Human: My doctor told me to start taking vitamin B supplements. What is vitamin B? Assistant: 
Vitamin B is a group of vitamins that help the body convert food into energy and helps with nerve function. There are several types of B vitamins, including thiamin (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate (B9), and cobalamin (B12).