Vitamins are biologically active substances, which act as catalysts and/or regulators of most of the processes in the tissues and cells of the human body.
They are not a direct source of energy.

You should have in mind that practically there are no “minor” vitamins and minerals. The deficiency, the great imbalance of any biologically active substance which is important to the human body sooner or later will have adverse effects.

The varied diet is also part of the solution to this problem.

Below is a brief and popular description of the role of the vitamins and minerals considered by us