Water soluble vitamins
They are soluble in water, and therefore they diffuse very well through the blood. They are coenzymes or precursors of coenzymes, necessary for many chemical reactions of metabolism. The excess of ingested vitamins does not cause disorders, since it is excreted in the urine, which is why an almost daily intake is required, because as it is not stored, it depends on the diet. This group includes the B complex vitamins (vitamins B1, B2, B3, B5, B6, B8, B9 and B12) and vitamin C.