Broccoli, cabbage and cauliflower: All contain a chemical component called indole-3-carbinol that can help combat breast cancer by converting a cancer-promoting oestrogen into a more protective variety.
Carrots: Contain a significant amount of beta carotene which may help reduce a wide range of cancers including lung, mouth, throat, stomach, intestine, bladder, prostate and breast.
Tomatoes: Contain lycopene, which may help protect men against prostate cancer.
Oranges and lemons: Contain limonene, which stimulates cancer-killing immune cells that may also break down cancer-causing substances.
Garlic: Kills bacteria and has immune-enhancing allium compounds that appear to increase the activity of immune cells that fight cancer and indirectly break down cancer causing substances.
Celery: Can help reduce high blood pressure.
Beetroot: Is considered the best food for your liver. It is known for its ability to cleanse the blood and improve circulation. It is also said to help in the prevention of Alzheimer's disease.
Kale: Is one of the best sources of lutein, a carotenoid, which appears to be particularly important for eye health.
Onions: Are rich in quercetin, which has shown promise in the prevention of cancer and cardiovascular disease.
Parsley and fennel: Are significant sources of myricetin, which has shown anti-allergy and anti-bacterial effects.
Apples: You can significantly reduce the risk of bowel cancer by eating just one a day.
Rhubarb root: has been used for over 2,000 years as a mild but effective herbal laxative.