As lawmakers concerned with problems as diverse as childhood obesity, animal cruelty, and listeria have increasingly focused their attention on consumers, legal issues surrounding food choice have recently attracted much broader interest. Bans on large sodas in New York City, fast food chains in South Los Angeles, and foie gras in California and Chicago have provoked national controversy, as have federal raids on raw milk sellers. In response, various groups have decried restrictions on their ability to consume the food products of their choice. A few groups have organized around the principle of what we might call liberty of palate, and one commentator has even suggested, based on some old Supreme Court dicta, that a fundamental substantiv...