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Keto Dieting Does Not Cause Muscle Loss: Here’s Why (Keto Science) – Thomas DeLauer… So, a lot of people will tell you that the ketogenic diet is going to make it so that you lose a lot of muscle. Well I’m here to give you the science. Both men and women have been hitting me up consistently saying that they’re afraid or they’re trepidatious to start the ketogenic diet because they’re afraid of ketabolizing, breaking down muscle tissue.
Well, what I want to do in this video, is break down a few different scientific research papers, but I also want to give you the detailed science. I want to give you the understanding and the physiology behind what’s happening within the body. So first off, let me address why people are usually concerned. People usually think that our body is just going to break down our existing protein tissue in an effort to create carbohydrates. Here’s what happens. Our bodies don’t have the ability to break down fat and turn it into carbohydrates. We have systems in our body that either run on fats, or they run on carbs. Some can run on both, but not all. This is where people start to get concerned, because you see, the body cannot break down fats into sugars, but it can break protein down into sugars, and since there are specific cells in our bodies that require glucose, people jump to conclusions and think that the only logical thing the body’s going to do is break down protein and break down muscle. Thusly, they think that the ketogenic diet, although they may lose fat, they think they’re going to lose muscle, too, and it makes completely valid sense, and I totally understand.
But that’s why I wanted to do this video, to help you understand it a little bit more. You see, our body always needs a little bit of glucose, no matter what. Our brain requires a little bit, we have specific cells in the body called erythrocytes that need glucose, we have specific kidney cells, renal cells that need glucose. We’ll never be in a state where we don’t have glucose at all. Our body will always find a way to have it, but what ends up happening is on the ketogenic diet, when you have enough ketones being produced, meaning you’re eating enough fat, and your liver’s actually producing the ketones, it’s producing the fat energy, then what ends up happening is that goes to the tissues that can run on both. Like the brain, for example. The brain can run on fats and glucose.
So what happens is the brain starts to use the fats, instead, and the glucose from the brain travels through other areas of the body. So really, the ketones and the fats displace the glucose. They don’t just completely replace, they displace. So now, the glucose can go over to the erythrocytes, it can go to the kidney cells, and it can do its job. We don’t have to break down muscle tissue to get to that point. We have the glucose already available. It’s always going to be there. We will break down a little bit of protein, but it doesn’t have to come from muscle.
But here’s the other really cool thing that happens. We’re going to go back to biology class. You may not even remember this. There’s something called the CORI cycle, C, O, R, I. What ends up happening is after these erythrocytes, after these renal cells, after they end up using this glucose that’s been recycled and been displaced, it creates something called lactic acid. This lactic acid travels back to the liver, and it gets converted back into glucose again, so we have a glucose recycling system that’s naturally occurring, so we don’t have to consistently be breaking down protein.
1) Very-low-carbohydrate diets and preservation of muscle mass. (n.d.). Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1373635/#B6
2) Effect of beta-hydroxybutyrate on whole-body leucine kinetics and fractional mixed skeletal muscle protein synthesis in humans. (n.d.). Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC303494/
3) The effects of ketogenic dieting on skeletal muscle and fat mass. (n.d.). Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4271639/
4) Nair KS , et al. (n.d.). Effect of beta-hydroxybutyrate on whole-body leucine kinetics and fractional mixed skeletal muscle protein synthesis in humans. – PubMed – NCBI. Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/3392207
5) Kadowaki M , et al. (n.d.). Acute effect of epinephrine on muscle proteolysis in perfused rat hindquarters. – PubMed – NCBI. Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/8764179