Intermittent fasting has become one of the most discussed dietary strategies of the last decade. Depending on which corner of the internet you inhabit, it is either a miraculous metabolic intervention that will transform your health, your longevity, and your body composition — or it is an overhyped trend with no sustainable advantages over simply eating less. The truth, as it usually does, sits somewhere more nuanced than either of those poles. And I think understanding exactly where it sits requires us to look carefully at what the research actually shows, understand the mechanisms involved, and be honest about what we still do not know.