Sustainability is the latest ingredient to be mixed in to the nutrition policy making process. It is also a topic that the Dietary Guidelines Committee has addressed this year by creating a subcommittee dedicated to this issue.We've commented frequently on the new consumer trends in food consumption and political directions that impact food production. In the past two years, major grocery and restaurant chains have started to move to battery cage-free eggs and broilers and gestation crate-free pork, while a number of state laws have also implemented bans on specific production practices. Grass-fed beef remains a popular, although untenable, standard for healthy eating. Men's Health magazine calls grass-fed beef a food with "superpowers," a...