Back in the day, vitamins were discovered by observing the effects of not consuming certain foods. They observed two types: Fat soluble A, and water soluble B.
Then, as they started discovering the actual chemicals responsible, we got the various B vitamins.
Some were dropped because we discovered the body actually makes it on its own, and some were given different letters because their function was very different from the rest.
Back in the day, vitamins were discovered by observing the effects of not consuming certain foods. They observed two types: Fat soluble A, and water soluble B.
Then, as they started discovering the actual chemicals responsible, we got the various B vitamins.
Some were dropped because we discovered the body actually makes it on its own, and some were given different letters because their function was very different from the rest.