Originally Posted by fatburner

Now I'm confused again. I posted a question on a recent 'metabolic advantage of low carb' thread about whether there was a difference between ketosis (exercise or dietarily induced) and burning FFA's in your mitochondria without a ketone in sight. Somebody replied with quotes from some biochem texts which stated quite clearly that FFA metabolism directly in your mitochondria is a quite distinct metabolic energy pathway to ketosis. They both end up using acetyl CoA in cells, but get there via different metabolic pathways. Ketosis is very inefficient, which makes it such a star turn for weightloss, whereas free fatty acid burning in mitochondria is a very clean burn. Particularly because direct FFA metabolism in cells does not produce lactate as a by product as glycogen does. Both metabolize fat of course, just differently. So can you be burning just fat for energy, no glycogen, and not be in ketosis at all, particularly when you low carb long term? MPS and Built, HELP!