There is an ever-increasing amount of medical research demonstrating that certain green foods can really contribute to preventing certain types of cancer like breast cancer, colon cancer and prostate cancer.
The specific foods are part of group of vegetables known as cruciferous vegetable. They are called cruciferous because the pedals or heads of the plants look like crosses. The best examples are: broccoli, broccoli sprouts, brussels sprout, kale, and though not green, cauliflower.
These vegetable are a source of sulphur containing compounds that have been shown to not only prevent these types of cancers but even slow their growth if they have already occurred. Although boiling reduces the level of the anti-cancer compounds, steaming, microwaving and stir frying does not result in significant loss. These vegetables are also low in cholesterol, calories and fat.
Try to include a few ounces of the vegetables at least 5 times a week in your diet.