What essential role do vitamins play in the body?

Vitamins play a crucial role in supporting metabolic reactions within the body. They act as coenzymes or cofactors that help enzymes function efficiently, assisting in various biochemical processes necessary for maintaining health. For example, many B vitamins are integral in energy metabolism, facilitating the conversion of carbohydrates, fats, and proteins into usable energy. Additionally, vitamins are involved in synthesizing hormones and neurotransmitters, contributing to overall regulatory functions within the body. Their deficiency can lead to metabolic imbalances, showcasing their essential role in these processes.

In contrast, while thermal energy is important for bodily functions, it is primarily a byproduct of metabolic reactions rather than a role of vitamins. Vitamins also do not serve as primary energy sources, as the body relies on macronutrients like carbohydrates, fats, and proteins for that purpose. Storing genetic information is a function associated with DNA, not vitamins, further clarifying the distinct role vitamins play in metabolic support.