What is the main function of fat-soluble vitamins in the body?

The primary function of fat-soluble vitamins, which include vitamins A, D, E, and K, is indeed to support immune function and hormone regulation. Each of these vitamins plays a unique role in maintaining various bodily processes.

For instance, vitamin A is essential for maintaining vision and supporting the immune system. Vitamin D is crucial for calcium absorption and bone health, and it also plays a role in immune response. Vitamin E acts as an antioxidant, protecting cells from damage, and vitamin K is vital for blood clotting and bone metabolism. Collectively, these vitamins contribute to essential physiological functions, including regulation of hormones—such as those involved in metabolic processes—which underscores their importance in overall health.

In contrast, quick energy production is more associated with carbohydrates and certain B vitamins. Growth and repair of tissues are primarily facilitated by proteins and specific vitamins, but fat-soluble vitamins do not directly provide this function. Finally, while fat-soluble vitamins can play a role in energy metabolism indirectly, they do not directly facilitate carbohydrate metabolism as that function is mainly attributed to water-soluble vitamins and specific enzymes.