What is the primary function of vitamins in the body?

The primary function of vitamins in the body is to support the maintenance of physiological functions. Vitamins are essential nutrients that play crucial roles in various biochemical processes, including metabolism, immune function, cell growth, and development. They act as coenzymes or cofactors that facilitate enzymatic reactions, contributing to the overall functioning of the body's systems.

While some vitamins can influence aspects of physical performance, this is not their primary role. They do not provide calories or energy directly, nor are they meant to increase total calorie intake. Instead, they work alongside other nutrients, such as carbohydrates, proteins, and fats, to ensure the body operates effectively and efficiently. The significance of vitamins lies in their ability to help the body utilize the energy from the macronutrients consumed, rather than serving as a direct source of energy themselves.