Grass-fed dairy cows produce milk that's up to five times higher in conjugated linoleic acid, which correlates with lower heart-attack risk in humans, according to Harvard researchers. Plus, organic milk contains more vitamin E, beta-carotene, omega-3 fatty acids, and lutein than milk from conventionally raised cows, according to the Organic Consumers Association. Organic dairy products do not contain milk from cows that have been given growth hormone or antibiotics, says Canfield.
Shop smart: We know--organic is expensive. If you can't swing the prices, you can still skip the hormones by shopping for dairy that says, "no artificial hormones or antibiotics used" on the label, Canfield says.
