The mantra that organic food is better for you is not backed up by scientific trials, according to a review of 223 previous studies that found little evidence for the supposed health benefits of pesticide-free, low-chemical farming techniques.
Researchers from the Stanford University School of Medicine in California analysed the findings from the prior studies, and found little significant difference in the health benefits between organic and non-organic food.
Only one nutrient, phosphorus, was found to be significantly more present in organic food compared with conventionally produced alternatives, but the researchers said this was of "little clinical significance" because few people were deficient in phosphorus.
One of the slender benefits appeared to be higher levels of heart-healthy omega-3 fatty acids in organically produced milk, according to the review, published today in the journal Annals of Internal Medicine.
The researchers said they were unable to identify fruits and vegetables that were consistently healthier when produced organically.
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