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Choosing organic milk could offset effects of climate change
Date:1/16/2011

Wetter, cooler summers can have a detrimental effect on the milk we drink, according to new research published by Newcastle University.

Researchers found milk collected during a particularly poor UK summer and the following winter had significantly higher saturated fat content and far less beneficial fatty acids than in a more 'normal' year.

But they also discovered that switching to organic milk could help overcome these problems. Organic supermarket milk showed higher levels of nutritionally beneficial fatty acids compared with 'ordinary' milk regardless of the time of year or weather conditions.

The study, which is published in this month's Journal of Dairy Science (January 2011), leads on from previous research undertaken nearly three years ago which looked at the difference between organic and conventional milk at its source on the farms.

"We wanted to check if what we found on farms also applies to milk available in the shops," said Gillian Butler, who led the study. "Surprisingly, the differences between organic and conventional milk were even more marked. Whereas on the farms the benefits of organic milk were proven in the summer but not the winter, in the supermarkets it is significantly better quality year round."

There was also greater consistency between organic suppliers, where the conventional milk brands were of variable quality.

"We were surprised to see obvious differences between the conventional brands, with the more expensive ones not necessarily better," said Mrs Butler. "Some brands - which promote their suppliers as wholesome and grazing on fresh pastures - actually sold milk that appeared to be from very intensive farms."

Low levels of omega-3 and polyunsaturated fatty acids were discovered in some of these brands, which are indicative of a diet low in fresh grass. These samples also showed evidence of the cows being supplemented with a saturated fat product deriv
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Contact: Sarah Cossom
press.office@ncl.ac.uk
01-912-226-067
Newcastle University
Source:Eurekalert  

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