How does nutrition influence immune system health and function?.

Nutrition significantly impacts the immune system, with certain nutrients playing key roles in enhancing immune responses. A balanced diet rich in vitamins, minerals, antioxidants, and macronutrients can improve the body's ability to fight infections and diseases. Nutrients such as vitamin C, vitamin D, zinc, and protein are particularly vital for maintaining optimal immune function. Poor nutrition, on the other hand, can lead to deficiencies that impair immune responses, making the body more susceptible to illnesses.