Tests on supermarket chicken breasts found organic varieties contained fewer omega-3 fatty acids and lower levels of antioxidants, giving the meat an inferior taste. Some were found to contain twice as much cholesterol.

The study, by food scientists at Strathclyde University, contradicts the common view that the premium paid for organic meat guarantees a healthier and tastier product.

Despite costing twice as much, the organic products scored lower in all the nutritional tests in the study, “It is safe to say that you are not getting any nutritional benefit from buying organic chicken,” said Alistair Paterson, co-author of the study, which is published in the International Journal of Food Sciences and Nutrition.

“You could be better off buying conventional or free-range chicken. There is no guarantee that organic chicken gives you more omega-3, better taste or a lower cholesterol level.”

Organic food, which is produced according to standards covering the use of pesticides, additives, animal welfare and sustainability, has become big business with sales in the UK doubling in six years.

Last year, the market was worth £1.6 billion, up from £800m in 2000, according to Datamonitor, the market research firm, and is forecast to be worth £2.7 billion by 2010. However, there are growing concerns that the increasing industrialisation of organic farming to meet demand has led to a dilution of its green credentials and quality.

The Strathclyde team found that organic chicken was lower in antioxidants than conventional or free range chicken and, in blind tastings, scored lowest for succulence.

According to Paterson, the differences in taste and nutritional composition are due to the feed the animals are given. Synthetic vitamin supplements are standard in conventional feed but are prohibited under organic farming rules.

The Soil Association, representing organic producers, insisted that organic standards were not being compromised.

“This research contradicts the bulk of evidence which shows organic food is higher in omega-3, vitamins and minerals than conventional chicken,” said Hugh Raven, director of Soil Association Scotland.

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