Grass-fed beef not only is lower in overall fat and in saturated fat, but it has the added advantage of providing more omega-3 fats. These crucial healthy fats are most plentiful in flaxseeds and fish, and are also found in walnuts, soybeans and in meat from animals that have grazed on omega-3 rich grass. When cattle are taken off grass, though, and shipped to a feedlot to be fattened on grain, they immediately begin losing the omega-3s they have stored in their tissues. As a consequence, the meat from feedlot animals typically contains only 15- 50 percent as much omega-3s as that from grass-fed livestock.

In addition to being higher in healthy omega-3s, meat from pastured cattle is also up to four times higher in vitamin E than meat from feedlot cattle, and much higher in conjugated linoleic acid (CLA), a nutrient associated with lower cancer risk.

"We have succeeded in industrializing the beef calf, transforming what was once a solar-powered ruminant into the very last thing we need: another fossil-fuel machine." Micheal Pollan