Robert F. Kennedy Jr. sure loves whole milk. Last fall, his health administration declared that the "war" on whole milk was over. More recently, he posted an A.I.-generated video of himself drinking whole milk and dancing, his upper lip adorned with a milk mustache. His new dietary guidelines prominently recommend whole milk. Specifically, the guidelines advise that Americans should eat three servings of "full-fat" dairy each day: "Dairy is an excellent source of protein, healthy fats, vitamins, and minerals."