In 1992 a researcher at Johns Hopkins University announced the discovery of a compound found in broccoli that not only reduced the development of tumors by 60 percent in a group of study participants, it also reduced, by 75 percent, the size of the tumors that did develop. Broccoli is one of the best-selling vegetables in the United States.
Broccoli and other cruciferous vegetables are among the most powerful weapons in our dietary arsenal against cancer. Broccoli also may help boost the immune system, lower the incidence of cataracts, support cardiovascular health, help build bones, and may fight the occurrence of birth defects. Broccoli is one of the most nutrient-dense foods known; it offers a high level of nutrition for a very low caloric cost. There are only 30 calories in one cup of broccoli.
Of the ten most commonly eaten vegetables in the United States, broccoli has the highest total polyphenol content. Only beets and red onions have more polyphenols per serving.