What we eat is as important as what the animal ate before we ate it!  Produce from Grass-fed cattle generally means cattle that eat only grass and other foraged foods throughout their lives grazing in their natural habitats. Often, conventional cattle eat a diet that includes grains, such as corn. The difference in the diets of the cattle changes the nutrients and fats produced by the cattle. Consuming products from grass-fed cattle is not only more ethical but studies suggest that it may be healthier for humans. When cattle exclusively eat grass, the CLA levels in their meat and milk are typically 300 to 500 percent higher than in those fed an unnatural grain-based diet. You simply won’t find these levels of leucine and CLA in regular whey protein powder. Only whey from cattle who graze on green pastures contain these quantities of valuable substances.