"Grain-fed" refers to livestock, particularly cattle, that are primarily fed a diet of grains, such as corn and soy, rather than grass or forage. This feeding method is common in commercial farming, as it can lead to faster weight gain and more marbled meat, which is often preferred for its flavor and tenderness. The grain-fed approach contrasts with grass-fed practices, where animals graze on pasture. While grain-fed beef is typically more affordable and widely available, some consumers prefer grass-fed options for perceived health benefits and ethical considerations regarding animal welfare and environmental impact.