Which vitamin is known to enhance the immune system?

Vitamin C is widely recognized for its role in enhancing the immune system. It is critical for the growth and functioning of immune cells, particularly lymphocytes and phagocytes, which help protect the body against infections. This vitamin acts as an antioxidant, helping to mitigate oxidative stress in the body, which can weaken immune function. Additionally, studies have shown that adequate levels of Vitamin C can reduce the duration and severity of common colds, highlighting its importance in immune health.

Vitamin A is also essential for immune function, particularly in maintaining the health of skin and mucosal cells, which act as barriers against pathogens. While Vitamin D plays a crucial role in modulating the immune response and supporting the body's defense mechanisms, its primary role is not as a direct enhancer. Vitamin E is an antioxidant and does contribute to immune defense by supporting cellular function but is not as directly linked to immune enhancement as Vitamin C is. Thus, Vitamin C's well-established benefits in bolstering the immune response make it the most prominent choice in this context.