Yes, spinach everyday!
http://www.sciencedaily.com/releases/2012/06/120620213215.htm
Researchers at Oregon State University have for the first time traced the actions of a known carcinogen in cooked meat to its complex biological effects on microRNA and cancer stem cells.
The scientists also found that consumption of spinach can partially offset the damaging effects of the carcinogen. In tests with laboratory animals, it cut the incidence of colon tumors almost in half, from 58 percent to 32 percent.
