What is one function of vitamin A?

Vitamin A plays a crucial role in vision, particularly in the maintenance of healthy sight under low-light conditions. It is essential for the production of rhodopsin, a pigment in the retina that helps the eye detect light. Without adequate vitamin A, vision can be impaired, leading to conditions such as night blindness and, in severe cases, total blindness. This function makes vitamin A particularly important for overall eye health and visual functionality.

In contrast, while bone health is influenced by other vitamins and minerals, particularly vitamin D and calcium, it is not a primary role of vitamin A. Immune support is another vital role of certain nutrients, including vitamin A, though its most notable function remains tied to vision. Similarly, collagen production is primarily associated with vitamin C and certain amino acids, rather than vitamin A. Thus, the emphasis on vision accurately reflects one of the most well-documented and critical functions of vitamin A in the body.