The immune system is the body’s natural defense against infections, and its function can be influenced by many factors, including diet, genetics, and nutrient levels. While there is no single food or supplement that can provide a "magic boost" to the immune system, optimising nutrient intake is essential for supporting immune health. Nutrients like vitamins A, C, D, folate, iron, and zinc are key to maintaining strong immune responses, and genetic factors can influence how well your body absorbs and utilises these nutrients.