Which of the following vitamins is commonly associated with enhancing immune function due to its antioxidant properties?

Vitamin A is well-known for its role in enhancing immune function, primarily due to its powerful antioxidant properties. Antioxidants are molecules that help neutralize free radicals in the body, which can otherwise lead to oxidative stress and damage cells. Specifically, Vitamin A is crucial for the maintenance of various immune system functions, including the production and function of white blood cells, which are essential for fighting infections.

Additionally, Vitamin A supports the integrity of mucosal surfaces, such as those found in the respiratory and gastrointestinal tracts. These surfaces act as barriers against pathogens, contributing further to immune defense. As a fat-soluble vitamin, it can also be stored in the liver and is released when needed by the body for immune health.

In contrast, while other vitamins mentioned may play roles in various bodily functions, including some aspects of immune response, they do not have the same direct link to antioxidant protection and the enhancement of immune function as Vitamin A. This makes Vitamin A particularly significant in discussions related to immunity and overall health.