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Food is the body's fuel. The number of calories in food is usually calculated before the food is consumed. But many people do not realize that the actual cooking process to increase the number of calories in food.
A recent research fronted Rachel N. Carmody, Gil S Weintraub and Richard W. Wrangham found that the amount of energy in food is not only dependent on caloric content, but also affect the cooking process.
Scientists from the Human Evolutionary Biology, Harvard University USA have fed two groups of mice with meat or sweet potatoes and then present it in different ways: served with whole or ground, and raw or cooked first to be made into a dish.
The researchers then measured the body weight of rats. They found that the meat and potatoes pounded cause more weight gain than raw food. And the food is cooked first cause weight gain highest.
Research reported by ScientificAmerican.com concluded that the more rats to gain weight if you eat food cooked than raw food. This indicates that the cooking effectively adding energy into the food.
Since hampr two million years ago, humans began to recognize the process of cooking food. The cooking process is fostered the evolution of modern humans to smarter. Physical changes require more energy and cook food with fire seemed to be able to increase energy intake.
In a paper published in the Proceedings of the National Academy of Sciences entitled "Energetic consequences of thermal and nonthermal food processing", the researcher theorizes that cooking food will add extra calories so as to allow the survival of the human body has a larger and more complex brains.
But unfortunately, the process of the evolution of modern humans inherited habits that have left people today many are growing fat.
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