Yes, Organics are Better for You: New Study Misses the Mark

Headlines are screaming: “Organic food no more nutritious than non-organic,” “Organic food is not healthier,” “New study finds scant evidence of health benefits.” Big Ag must be rubbing its collective hands with glee. They shouldn’t.

The report stirring so much interest is a survey published in the September 4 issue of Annals of Internal Medicine. Stanford University scientists reviewed 237 studies in an attempt to answer the questions patients were asking the lead author, Dr. Dena Bravata: are organic foods better for me? Are they worth the extra cost?

Since no one had done a meta-analysis of the studies comparing conventional and organic produce, Bravata and her team set out to sift through thousands of papers in search of answers. They settled on the 237 most relevant.

What They Found: A Little Poison Is Okay

Stanford School of Medicine’s Michelle Brandt summarizes their findings: “After analyzing the data, the researchers found little significant difference in health benefits between organic and conventional foods.”

Overall, the studies found both kinds of food had similar vitamin content. Organic had more phosphorous, but few people have a deficiency in that nutrient. Protein and fat content of organic and conventional milk was similar, though the organic product delivered more omega-3 fatty acids. Organic produce contained less pesticide residue, organic meat less antibiotic-resistant bacteria. However, whether or not that was clinically significant was not clear.

None of the studies were long term, so the question of health benefits or detriments remained virtually unanswered. Those using human subjects ranged from two days to two years. Nor is it clear any of the studies compared the effects of a solely conventional or solely organic diet.

Organic produce was found to have less pesticide contamination than conventional, but none of the produce was pesticide free. Given the amount of pesticide contaminating land, water and air, that is hardly surprising.

The studies were the proverbial apples and oranges, and the researchers admit that “publication bias may be present” in some of them. That bias is what creeps in when those undertaking the study have organizational, corporate and/or monetary interest in a particular conclusion.

What They Did Not Find: Health Hazards of Conventional Systems

You can just hear the anti-organic crowd crowing and the chemical companies counting their profits. The problem is those headline writers are pouncing in ways that stretch the survey’s tepid findings all out of proportion. They are also overlooking the authors’ caveats about things they did not address, such as animal welfare, environmental impact and even the taste of organic food (unaided genetic engineering).

Those factors are huge. After all, we do not have another planet to live on once we ruin this one, and we can no longer pretend farm animals are unfeeling cogs in the wheels of industrial farming.

However, the main focus of the survey was health, so I will set those aside for this post. The survey cited in all the media reports is not a rigorous study. It is an analysis of reports that are all over the map in terms of their methodology, execution and bias.

More reliable findings can be found in the 2008 study published by the Organic Center: “New Evidence Confirms the Nutritional Superiority of Plant-Based Organic Foods.” Unlike the Stanford work, this report only referred to studies that were carefully designed and conducted. Their thorough analysis found, in part:

Yes, organic plant-based foods are, on average, more nutritious in terms of their nutrient density for compounds validated by this study’s rigorous methodology.

The average serving of organic plant-based food contains 25% more of the nutrients encompassed in this study than a comparable-sized serving of the same food produced by conventional farming methods.

Another, more rigorous study is the Rodale Institute’s 30-year Farming Systems Trial, published in 2011. They looked at soil health, yields, economics, energy and human health. Conventional systems came up short. The toxins they rely on (such as pesticides, herbicides, insecticides, fungicides) accumulate in our bodies and lead to such things as:

  • Lower math and reading skills in children
  • DNA damage, infertility, low sperm count, prostate or testicular cancer in rats
  • Brain/central nervous system disruption, breast, colon, lung, ovarian, pancreatic, kidney, testicular, and stomach and other cancers

The Cornucopia Institute Responds to the Stanford Survey

Mark A. Kastel is Senior Farm Policy Analyst for The Cornucopia Institute, a non-profit that provides some of the most reliable information on sustainable and organic agriculture. He suggests the Stanford survey overlooked some essential pieces needed for an in-depth analysis:

They discounted many of the studies, including by the USDA, that show our conventional food supply’s nutritional content has dropped precipitously over the last 50 years. This has been attributed to the declining health of our farms’ soil, and healthy soil leads to healthy food. Organic farming’s core value is building soil fertility.

Furthermore, there are many externalities that impart risk on us as individuals and as a society, which the physicians failed to look at. For example, eating organic food protects us all from exposure to agrichemicals contaminating our water and air.

Additionally, genetically modified organisms (GMOs) have become ubiquitous in processed food with an estimated 80%-90% contaminated with patented genes by Monsanto and other biotechnology corporations. The use of GMOs is prohibited in organics.

Charlotte Vallaeys, Director of Farm and Food Policy, added:

For dozens of different types of fruits and vegetables, the USDA has found pesticide residues above the EPA’s threshold for children on conventionally grown samples, but not on organic samples.

These included foods that are very popular with young children, including apples, peaches, plums, pears, grapes, blueberries, strawberries and raisins. The pesticides found as residues on these conventional fruits have been linked to higher rates of Attention Deficit Hyperactivity Disorder (ADHD) in a study by researchers at the University of Montreal and Harvard.

How Do You Choose?

We balance a lot of factors when we stand in the grocery store aisles or wander the stalls at the farmers’ market. A compromise-free life is not an option. We consider taste, nutrition, family preferences, and price. Into the mix go environmental costs, farm workers’ rights and animal welfare.

