Swedish physiologist Fredrik Nustrem carried out an experiment couple of years ago. According to the results different people react the changes of the nutrition order differently and the increase of the foods calorie content doesn’t always mean the increase of the body weight.

18 volunteers decreased their physical activity within several weeks and ate lots of high-calorie foods like hamburgers, French fires, ice-cream, sweet milk cocktails, fizzy water, pizza and etc. The daily food calorie content reached 5000-6000 kilocalorie. At the same time the participants of the experiment experienced almost all known medical tests. The synthesis of almost 30 thousands of proteins was evaluated. Various enzymes were analyzed. The part of the fat and muscles in the body as well as changes of the bones density was evaluated with new X-ray methods. It is known that nutrition affects mentality the participants of the experiment passed through various psychological tests. The result was quite different reaction of the people to overeating. Not all of them experienced considerable increase of the weight caused by the overeating. Probably the matter is individual peculiarities of the metabolism and energy exchange.

For instance one of the participants added 4,6 kilograms within one month but the half of this mass related to the muscles mass. He experienced decrease of the blood cholesterol level at the same time. However now walking became more difficult for him. Furthermore even slight physical exercises cause excessive sweating. Another participant had to leave the experiment as he added over 15% of his initial weight within 2 weeks of the experiment and this is quite dangerous for the health. Neither participant of the experiment experienced any troubles with the liver what is considered to be quite corresponding when eating too much and too fatty foods. Though several participants got their blood liver enzymes level increased. This fact shows the increased work the liver had to perform.

Some participants have solved the problem of the excessive calories quite successfully. But fats and carbohydrates they have overused were burned too actively thus causing excessive heat. These people felt hot throughout the experiment and got increased sweating. It is quite interesting that participants were depressed mostly by decreased physical activity and not overeating. Though only few of them engaged sports regularly. Many participants felt lack of the walking or bicycle riding. Furthermore many complained about the lack of the hunger. One begin to appreciate it when lacks it constantly. Psychological tests revealed depression in several participants. This is quite normal in case one has obesity. However the other got considerably better mood condition.

Moreover we have to mention cholesterol separately. It is known for several years already that it is impossible to decrease the blood cholesterol level considerably without any alterations of the diet and refraining from fatty foods. The Nustrem experiment proved this fact once again. Many participants got their blood cholesterol and other fatty substances level increased slightly. The others experienced decreased low density cholesterol level and increased high density cholesterol level. All this once again proves the fact that diets as well as other ways of loosing the weight should always be individually adjusted according to the individual body peculiarities and metabolism.