From a nutrition standpoint, the debate over organic produce versus conventional is ongoing. A 2009 review published in the American Journal of Clinical Nutrition reported that there is no sufficient evidence of a difference in nutrient quality. But a 2007 study by Newcastle University in the United Kingdom found organic produce has 40 percent higher levels of some nutrients (including vitamin C, zinc and iron) and a 2003 study in the Journal of Agricultural and Food Chemistry found that organically grown berries and corn have 58 percent more polyphenols—antioxidants that help prevent cardiovascular disease—and up to 52 percent higher levels of vitamin C than those conventionally grown.
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