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Ketosis Metabolism

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Ketosis

There is a lot of confusion about the term ketosis among medical professionals as well as laypeople. It is important to understand when and why nutritional ketosis occurs, and why it should not be confused with the metabolic disorder we call ketoacidosis. Ketosis is a metabolic state where the liver produces small organic molecules called ketone bodies. Most cells in the body can use ketone bodies as a source of energy. When there is a limited supply of external energy sources, such as during prolonged fasting or carbohydrate restriction, ketone bodies can provide energy for most organs. In this situation, ketosis can be regarded as a reasonable, adaptive physiologic response that is essential for life, enabling us to survive periods of famine. Nutritional ketosis should not be confused with ketoacidosis, a metabolic condition where the blood becomes acidic as a result of the accumulation of ketone bodies. Ketoacidosis can have serious consequences and may need urgent medical treatment. The most common forms are diabetic ketoacidosis and alcoholic ketoacidosis. What Is Ketosis? The human body can be regarded as a biologic machine. Machines need energy to operate. Some use gasoline, Continue reading >>

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  1. austinpsycho

    So I have discovered, and devoured quite a few episodes of 2 keto dudes. There's some really great information about the metabolic rate and how it relates to longer fasts. Maybe I just haven't gotten far enough in the show yet, but I am really interested in how the metabolism responds to both intermittent fasting, and more generally, how the presumably lower calorie count maintained on keto affects said rate.
    I've been on keto for about a month now, and I worry that as I eat less, my body will become more efficient with those calories, and I'll need to eat even less and so on. I very much appreciate any information you guys can provide, or point me at. Thanks so much.

  2. devhammer

    austinpsycho:


    I am really interested in how the metabolism responds to both intermittent fasting, and more generally, how the presumably lower calorie count maintained on keto affects said rate.
    This would be an incorrect assumption, at least to the extent that the point of keto and/or IF is not to reduce calories. For those who have a good deal of body fat from which to draw energy, once they've gotten insulin sufficiently low to make that energy source available, reduced foot intake may be an effect of keto. Hopefully, that distinction is clear. The point is not to maintain a "lower calorie count". The point is to eat fewer foods (i.e. carbs) that stimulate insulin production, and more foods that don't (i.e. fat) while eating sufficient protein to maintain lean body mass.
    austinpsycho:


    I worry that as I eat less, my body will become more efficient with those calories, and I'll need to eat even less and so on.
    If you restrict calories, your body doesn't "become more efficient" per se. It slows your metabolism to compensate. So you may feel cold or sluggish, or other effects. But if you eat a well-formulated ketogenic diet, how much you eat is determined by whether or not you are sated.
    You'll see this formula repeated often, because it is easy to remember, easy for most folks to follow, and it usually works:
    No more than 20g of carbs per day (important, not a percentage, but a hard limit of 20g, which will allow most folks to get into ketosis)
    Sufficient protein to maintain lean body mass (approx. 0.5-1g per kg of lean body mass)
    Fat to sateity.

    Don't worry about calories. And if you've only been at this for a month, don't worry about fasting yet. Keep it simple, and KCKO (Keep Calm and Keto On).

  3. BGdiving

    devhammer:


    Don't worry about calories. And if you've only been at this for a month, don't worry about fasting yet. Keep it simple, and KCKO (Keep Calm and Keto On).

    It almost seems like most people doing Keto need to fast in order to continue loosing weight. When I was doing "my version" of the Atkins induction diet I definitely felt like I ate more and more often was never hungry and could loose weight as long as I was consistent. I hate food journaling, but for the 8 or 10 days that I did journal I was eating at least a couple of large meals a day and some low carb snacking. Several of those days I had a late night 20 oz rib eye and logged a little over 5000 calories per day and was loosing weight rapidly (didn't loose on 6000+ cal days) and this is after I had already lost over 100 pounds. BUT now after I started some intermittent fasting and backing down on the protein consumption I feel as if my metabolism has slowed way down and I have to be much more restrictive in how much I eat if I want to loose weight or even hold even. I do Not feel lethargic and I definitely am not cold just seems I have messed up my metabolism like @austinpsycho is concerned about, definitely cheaper I don't snack during the day and I skip meals but kind of inconvenient and discouraging having to be more restrictive if I don't want to gain weight say nothing of trying to loose those extra pounds I still need to get rid of.

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