Ketone bodies are organic compounds that are produced by the liver for the purpose of providing energy to the body. These molecules make it possible for our cells to easily oxidize fats, which is a necessary process in the event our dietary intake of carbohydrates is low. In short, ketone bodies help keep our bodies healthy in situations where carbohydrates are scarce.
How Ketones Work
When you're eating a standard diet, your body uses glucose as its primary source of fuel. Glucose comes from carbohydrates in your food and can be used by every cell in your body, but it's not particularly efficient at fueling the brain. As a result, you might feel lethargic and mentally foggy when you work out hard or fasted.
One way to get around this issue is to use ketones instead of glucose as your brain's primary source of fuel. This is why people who follow a ketogenic diet (more on that later) tend to feel mentally sharp even after a workout—they're getting all of their energy from ketones instead of glucose.
Another benefit: People who have been on a ketogenic diet for a long time often report feeling less anxious than they did before they started it. This could be because ketones provide an alternative energy
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