Well, the responses are coming in to the Stanford study that suggested that organic foods are nutritionally no better than industrially grown ones. Typically, they're like
this one over at Alternet, talking about the other benefits organic food has, like the reduction on pesticides, or how much better it is for the land.
You can't fault this--the points are all valid. And not everyone (like me) has access to the
original paper behind the paywall. Nor are all of us qualified to take on the statistical basis for the study, whether the study (particularly being a meta-study) was designed properly, or decide whether its conclusions are valid. So I said I would wait for those with the necessary academic background and standing to read the report and get back to us.
Well, Charles Benbrook, a professor of agriculture at Washington State University and former chief scientist at
The Organic Center, has had a chance to read the study and
has reported back. Some of his conclusions?
The team’s answer to the basic question “Is organic food more
nutritious or safer?” is based on their judgment of whether published
studies provide evidence of a clinically significant impact or improvement in health. Yet few studies have been designed in a way that could isolate such impacts.
From my read of the same literature, the most significant, proven
benefits of organic food and farming are: (1) a reduction in
chemical-driven, epigenetic changes during fetal and childhood
development, especially from pre-natal exposures to endocrine disrupting
pesticides, (2) the markedly more healthy balance of omega-6 and -3
fatty acids in organic dairy products and meat, and (3) the virtual
elimination of agriculture’s significant and ongoing contribution to the
pool of antibiotic-resistant bacteria currently posing increasing
threats to the treatment of human infectious disease.
The Stanford team’s study design precluded assessment of much of the
evidence supporting these benefits, and hence their findings understate
the health benefits that can follow a switch to a predominantly organic
diet, organic farming methods, and the animal health-promoting practices
common on organically managed livestock farms.
I'm grateful to Benbrook for providing a
publicly accessible copy of his paper (in .pdf format). The problem, of course, is that the response will get no where near the coverage that the press release (not even the original paper) has received. It might, had Benbrook titled his paper something like "Organic Food Study Complete Horseshit." Not, I should note, that he says that. Although, from the carefulacademic language he does use, he seems to be expressing pretty much that sentiment.
A team of plant and food scientists carried out a sophisticated
meta-analysis of the “organic-versus-conventional food” nutrient-content
literature. The team was led by Kirsten Brandt, a scientist at the
Human Nutrition Research Center, Newcastle University in the United
Kingdom. Their analysis was published in Critical Reviews in Plant Sciences
in 2011, under the title, “Agroecosystem Management and Nutritional
Quality of Plant Foods: The Case of Organic Fruits and Vegetables” (Vol.
30: 177–197).
The Stanford paper cites this analysis but does not mention its
findings, remark on the study’s scope and sophisticated methodology, nor
acknowledge the major differences in the conclusions reached.