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Annals of Internal Medicine tip sheet for Sept. 4, 2012
Date:9/3/2012

1. No Nutritional or Safety Differences Between Organic and Conventional Foods

There is generally no difference in nutritional value or risk for bacterial contamination between organic and conventional foods, according to a new study being published in Annals of Internal Medicine, the flagship journal of the American College of Physicians (ACP). While the consumption of organic fruits and vegetables reduced exposure to any detectable pesticide residues by 30 percent, pesticide levels were generally within the allowable limits for safety.

Researchers conducted a systematic review of 17 human studies and 223 studies of nutrient and contaminant levels in unprocessed foods such as fruits, vegetables, grains, milk, eggs, chicken, pork, and meat to compare the health, nutritional, and safety characteristics of organic and conventional foods. They found that the published literature lacks strong evidence that organic foods are significantly more nutritious than conventional foods.

"Some believe that organic food is always healthier and more nutritious," said Crystal Smith-Spangler, MD MS, a VA Physician Fellow at CHP/PCOR, and lead author of the paper. "My colleagues and I were a little surprised that we didn't find that."

The researchers did find weak evidence of the nutritional superiority of organic foods in that organic produce contained significantly higher levels of total phenols, a compound that may have antioxidant properties, and that organic milk and chicken contained significantly higher levels of omega-3 fatty acids. However, the researchers concluded that since few people have phosphorous deficiency, the finding has little clinical significance.

Sales of organic foods have increased dramatically is the US. Between 1997 and 2010 organic food sales have risen from $3.6 billion to over $26 billion annually. Prices vary, but consumers my pay up to twice as much for organic foods versus conventional.
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Contact: Angela Collom
acollom@acponline.org
215-351-2653
American College of Physicians
Source:Eurekalert

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