and helping in the immune system. Each vitamin functions and provides for the body in different ways.
Other helpful things that these vitamins do are helping to convert food into energy. It also helps in growth and development. Some foods with these vitamins in them include milk, chickpeas, breakfast cereal, eggs, fish, meat, avocado, spinach and beef liver. There are things that make these vitamins different than other vitamins and it is mainly because these vitamins are water-soluble except absorbic acid.