According to the Food and Safety Inspection Services (FSIS), the “100% Grass-Fed” label means the meat comes from cattle that were exclusively fed a forage-based diet.

What exactly do those grain-fed and grass-fed labels on beef mean? We spoke to experts to get the lowdown on how these two types of beef compare to one another.

The foods that a cow eats can significantly affect its meat’s nutrient composition. This article explains the difference between grass- and grain-fed beef.

At the U.S. average of 1,763 pounds of grain per person annually for food and feed, ... over half of all beef cattle weight gain comes from grass rather than grain.

It's a simple numbers game: Cattle, for example, consume a shocking 17 times more grain calories than they produce as meat calories. All that lost grain (which humans could have eaten) requires water.

Niman Ranch cattle are finished on a blend of grain—including barley, corn, soy beans, and distiller’s dry grain—along with plenty of roughage, which makes the grain easier on bovine stomachs.

The pounds of feed (grain, forage, etc.) a dairy cow needs to eat to produce 100 pounds of milk has decreased by more than 40% on average in the last 40 years. ... A whopping 40% of all food grown and ...

It's a simple numbers game: Cattle, for example, consume a shocking 17 times more grain calories than they produce as meat calories. All that lost grain (which humans could have eaten) requires water.