A University of California, Davis, study of organically grown corn, strawberries, and marionberries found that they contained higher levels of natural cancer-fighting compounds than conventionally grown samples. Pesticides and herbicides used on conventional produce appear to impede the production of phenolics, which defend plants from insects and people from disease.
Levels of antioxidants in organically grown corn were 58.5 percent higher than conventionally grown corn with organic marionberries and strawberries showing marked increases as well (50 and 19 percent, respectively).
“Certified organic” crops are not genetically engineered, irradiated, or fertilized with sewage sludge. The land on which they are grown must also be free of pesticides and herbicides for three years prior to planting.