New research in the latest issue of the Society of Chemical Industry's (SCI) Journal of the Science of Food and Agriculture shows there is no evidence to support the argument that organic food is better than food grown with the use of pesticides and chemicals
Many people pay more than a third more for organic food in the belief that it has more nutritional content than food grown with pesticides and chemicals.
But the research by Dr Susanne Bügel and colleagues from the Department of Human Nutrition, University of Copenhagen, shows there is no clear evidence to back this up.
In the first study ever to look at retention of minerals and trace elements, animals were fed a diet consisting of crops grown using three different cultivation methods in two seasons.
The study looked at the following crops – carrots, kale, mature peas, apples and potatoes – staple ingredients that can be found in most families' shopping list.
The first cultivation method consisted of growing the vegetables on soil which had a low input of nutrients using animal manure and no pesticides except for one organically approved product on kale only.
The second method involved applying a low input of nutrients using animal manure, combined with use of pesticides, as much as allowed by regulation.
Finally, the third method comprised a combination of a high input of nutrients through mineral fertilisers and pesticides as legally allowed.
The crops were grown on the same or similar soil on adjacent fields at the same time and so experienced the same weather conditions. All were harvested and treated at the same time. In the case of the organically grown vegetables, all were grown on established organic soil.
After harvest, results showed that there were no differences in the levels of major and trace contents in the fruit and vegetables grown using the three different methods.
Produce from the organically and conventionally grown crops were then fed to animals over a two year period and intake and excretion of various minerals and trace elements were measured. Once again, the results showed there was no difference in retention of the elements regardless of how the crops were grown.
Dr Bügel says: 'No systematic differences between cultivation systems representing organic and conventional production methods were found across the five crops so the study does not support the belief that organically grown foodstuffs generally contain more major and trace elements than conventionally grown foodstuffs.'
Dr Alan Baylis, honorary secretary of SCI's Bioresources Group, adds: 'Modern crop protection chemicals to control weeds, pests and diseases are extensively tested and stringently regulated, and once in the soil, mineral nutrients from natural or artificial fertilisers are chemically identical. Organic crops are often lower yielding and eating them is a lifestyle choice for those who can afford it.'
Comments
The actual source
September 7, 2008 by Anonymous, 1 year 8 weeks ago
Comment id: 31851
FYI - the actual source is the University of Copenhagen. Dr Susanne Bügel and colleagues from the Department of Human Nutrition, University of Copenhagen, were the ones who did the study. SCI just published the results.
Of course there are no more nutrients in “organic†food. All food is organic; the difference is in the process of growing the food, not what it is made of genetically. I like pesticides; they keep the arthropods away from my food.
The actual source
September 7, 2008 by Anonymous, 1 year 8 weeks ago
Comment id: 31850
FYI - The actual source is the University of Copenhagen. Dr Susanne Bügel and colleagues from the Department of Human Nutrition, University of Copenhagen, were the ones who did the study. SCI just published the results.
Of course there are no more nutrients in “organic†food. All food is organic; the difference is in the process of growing the food, not what it is made of genetically. I like pesticides; they keep the arthropods away from my food.
I do it for the lack of chemicals
August 15, 2008 by Anonymous, 1 year 12 weeks ago
Comment id: 31527
I don't believe organic has more nutrients, I believe they have less harmful chemicals. Did they test for retention of pesticides in the animals for the study?
Consider the source
August 15, 2008 by Anonymous, 1 year 12 weeks ago
Comment id: 31525
If you just look at who posted this entry: Society of Chemical Industry's (SCI) Journal of the Science of Food and Agriculture .. it might make you wonder what vested interest this journal has in the argument. Let's see, if I was part of the CHEMICAL INDUSTRY, don't you think I would want to knock the idea that organic is better, since I sell chemicals? All the latest studies point to organic foods having higher nutritional value. In addition, people buy organic for a number of other reasons, including: not wanting chemicals in their bodies, the studies showing pesticides showing up in breast milk, not wanting to pollute the soil and water. Buying organic makes sense, plain and simple.
