A well-balanced diet significantly impacts immune function by providing the necessary nutrients that support the immune system. Vitamins and minerals, such as vitamin C, vitamin D, and zinc, play crucial roles in immune response and cellular function. Antioxidants found in fruits and vegetables help reduce inflammation and combat oxidative stress, which can impair immune health. Proper hydration and balanced macronutrients also contribute to a robust immune system, enabling the body to effectively fight infections and maintain overall health.