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How Does Keto Work?
A ketogenic diet, or keto for short, is any diet that puts your body in a state of nutritional ketosis, and
your body is burning fat (either body fat or fat that you eat) for fuel.
If you eat a high-carb diet (and most of us do), your body burns glucose for fuel. There are problems
with glucose. The body can store about 2000 Calories of glucose energy at any one time in the form of
glycogen. Once that is depleted, you can lose energy (sometimes called “bonking”) and you need sugar
STAT! Excess glucose raises insulin. Insulin drives glucose into skeletal cells for storage as glycogen
and/or burning. It also drives glucose into the liver for storage as glucose and/or burning, and/or
conversion into fat. Glucose is also shipped out in LDL (or stored in the liver as foie gras). Insulin also
drives glucose into fat cells to be converted into fat and stored. Fructose, one half of table sugar – and
the sugar in all fruit, goes directly to the liver to be converted to fat. That’s right. All fruit sugar, ½ of all
table sugar, and high fructose corn syrup are NOT burned as energy. It’s stored as fat.
Excess glucose in the blood can cause major damage, as we’ve already discussed, leading to type 2
diabetes – a disease the medical establishment tells you is progressive, only gets worse, and cannot be
reversed.
If you remove carbohydrates and instead eat moderate protein and higher levels of fat, insulin levels
drop because there is much less glucose to operate on. When insulin is low, your liver can burn fat for
fuel. That’s just the way it is. Your body can’t burn stored fat unless insulin is low.
The byproduct of burning fat is ketones. Ketones are essentially fatty acids that most cells in your body
(including your brain, heart, and other organs) can use directly for fuel. In fact, we are all born in
nutritional ketosis. For 180,000 years, Homo Sapiens has been in nutritional ketosis most of the time,
living on animal protein and fat – with occasional plants, nuts, and fruits.
Just because your body is in ketosis doesn’t mean that it’s particularly good at using fat for fuel. It takes
3 to 8 weeks to become fully fat-adapted. Your body forgets how to deal with glucose effectively and
instead gets very efficient at dealing with fat, and the ketones that come from fat burning.
Once you are fully fat adapted, you’ll find you have an unending source of energy. You could run a
marathon and not run out of juice. Your body fat is your new source of energy, and it doesn’t need to be
replenished with food. Many advanced athletes are performing amazing feats of endurance while
fasted! As long as the body can burn body fat, it’s smooth sailing.
You can expect your cravings and hunger to disappear. As long as you stay away from carbs you won’t
want them. The more fat-adapted you get, the less you’ll want to eat “carbage.” You can expect to
return to a healthy body weight in a relatively short period of time.
WARNING: You must commit to the ketogenic diet in order for it to work. If you sneak bread or other
carbs you could ruin yourself. Eating more fat with even moderate amounts of carbs – what some would
consider low – isn’t going to work. Throw out all the tempting carbage. Don’t worry, though. You will be
able to eat amazingly good food. You must be committed or it won’t work for you. It takes a leap of faith
to get started. But once you get a taste of ketones, you won’t want to stop.
The definitive book on the Ketogenic Diet is “The Art and Science of Low Carb Living” by Volek/Phinney.
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