The new studies found that organic tomatoes had more vitamin C, beta-carotene and flavonoids, which are known to help against cancer and heart disease, though they also had less lycopene, which is thought to help prevent skin ageing, diabetes and osteoporosis. Organic apple puree was found to contain more phenols, flavonoids and vitamin C than non-organic versions.
"This research shows there are benefits," said Dr Kirsten Brandt of
Peter Melchett, policy director of the Soil Association, welcomed the new research. He said: "There is clear evidence that a range of organic foods contain more beneficial nutrients and vitamins and less of things known to have a detrimental health effect."
The study follows
The French element of the latest study looked at organic peaches and found they had "a higher polyphenol content at harvest" and concluded that organic production had "positive effects ... on nutritional quality and taste". Researchers at
Dr Brandt's work on organic produce included a focus on a natural pesticide in carrots, falcarinol, which is believed to reduce cancer tumours. This led her to conclude two years ago that a raw carrot eaten each day might be better than the recommended five portions of fruit and vegetables.
Sales of organic food rose by 30 per cent last year to £1.6bn. But until now the health benefits of organic food have been the subject of conjecture. Last September, the Food Standards Agency refused to issue official guidance highlighting the benefits. It said that while it accepted higher levels of nutrients might exist they were of less value than long-chain fatty acids.
The debate intensified last month when a report for the Department for Environment, Food and Rural Affairs found "many" organic products had lower ecological impacts than conventional methods using fertilisers and pesticides. But the study said other organic foods - such as milk, tomatoes and chicken were significantly less energy efficient and could be more polluting than intensively farmed equivalents.
(By Ian Herbert, The Independent,