Brit Study Says Organic Grass-Eating Cows Give Healthiest Milk

"A new study (from Newcastle University) gives reinforcement to the idea that organically-produced milk is healthier than regular milk. The study showed organic (summertime) milk had 67 percent higher levels of vitamins and antioxidants, and 60 percent more conjugated linoleic acids than regular milk. It also had higher levels of good Omega-3s and lower levels of Omega-6s than conventional milk. The key was the grass factor - organic cows tend to get a lot more grass and clover, conventional cows get more grain"

http://www.treehugger.com/files/2008/05/brit-study-says-organic-grass-milk-healthier.php