Functions of vitamins
Vitamins are very important for the proper functioning of the body. They are present in minute quantities in our food & are required by the body in minute quantities only. They are, so to say, catalysts in our body, as they assist & hasten metabolic activities. They have a profound influence on growth & development, utilization of the macronutrients for body building, repair, replenishment, maintenance of health & protection from diseases.
Vitamins:
Water soluble Vitamins - B complex, C
Fat soluble Vitamins - A, D, E, K.

Yeah we all need all the nutrients we got from our food for us to be functional everyday. I guess I needed more vitamin C.