Which of the following substances is crucial for facilitating biochemical reactions in the body?

Vitamins are essential organic compounds that play a crucial role in facilitating biochemical reactions within the body. They act as coenzymes or cofactors in various metabolic processes, aiding enzymes in their function. For instance, many vitamins are involved in energy production, immune function, and the synthesis of important molecules.

While all the mentioned substances have important roles in overall health, vitamins specifically serve as critical components that help transform nutrients into energy, support cellular function, and promote healing and repair processes. This distinctly positions them as vital facilitators of biochemical reactions, highlighting their unique contribution to maintaining physiological balance and health.