As a Registered Dietitian working in Oncology, I would like to point out that there are studies showing that organic foods are more nutritious than conventional, and that organic diets may lower exposure to pesticides. Studies tell us that organic produce has higher levels of vitamins C and E, iron, magnesium, carotenes, and some polyphenols. (J Agric Food Chem. 2002-2004 or J Altern Complement Med. 2001;7(2):161-73.) In addition, another study in which researchers collected urine samples and diet info on preschool age children found that those eating a more organic diet had significantly lower exposure to some pesticides (Curl CL, Fenske RA, Elgethun K. Environ Health Perspect. 2003;111(3):377-82.) I do, however, agree with your final statement - that the focus should lie on eating healthier and eating less, rather than "should I buy organic?" Hundreds of studies show that the more fruit and vegetables a person eats, the lower his or her risk of cancer (World Cancer Research Fund. Food, Nutrition and the Prevention of Cancer: a global perspective. Washington, DC: American Institute for Cancer Research; 1997 -Please note the updated version is due out this year). These studies have been done on the general population (who eat conventional produce). If the harm of the pesticides outweighed the benefits, we would not see the consistent protective effects of eating fruits & vegetables. My bottom line to my patients? Focus on reaching a healthy weight (research well supports the link b/t obesity and diabetes, cancer and heart disease), get active 30 minutes or more daily (again, studies show this protects against diabetes, cancer and heart disease), eat 5-9 servings of fruits and vegetables daily, THEN worry about how to incorporate organic if available and affordable for you.
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