March 20th, 2010

Farmers, food producers, and scientists debate whether organically grown and produced fruits, vegetables, meats and milks are more nutritious than conventional ones.

The Organic Center (TOC), a nonprofit research organization in Foster, Rhode Island, recently issued a review of 97 studies on the subject to draw the conclusion that organic foods, on average, offer a 25 percent higher nutrient level over conventional ones. The premium may be an extra measure of a nutrient like vitamin C or higher levels of compounds like antioxidants, which are produced by plants to act as natural pesticides. The TOC is a pro-organic organization, so it’s not surprising they found a nutritional edge. However, their review is complemented by emerging research from independent scientists. For example, University of California at Davis researchers have found higher levels of nutrients in organic tomatoes, kiwifruit, corn, and strawberries grown side-by-side with conventional versions.

Because this research is preliminary, most major public health organizations like the American Dietetic Association and the Mayo Clinic hold that an organic label is not an assurance that a food is nutritionally superior. What’s more, organic sweets and snack foods don’t warrant a nutritional halo just because they’re organic. In excess, fat, sugar, and calories can have adverse health effects, whether or not the food that contains them is organic.