"A new report, however, says organic foods not only have fewer pesticides but also more antioxidant compounds. The findings, published in the British Journal of Nutrition, used a database of 343 previously published studies. The meta-analysis calculated that organic crops contained 18% to 69% higher concentrations of antioxidant compounds, depending on the type of antioxidant. Researchers said consumers who switch to organic fruit, vegetables, and cereals would get 20% to 40% more antioxidants.
"Organic Crops Found Higher in Antioxidants," Tufts Health & Nutrition Letter, Vol. 32, NO. 9 (Nov. 2014).