Rapid Keto X Terms of understanding how ketogenic diets can be used to markedly improve some chronic diseases. We understand not just what they do, but how they do it at the molecular level. And this is important in terms of moving this field forwards, and making optimum use Rapid Keto of this state we call nutritional ketosis. Where did nutritional ketosis come from, and why did we have to define that as a term? Over a century ago doctors figured out that.