Organic food is no healthier than ordinary food, a large independent review has concluded.
There is little difference in nutritional value and no evidence of any extra health benefits from eating organic produce, UK researchers found.
The Food Standards Agency who commissioned the report said the findings would help people make an "informed choice".
But the Soil Association criticised the study and called for better research.
Researchers from the London School of Hygiene and Tropical Medicine looked at all the evidence on nutrition and health benefits from the past 50 years.
Among the 55 of 162 studies that were included in the final analysis, there were a small number of differences in nutrition between organic and conventionally produced food but not large enough to be of any public health relevance, said study leader Dr Alan Dangour.
Overall the report, which is published in the American Journal of Clinical Nutrition, found no differences in most nutrients in organically or conventionally grown crops, including in vitamin C, calcium, and iron.
