Your genes could mean that eating broccoli to help protect against cancer may not be enough - what you need is “super-broccoli.” Researchers have found around half the population don’t have the right genes to fully benefit from eating the green vegetable. They retain the cancer fighting chemical sulforaphane for only a few hours. But they could compensate for the difference in their genetic make-up by eating the super variety, with higher levels of the active plant chemical sulforaphane.