Vitamin C is the primary vitamin found in citrus fruits, such as oranges, lemons, limes, and grapefruits. This essential nutrient plays a vital role in various bodily functions, including the synthesis of collagen, absorption of iron, and functioning of the immune system. It acts as a powerful antioxidant, helping to protect cells from oxidative stress and damage caused by free radicals. Regular consumption of citrus fruits, rich in vitamin C, can support overall health and well-being, bolstering the body’s defenses against common illnesses.