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Inuit Genetics Show Us Why Evolution Does Not Want Us In Constant Ketosis | MWM 2.37

Why were the Inuit never in ketosis, despite their traditional high-fat diet? That question is answered in this lesson. The answer provides a stunning example of human evolution and makes it clear that evolution does not “want” us in a constant state of ketosis. CPT-1a deficiency is a genetic disorder in the ability to make …

Ketoacidosis: The Dark Side of Ketones | MWM 2.36

Ketones have a dark side: ketoacidosis. And it does NOT only happen in diabetes. Ketoacidosis is a serious and life-threatening medical condition wherein ketones accumulate to such high levels that they overwhelm the body’s natural buffering capacity and sink the pH of the blood to dangerous and possibly fatal levels. Ketoacidosis is most often associated …

Ketone Homeostasis During Fasting | MWM 2.35

Ketone homeostasis has two central objectives: 1) keep ketone levels high enough to feed the brain, and 2) keep ketone levels low enough to avoid the serious and life-threatening condition of ketoacidosis. While proportion of circulating ketones taken up by skeletal muscle, heart, and other tissues during fasting is initially high, these tissues limit their …

This is How We Burn Ketones for Energy | MWM 2.33

The production of ketones in the liver frees up coenzyme A (CoA) that would otherwise be captured in the accumulating acetyl CoA, and the conversion of acetoacetate to beta-hydroxybutyrate frees up NAD+ that would otherwise be trapped as NADH as the production of NADH in beta-oxidation exceeds that oxidized in the electron transport chain. This …