There's Now a Way to Tell If Milk Is From 100% Grass-Fed Cows

  • Organic Valley, Maple Hill spearheaded a certification program
  • Seal will appear on products in grocery stores in 2019
Quarts of Dean foods Co. Organic Valley brand milkPhotographer: Gaia Squarci/Bloomberg
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Consumers have been shelling out premiums for organic dairy products from grass-fed cows. But for the most part, there wasn’t a way to tell whether those cows had eaten a few blades of grass or an exclusive grass diet.

Now, Organic Valley and Maple Hill have come up with a third-party certification standard for grass-fed products, one of the fastest-growing categories in dairy. To obtain the seal, cows must have a 100 percent grass diet with zero grains, and have plenty of pasture for grazing. There’s also a full supply chain verification. Only certified organic farms can participate.