Ketosis is a metabolic state in which some of the body’s energy supply comes from ketone bodies in the blood, in contrast to a state of glycolysis in which blood glucose provides energy. Generally, ketosis occurs when the body is metabolizing fat at a high rate and converting fatty acids into ketones.

Step 1) Cutting Off Carbs

When there isn’t a sufficient level of available glucose and glycogen levels are depleted, blood sugar and insulin levels decrease, and the body looks for an alternative source of fuel (fat).

Step 2) Breaking Down Fats

The body breaks down fats for energy. This process is known as beta-oxidation, where there is an increase in acetyl-CoA, which turns into acetoacetate. Acetoacetate then shifts to beta-hydroxybutyrate, the ketone body that floats around in your blood to then provide energy to the body and brain.

Step 3) Using Ketosis

Many people use ketosis for benefits like:

  • Weight loss: When your body is using fat directly as a source of energy, you lose weight more readily because your body taps into your own fat stores for energy instead of the sugar you eat.
  • Improved energy levels: Without surges of glucose, your body has more consistent energy levels because you can use your own body fat for energy (no sugar crashes or food comas).
  • Increased mental focus: Fat is a more consistent source of energy, and preferred by the brain, meaning you don’t have ups and downs in energy and focus.
  • Longevity and disease prevention: Ketosis has been shown to decrease inflammation, Alzheimer, and benefit cancer patients and diabetics.
  • Increased physical performance: Ketosis uses oxygen more efficiently and avoids physical crashes of low blood sugar.

The Keto phases of the body restructuring are the following:

The first

Lasts 12 hours after the last intake of carbohydrate food. At this stage, the body will completely consume the available glucose reserves.

The second

Lasts 24-48 hours. At this time, the body consumes the stores of glycogen, contained in the liver and muscles.

The third

The beginning of metabolism reorganization. The body is looking for an alternative to carbohydrates in fatty acids and proteins, including those contained in muscle mass.


Begins on the 7th day. The body adapts to the lack of carbohydrates and is reconstructed into a ketogenic state, rejecting proteins as an energy source.

In addition to these stages, there is one more – the correct way out of the keto diet. You can not immediately switch to a full-fledged diet rich in carbohydrates. The body needs adaptation again, but this time it will have to be converted to glycolysis.

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