system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why are there so many B vitamins?
gpt
B vitamins is just a classification grouping of vitamins. They are only B vitamins because someone decided they fit in that group. Importantly they are water soluble playing roles metabolism and red cell production.

Converting food to ATP is an important and complex process. And being complex has many steps and many needed chemicals to achieve that goal.