Health Benefits of Organic Food
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HIGHER NUTRIENT LEVELS
It’s often claimed that a large number of studies have found no difference in the nutrient content of organic and non-organic crops. It’s true there have been more than a hundred studies comparing the nutrient content of organic and non-organic foods and the results are inconclusive. But this is because the majority of studies are of poor quality, being either agriculturally or analytically flawed.
I reviewed the literature using clear validity criteria to ensure relevant nutrients were being compared in properly matched organic and non-organic crops. This eliminated 72% of 
comparisons as invalid. The results of these spurious studies were either dramatic, inconclusive, non-significant or inconsistent, as would be expected, and served only to obfuscate the clear trend in the valid data that organic crops, on average, do contain higher levels of trace minerals, vitamin C, and antioxidant phytonutrients.
Official food composition tables, including data compiled by the US Department of Agriculture, reveal that since the 1940s the mineral levels in fruits, vegetables, meat and dairy have declined substantially in conventional foods. Combine this with earlier (pre-ripened) picking, longer storage, and more processing of crops, and it’s not surprising that we may be getting fewer nutrients in our food than we were 60 years ago.
The artificial fertilization associated with conventional crops produces lush growth by swelling produce with more water. On a pound-for-pound basis, organic food has more “dry matter” (i.e. food). Partly because of this (and for other reasons too), there are higher levels of nutrients in organic produce. Research by American nutritionist Virginia Worthington has confirmed that, based on current dietary patterns, the differences can be enough to help you achieve the recommended daily allowances for certain nutrients that you otherwise may not get.
We can expect also that phytonutrients, many of which are antioxidants involved in the plant’s own defense system, will be higher in organic produce because crops rely more on their own defenses in the absence of regular applications of chemical pesticides. Evidence is emerging that confirms this expectation. Higher levels have so far been found of lycopene in organic tomatoes, polyphenols in organic potatoes, flavonols in organic apples, and resveratrol in organic red wine. A recent review of the subject estimated that organic produce will tend to contain 10-50% higher phytonutrients than conventional produce.
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