There have been studies on broccoli since the 1990’s. Scientists have found by eating broccoli and broccoli sprouts because of the significant amounts of sulforaphane (a sulfur compound was shown to have anti-inflammatory and anti-cancer benefits by killing cancer stem cells) to be the hero of the anti-cancer activity. Although broccoli is the richest sources of this potent compound, broccoli sprouts are 20 times greater than broccoli because the sprouts show more glucoraphanin (glucosinolate precursor of sulforaphane that influences carcinogenesis and mutagenesis).
Sulforaphane supports normal cell function and detachment while causing opoptosis (programmed cell death) in colon, prostate, breast and tobacco-induced lung cancer cells. Sulforaphane boosts cell enzymes that protect against molecular damage from cancer-causing chemicals.
In breast cancer, Sulforaphane reduced positive cell population from 65% to 80% in a study conducted by the National Center of Biotechnology Information. In colon and lung cancer by eating broccoli and broccoli sprouts has shown a significant reduction in cancer. In prostate cancer, by eating broccoli sprouts 4 times a week, protect men from prostate cancer. Keep in mind though that you should decrease your intake of red meat, drinking alcohol, sodium nitrate (found in processed meats, bacon, hot dogs and salami for example). Intake more fiber from whole foods, take a vitamin D supplement and eat more fruits and vegetables. Studies have shown that by eating more vegetables that are non-starchy and fruits have a lower risk of getting digestive system cancer and colorectal cancer.
You can also find other vegetables that contain sulforaphane (Kale, Brussels sprouts, Collard Greens, Cabbage, Mustard Greens, Cauliflower, Turnip, Bok Choy, Watercress, Kohlrabi, and Radishes. However, broccoli and broccoli sprouts contain the most.
Scientific proof has shown time and time again, that food is the best medicine. There is so much we can learn from Mother Nature.