“Ketones are formed when the body starts using fat as its primary source of energy instead of the usual carbohydrates; the average person on a ketogenic diet, cutting carbohydrates down to 20 grams a day (just 80 calories’ worth), will deplete their body’s stored carbohydrates and start pumping out ketones as it switches to a fat burning mode within a day or two.
Forming ketones is the goal of the ketogenic diet — sometimes known as the “fat adaptive” diet — because they kick-start a different kind of metabolism that relies on burning fat for energy, which theoretically means it’ll be easier for humans to get rid of whatever weight they wish they could shed. The Ketogenic diet isn’t so different from Atkins, low in carbs and high in fat…”
“The ketogenic diet remains very controversial because scientists believe, as humans, we originated from a macronutrient diet, where our bodies became accustomed to eating the three different nutrients — carbohydrates, fat, and protein,” Arciero says. “To completely eliminate, or nearly eliminate, one of these macronutrients — carbohydrates in this case — we still don’t have good evidence that this is the best thing to do.”
Woo, however, sees the growing wealth of scientific data on ketogenesis as confirmation of what biohackers already suspect: That ketosis, often kickstarted by fasting, is the long-awaited key to a healthy life and longevity. Yes, more human studies need to happen, but animal models are promising.”