What is the primary role of water-soluble vitamins in the body?

Water-soluble vitamins primarily serve as coenzymes in various metabolic processes within the body. These vitamins, which include the B-complex vitamins and vitamin C, facilitate biochemical reactions by helping enzymes function effectively. For instance, many of the B vitamins are integral to the processes of energy metabolism, where they assist in converting carbohydrates, fats, and proteins into usable forms of energy.

Their role as coenzymes is critical because without these vitamins, the enzymes that require them may not function properly, leading to metabolic deficiencies. This can result in a range of health issues, underscoring the importance of adequate intake of water-soluble vitamins in the diet for maintaining metabolic health and supporting bodily functions.

While other options mention important physiological processes, such as energy production, hormone synthesis, and promoting bone health, these do not specifically define the primary role of water-soluble vitamins as accurately as their function as coenzymes does.