I do it for the environment
August 12, 2008 by Anonymous, 1 year 12 weeks ago
Comment id: 31491
I don't necessarily think that organic produce is healthier to eat than the conventionally grown. I just don't want to support big chemical corps that pollute the aquifers and oceans with too many pesticides & fertilizers. I'd wager that 70% of it is simply unneeded.
Taste?
August 8, 2008 by Anonymous, 1 year 12 weeks ago
Comment id: 31447
You need to (re-)watch the episode of Penn & Teller where they were tasting mineral water...
No Pesticides
August 8, 2008 by Anonymous, 1 year 12 weeks ago
Comment id: 31445
And how much pesticide residue does the non-organic contain?
Why is this study on Science Blog?
August 8, 2008 by Anonymous, 1 year 13 weeks ago
Comment id: 31433
First of all, this is a very misleading title for the content below. The study measured “major and trace elements†and equated that with “nutritional contentâ€. Sorry. Thank you for playing but there’s more manure than what was put in the field. Proteins, carbohydrates, vitamins, amino acids and antioxidants are recognized components of nutrition, but their study didn’t measure these so I don’t think they are justified making claims about “nutritionâ€.
I’m starting a fruit business and I’m and learning that there are many types of organic growing--and the crop, type of soil and style and diligence of the farmer all have bearing on yield and overall quality of the end product. So, were they doing mono or polyculture? Till/no till? Subirrigation? Cover crops, tillage or mulch for weed management? What was the previous crop? More importantly, who did the organic growing? The organic farmer or someone else?
I also have a BS in science--about half in biology--and have gotten some of my best lessons from these guys. Believe me, until you’ve spent a few evenings listening to successful organic farmers describing the 6-8 crop rotation that each has developed and how each rotation contributes to the timing and quantity of nutrients for the next crop, you can’t possibly have enough respect for how smart they are.
By the way, Dr. Baylis, there is a lot of evidence that shows the yields of organic crops to be comparable to their “conventional†counterparts and when the costs of the inputs are considered, they actually cost less to produce. Please stop repeating what you’ve been told and look.
http://scienceblog.com/community/older/2005/8/200507248.shtml
http://www.newscientist.com/article.ns?id=dn2351
www.sciencedaily.com/releases/2008/03/080325101134.htm
Last, in its time DDT was “extensively tested and stringently regulated†and 40 years later there are still measurable quantities in the environment. But then again, this study wouldn’t have considered DDT as an impact on “nutritiion†since it isn’t a major or trace element.
Frankly, I’m surprised to find a study of this quality on Scienceblog.
fertilizers are not identical
August 7, 2008 by Anonymous, 1 year 13 weeks ago
Comment id: 31426
"mineral nutrients from natural or artificial fertilisers are chemically identical"
That is a misleading statement. Putting synthetic nitrogen fertilizer on a field is not the same as adding manure. Manure has a whole range of minerals in it, major and trace. You can't replicate that with synthetic fertilizer.
No evidence to support 'organic is best'?
August 7, 2008 by Anonymous, 1 year 13 weeks ago
Comment id: 31425
If it not bacteria than it's chemicals you need to worry that is found on on your produce!!
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Absolutely right to question the source
August 7, 2008 by Anonymous, 1 year 13 weeks ago
Comment id: 31424
Without commenting on the methodology, it's good to question the source of studies.
Yeah...
August 7, 2008 by Anonymous, 1 year 13 weeks ago
Comment id: 31421
...I'm sure the Society of Chemical Industry can be 100% trusted to publish a totally factual article supporting non-organic farming.
That said, they kind of ignored the ecological impact of the farming methods completely. If all the food has the same nutrients (a conclusion I'm NOT willing to grant based on this study, in case that wasn't clear), but two of the three methods damage the ecology in and around the farm itself, I think there's kind of a clear winner *anyway*.
Plus? TASTE. Anybody who's actually compared produce grown with and without chemical additives doesn't need a study to tell them which is better!
'organic is best'
August 7, 2008 by Anonymous, 1 year 13 weeks ago
Comment id: 31416
I buy organic because it contains no pesticides, not because of mineral content. Corresponding benefits of organic farming for biodiversity and human health are proven I understand, e.g. http://www.uea.ac.uk/~b033/Does_organic_farming_benefit_biodiversity.doc
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