A study presented in proceedings of the National Academy of Sciences, USA, indicates that broccoli, grown under the right conditions, contains sulforaphane glucosinolate (SGS), a substance that may boost the body’s natural defense systems against cancer and even kill cancer cells. But you would have to eat pounds of broccoli to get enough SGS to be effective. Continued food research by John Hopkins University, Baltimore, and the USDA, however, found that three-day-old broccoli seedlings contain a concentrated amount of SGS — 20 times the amount found in broccoli — so only an ounce provides the same benefits. Sold as BroccoSprouts, the seedlings are grown under controlled conditions to ensure SGS content, and can be used on salads, sandwiches and omelets for a “zingy” taste. They have been patented by John Hopkins University, and 19 growers nationwide are licensed to grow them. BroccoSprouts are available in select grocery and health food stores nationwide.

Q : The best heading for this passage is _______