Do we all have to worry that LDL causes heart disease, or could certain people, like low-carb "lean mass hyper responders" have less concern about LDL and heart risk? A new study from Dave Feldman and Dr. Matt Budoff suggests markedly elevated LDL in the setting of metabolic health and ketosis may not contribute to cardiac plaque and heart disease. While these data are not conclusive, they are highly suggestive and set the stage for future studies in this critically important area. Will this line of research eventually change everything we know about LDL? That's to be determined, but at least we're asking the question.