With the colder months approaching we are heading into the season when people start to pick up colds, coughs and even flu. The body does an amazing job protecting us from viruses, bacteria and infections but in order to function optimally the immune system requires many nutrients, adequate sleep, relaxation and exercise. Top tips to look after your immune system Eat plenty of fresh vegetables, fruit and wholegrains - rich in fibre, vitamins, minerals and antioxidants. Onions