Non-GMO milk comes from cows that are not fed genetically modified organisms (GMOs) in their feed. This means that the grains and other feed ingredients given to the cows do not contain genetically altered crops. Many consumers choose non-GMO milk to avoid potential health risks and environmental concerns associated with GMOs. Producers of non-GMO milk often follow strict guidelines to ensure their products meet non-GMO standards. This includes regular testing of feed and maintaining clear records of the cows' diets. Brands that offer non-GMO milk may also carry certifications from organizations like the Non-GMO Project to assure consumers of their commitment to non-GMO practices.