What are vitamins primarily responsible for?

Vitamins play a crucial role in regulating various bodily processes. They serve as essential nutrients that support functions such as metabolism, immune system performance, and the maintenance of healthy skin, eyes, and cellular functions. Each vitamin has specific roles; for example, some are involved in energy production, while others support the nervous system or help in the formation of red blood cells. This overarching regulatory function is vital for maintaining overall health.

While certain options touch upon important aspects of nutrition, vitamins are not primarily focused on building muscle mass, directly producing energy from carbohydrates, or specifically absorbing minerals like calcium and iron. Instead, their main contribution lies in ensuring that all these processes—muscle building, energy production, and mineral absorption—function properly through the regulation of multiple biochemical pathways.