A physician and former White House health adviser has drawn on two decades of nutritional research to make a quietly radical argument: that guilt, more than ice cream, may be the greater enemy of a healthy life. Dr. Ezekiel Emanuel's new framework for longevity rests not on deprivation but on the older, harder discipline of moderation — inviting people to reconsider what it means to live well when the evidence itself defies expectation. The ice cream finding, counterintuitive and still unexplained, serves as a kind of parable: that our inherited certainties about health may be as much cultural