The brain is, despite its small size, an energy demanding organs. One fifth of the energy of the body is to supply the brain. And it requires a continuous supply, since no energy can be stored in the brain. Usually, brain energy from glucose, a sugar.
- Though it is not necessary to eat sugar. The brain needs energy which is carbon skeleton, there are groups including carbon atoms. There you can get from sugar, but also from carbohydrates, amino acids or fatty, says brain researcher Martin Ingvar, professor of clinical neuroscience particularly interested in the reward system of the brain.

With low carbohydrate diet stress system calms down. In a strict low carbohydrate diet ports body in ketosis. This means that the body and the brain begins to use ketones for energy instead of glucose.

• Low carbohydrate diets work great for the brain. The whole argument that we need carbohydrates is wrong, it only takes a half a glass of milk and some vegetables for you to manage you. To sugar the brain would be as important as vitamins are completely wrong.

How it works:
First The brain is an energy thief
The brain is energy consuming. Although it is only about 2 percent of total body weight, it consumes yet 20 percent of the energy.

2 fat becomes fuel for the body
You typically use brain glucose as energy. It can be obtained from the carbohydrates you eat, they break down into glucose. When you eat a strict low-carb diet, that carb, starts instead your brain and body use fat for energy. This condition is known to be in ketosis.

3 Conversion to ketones
For fat to be used as energy in the brain, it must be converted. First the fat is broken down to fatty acids nor its able to cross the blood-brain barrier. Therefore, the fatty acids are converted to ketones (ketone bodies) in the liver. The ketones are then transported with the blood through the arteries to the brain.

4 Transported in other way
Glucose is composed of six carbon atoms, ketones consists of three carbon atoms. The difference between glucose and ketones is that ketones are transported into the brain in a different way than glucose. Otherwise incinerated in the same manner.