A number of factors can impact the effectiveness of your immune system, such as stress, smoking and over-indulging in alcohol, and minimising those three things can help increase your body's strength. Eating a healthy diet, packed with nutrients, is another positive step you can take, and the recipes in this book are designed to include the main vitamins and minerals to boost your immune system, such as vitamins A, C, D and E, plus folate, iron, selenium...