evidence: Fruits and vegetables are important for health and should form a major part of your daily diet. They are a great source of fibre, vitamins and minerals. Fibre is known to protect against bowel cancer. Fruit and vegetables also contain natural substances, such as antioxidants, that have cancer-protective effects. Fruit and vegetables may protect against cancer of the bowel, mouth, throat and stomach. Fruit may also protect against lung cancer. [...] Learn how to reduce your cancer risk by eating fruit, vegetables, wholegrains and fibre.