What is immune function?
Your immune function is your body's first line of defence against harmful things (like viruses and bacteria), protecting you from infections and diseases. A range of things can affect how well it functions — including many lifestyle factors like diet and exercise.
Your body relies on several nutrients to optimise your immune system. While a balanced diet is the best way to get the nutrients you need, certain diets, medications, or conditions might put you at risk of a deficiency.