Broccoli that lowers LDL by 6% was bred to contain 2-3x more glucoraphanin which changes metabolic gene expression.

FTA:

Including a new broccoli variety in the diet reduces blood LDL-cholesterol levels by around 6 percent, according to the results of human trials. The broccoli variety was bred to contain two to three times more of a naturally occurring compound glucoraphanin. It is now available in supermarkets in England, under the name Beneforte.