An advance copy of a study appeared on July 29 that will be published in the September edition of the American Journal of Clinical Nutrition. The published paper, “Nutritional quality of organic foods: a systematic review,” was written by a team led by Alan Dangour at the London School of Hygiene and Tropical Medicine. The study, commissioned by the U.K. Food Standards Agency (FSA), claims that there are no differences in nutritional quality between conventional and organic foods.
The Organic Center’s chief scientist, Dr. Chuck Benbrook, along with Dr. Don Davis and Dr. Preston Andrews, have written a strong response questioning the methodology and challenging the findings of this controversial study. Click here to see their full response: http://www.organic-center.org/science.nutri.php?action=view&report_id=157.
According to Dr. Benbrook, the U.K. research team reported finding statistically significant differences between organically and conventionally grown crops in only three of thirteen categories of nutrients. Significant differences cited by the team included nitrogen, which was higher in conventional crops, and phosphorus and titratable acids, both of which were higher in the organic crops. As most scientists regard elevated levels of nitrogen in food as a potential cancer-causing agent, this finding of higher nitrogen in conventional food favors organic crops, as do the other two differences.
Despite the fact that these three categories of nutrients favored organic foods, and none favored conventionally grown foods, the London-based team concluded that there are no nutritional differences between organically and conventionally grown crops.
However, a team of scientists convened by The Organic Center (TOC) carried out a similar, but more rigorous, review of the same literature. The TOC team analyzed published research just on plant-based foods. Results differ significantly from the more narrow FSA review and are reported in the study “New Evidence Confirms the Nutritional Superiority of Plant-Based Organic Foods,” which is freely accessible on the TOC website (http://www.organic-center.org/science.nutri.php?action=view&report_id=126).
The TOC findings are similar for some of the nutrients analyzed by the FSA team, but differ significantly for two critical classes of nutrients of great importance in promoting human health – total polyphenols, and total antioxidant content. The FSA team did not include total antioxidant capacity among the nutrients studied, and it found no differences in the phenolic content in 80 comparisons across 13 studies.
Filed under: Commentary
The Organic Center’s chief scientist, Dr. Chuck Benbrook, along with Dr. Don Davis and Dr. Preston Andrews, have written a strong response questioning the methodology and challenging the findings of this controversial study. Click here to see their full response: http://www.organic-center.org/science.nutri.php?action=view&report_id=157.
According to Dr. Benbrook, the U.K. research team reported finding statistically significant differences between organically and conventionally grown crops in only three of thirteen categories of nutrients. Significant differences cited by the team included nitrogen, which was higher in conventional crops, and phosphorus and titratable acids, both of which were higher in the organic crops. As most scientists regard elevated levels of nitrogen in food as a potential cancer-causing agent, this finding of higher nitrogen in conventional food favors organic crops, as do the other two differences.
Despite the fact that these three categories of nutrients favored organic foods, and none favored conventionally grown foods, the London-based team concluded that there are no nutritional differences between organically and conventionally grown crops.
However, a team of scientists convened by The Organic Center (TOC) carried out a similar, but more rigorous, review of the same literature. The TOC team analyzed published research just on plant-based foods. Results differ significantly from the more narrow FSA review and are reported in the study “New Evidence Confirms the Nutritional Superiority of Plant-Based Organic Foods,” which is freely accessible on the TOC website (http://www.organic-center.org/science.nutri.php?action=view&report_id=126).
The TOC findings are similar for some of the nutrients analyzed by the FSA team, but differ significantly for two critical classes of nutrients of great importance in promoting human health – total polyphenols, and total antioxidant content. The FSA team did not include total antioxidant capacity among the nutrients studied, and it found no differences in the phenolic content in 80 comparisons across 13 studies.
For more information, visit http://www.organic-center.org/science.nutri.php?action=view&report_id=157.
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