The Stanford survey feels like a flawed assessment of whether or not organic and conventional are comparable. Still, those involved in it sifted through mounds of papers and settled on those they considered most relevant. There are too many holes in their findings to influence my thinking, but I acknowledge I am already in the organic camp and intend to stay there. For me, the impact of conventional farming on the environment is unacceptable. Besides, I’ve been a farmer, and I am grateful to the people who are working so hard to provide me with high quality, sustainably grown food. I am willing to pay more to support them.

Care2 readers are a thoughtful, articulate and opinionated lot. How do you choose your food? What factors are most important to you? What compromises are you willing to make? What lines do you refuse to cross?

Related Care2 Stories

Is Organic Agriculture Bad for the Environment? Another Reason to Eat Locally

From Roadside Stand to International Organic Company

Eat Organic? You Might Be a Jerk

What’s Big Food Doing in the Organic Business?


Photos 1 and 2: Thinkstock; Photo 3 from Secret Tenerife via Flickr Creative Commons


Jim Ven
Jim Ven2 years ago

thanks for sharing.

Fred Hoekstra
Fred Hoekstra5 years ago

Thank you Cathryn, for Sharing this!

Cutter Two Wheels

thank you for writing a very in-depth, intelligent, and seemingly non-biased (until the last paragraph) commentary on the stanford report. i had yet to see a response that didn't just say "no, that's not true! the report is stupid!" i only buy usa produce, and a good 75% or more of which i insist on being organic. i try for local as much as possible, and my co-op is very good about keeping me supplied with food from nearby. coming from a deeply agricultural background, i am extremely concerned about farm laborer's welfare. i grow a lot of my own food, but plenty of staples in a modern diet are just not convenient or cost effective enough for me to produce from my tiny urban landscape. it's a constant battle with many setbacks, but the important thing is to know you're doing the absolute best you can.

Stephanie F.
Stevie A6 years ago

Alex H. - Yeah, I wondered who funded the study too. James K. - Thank you for your amazing, thorough rebuttal to the "Stanford study". Linda J. You are an inspiration in terms of your smaller footprint.
Here in CA we are fighting to get GMO-containing products LABELED. Of course, MONSANTO is spending MILLION$ to defeat "YES on 37". If you have family or friends who live here, please ensure that they know about "YES on 37" We are going to take Monsanto DOWN.

Alex H.
Alex H6 years ago

It deeply disturbs me to see a study like this being given any credence at all.Who paid for it??!!There is an insidious worldwide agenda in the media attempting to undermine peoples' faith in organic food,and the reason is,the push to force GM food down our throats!!Our food choices are being undermined and this is unconscionable.Corporate greed is out of control and we will all suffer illhealth,and possibly liver failure and death,as a result.Why the fight against proper labelling?What are they hiding??Read Jeffrey Smith's confronting books and find out;it's shocking!

James Klug
James Klug6 years ago

Wow...I cut my comment in half and it STILL won't print the whole thing! Here's the final paragraph in full:

Noting that most of America is woefully math challenged (not to mention logic and critical thinking challenged), it certainly appears to me that the researcher either deliberately structured the risk difference outcome to make the average person believe that the risk difference is much lower than it actually is - OR, the researcher is devoid of basic math, logic and statistical calculation skills. In other words, the researcher is either dishonest or incompetent...either one of which is enough to completely discredit any other information contained in the study and making the entire study worthless.

James Klug
James Klug6 years ago

The key component of the Stanford report is in its methodology of determining the “Risk Difference”. The risk difference calculation fails the common sense (not to mention mathematical) test. One incidence is 5%, the other is 35% and the risk difference is 30%? What nonsense! The absolute difference may be only 30%, when simply subtracting one number from the other, but the effective difference is far, far greater.

Contained in the article is the analysis of the study done by Professor Charles Benbrook, who states that the method of calculating the Risk Difference is an “unusual and unfamiliar metric” – and my limited research into the methodology of calculating risk supports his statement. His analysis was linked in the article, but here’s it is again for you to look at.

While Professor Benbrook calculated the difference one way, here’s another one that may make it clearer. Consider a situation where you are making 5% on $1000 and 35% on another $1000. The absolute difference between the two percentages obtained by simply subtracting one number from the other is 30%, certainly…but the difference between $50 and $350 is definitely not 30%! In reality, $50 is only about 15% of $350, so the real difference between the $50 and $350 is 85%…which is exactly what Professor Benbrook points out using his method of calculation.

James Klug
James Klug6 years ago

Continued from above:
In a way, Professor Benbrook also understates the difference, depending on how you look at it. Certainly 5% is only 15% of 35%, so the difference can be stated as 85%...but 5% is also only 1/7 of 35%, so if you have 5 instances in once case and 35 instances in another case, the higher amount is actually 7 times (700%) of the lower amount. When we're using statistics, as in so many things, the framing of the argument is the key...and that illustrates the accuracy of the famous Mark Twain quote "There are 3 kinds of lies. Lies, Damned Lies and Statistics".

As both Professor Benbrook and I have noted, using different forms of calculation, the risk difference claims made in the study are totally without merit in regard to the data in question - regardless of what other applications to which that kind of analysis may be valid - although I confess I can't think of any that would be.

Noting that most of America is woefully math challenged (not to mention logic and critical thinking challenged), it certainly appears to me that the researcher either deliberately structured the risk difference outcome to make the average person believe that the risk difference is much lower than it actually is - OR, the researcher is devoid of basic math, logic and statistical calculation skills. In other words, the researcher is either dishonest or incompetent...either one of which is enough to completely discredit any other information contained in the study and making th

Nils Lunde
PlsNoMessage se6 years ago

thank you

Lourdes A.
Lourdes Acevedo6 years ago

My advice to all is Grow what you consume. It's the only way you'll know what is truly not in it!!