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Ketosis In An Evolutionary Context

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Your Brain On Ketones

Ketogenic diets have been prescribed for seizures for a long time. The actual research diets used in the past were pretty dismal and seemed to involve drinking a lot of cream and eating a lot of mayonnaise. At Johns Hopkins, pediatric patients were admitted to the hospital for a 48 hour fast and then given eggnog (minus the rum and sugar, I'm guessing) until ketosis was achieved (usually took about 4 days). In addition, ketogenic diets were calorie restricted to just 75-90% of what would be considered a child's usual calorie intake, and often they were fluid-restricted too (1)! If we're talking soybean oil mayonnaise, you could see how someone could get into trouble with mineral deficiencies and liver problems pretty quickly. To understand "dismal," some of the latest research showed that a "modified Atkins protocol" was just as good as the classic ketogenic diet, and so much more liberating, as the patients were allowed up to 10 grams of carbohydrates daily, and they didn't begin with the fast, and they weren't calorie restricted (2)(3). While the classic ketogenic diet was 4:1:1 fat to carbs to protein. If you use MCT oil for 50% of your calories (have to add it in slowly though Continue reading >>

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  1. Naonin

    http://caloriesproper.com/?p=5078
    Humans are unique in their remarkable ability to enter ketosis. They’re also situated near the top of the food chain. Coincidence?
    During starvation, humans rapidly enter ketosis; they do this better than king penguins, and bears don’t do it at all.
    Starvation ketosis
    Humans maintain a high level of functionality during starvation. We can still hunt & plan; some would even argue it’s a more finely tuned state, cognitively. And that’s important, because if we became progressively weaker and slower, chances of acquiring food would rapidly decline.
    Perhaps this is why fasting bears just sleep most of the time: no ketones = no bueno..?
    Observation: chronic ketosis is relatively rare in nature. Angelo Coppola interpreted that to mean animals may have evolved a protective mechanism against ketosis (if you were following along, please let me know if this is a misrepresentation).
    More in link.

  2. Naonin

    Fasting baby elephant seals get ketotic, because their babies
    :|

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