The immune system is the body's first line of defense against bacteria, viruses, and various pathogens. For this system to function efficiently, it needs a complete and balanced diet that provides it with the necessary energy and nutrients. The Importance of a Balanced Diet: Vitamins: Such as vitamin C, found in citrus fruits and peppers, and vitamin D, which supports immune cells. Minerals: Such as zinc, found in nuts and seeds, and iron, which is essential for red blood cell production. Proteins: Help build antibodies and regenerate immune cells. Antioxidants: Protect cells from damage caused by free radicals. Immune-Boosting Foods: Fresh, colorful fruits and vegetables. Whole grains and legumes. Fatty fish, such as salmon, which are rich in omega-3 fatty acids. Nuts and seeds. General Advice: Drink plenty of water. Avoid excessive consumption of sugars and saturated fats. Exercise and get enough sleep as complementary parts of a balanced diet.