Which nutrient is essential for optimal immune function?

Vitamin C is a crucial nutrient for optimal immune function due to its role as an antioxidant and its ability to enhance the immune system's response. It is involved in the production and function of white blood cells, which are vital to the body's defense against pathogens. Additionally, vitamin C helps protect immune cells from oxidative damage and plays a role in signaling processes that ensure adequate immune response.

Its significance becomes particularly evident during periods of increased stress or illness, when the body’s demand for vitamin C rises. Foods rich in vitamin C, such as citrus fruits, berries, and green leafy vegetables, are recommended to support overall health and immune resilience.

While other vitamins like A, D, and E also contribute to immune function, vitamin C is particularly well-studied for its direct effects on immune cells and its ability to bolster the body’s defenses in various ways.