Which nutrients are vital for the proper functioning of the immune system?

• A. Proteins and carbohydrates
• B. Vitamins A, C, D, and minerals like zinc and selenium
• C. Fats and sugars
• D. Vitamin B12 and omega-3 fatty acids

Answer: (B)

Vitamins A, C, D, and minerals like zinc and selenium play crucial roles in supporting the immune system's functionality. Each of these nutrients facilitates various immune processes:

• Vitamin A is essential for maintaining the structure and function of mucosal barriers, such as the lining of the respiratory tract, which serves as the first line of defense against pathogens. It also modulates immune responses, aiding in the functioning of T cells and enhancing the body’s ability to fight infections.

• Vitamin C is a potent antioxidant that protects immune cells from oxidative stress. It is crucial for the formation and function of various immune cells, including phagocytes and lymphocytes. Additionally, vitamin C enhances the skin’s barrier function and supports epithelial cells, which are integral to immune defense.

• Vitamin D is known for its preventive role against infections. It supports the activation of immune cells, such as macrophages and dendritic cells, enhancing their ability to identify and react to pathogens. Adequate vitamin D levels are associated with lower incidence of autoimmune diseases and infections.

• Zinc is vital for the development and function of immune cells, including neutrophils and natural killer cells. It also influences the growth and differentiation of T lymphocytes. Selenium, similarly, has antioxidant properties