The new analysis repeats some of th

The new analysis repeats some of the Stanford group's findings. It finds that organic and conventional vegetables offer similar levels of many nutrients, including minerals, vitamin C and vitamin E. Conventional crops are higher in protein. And there are fewer pesticide residues on organic foods, as you'd expect.

But the group found a significant difference in the levels of special compounds called antioxidants. "Across the important antioxidant compounds in fruits and vegetables, organic fruits and vegetables deliver between 20 and 40 percent higher antioxidant activity," says Charles Benbrook, from Washington State University's Center for Sustaining Agriculture and Natural Resources, a co-author of the study.