The processed carbohydrates stimulate the region of the brain taking food addiction.
It 'as reported in a new study by scientists from Boston who have studied the behavior of some individuals who habitually consume complex carbohydrates. The research results were published on 'American Journal of Clinical Nutrition.
Researchers Hospital in Boston have scanned the brains of men who drank smoothies containing highly processed carbohydrates, noting an increase in blood sugar followed by a sudden collapse and sudden, four hours later.
The fall in blood sugar stimulated region of the brain taking dependence.
"We have shown for the first time that refined carbohydrates can trigger food cravings many hours later consumption and not through psychological mechanisms but through biological effects on the brain," said study author, Dr David Ludwig.
The study analyzed the reactions on male subjects and not on those of women, so many consider this as a real limit.
Some research has also highlighted the fact that foods with high glycemic index, like white bread, donuts white, white rice, potatoes and sugars trigger concentrated in overweight and obese than an uncontrollable desire to eat too much.
As just one example, currently about 62% of the Canadian adult population is overweight and the proportion is set to increase exponentially.
The director of the New Balance Foundation Obesity Prevention Center Children's Hospital Boston, David Ludwig asks whether the strong desire to eat this in overweight is linked to the consumption of refined carbohydrates that go to stimulate the area of the brain taking dependence .
"Overweight people, by definition, they eat too much, consume too many calories and despite the efforts, few are able to stick to a reduced-calorie diet in the long term," said Ludwig, "these people tend to regain the weight who lost after six months or a year. "
The team that performed the study achieved through MRI brain scans on 12 overweight men aged 18 and 35 who consumed two meals containing the same amount of calories and carbohydrates.
The only difference between the two meals was that one of them contained a fast-digesting carbohydrates, high glycemic index, the other, instead, slowly digested carbohydrate.
"People need food to survive," said Ludwig, "but in recent decades, our food supply is based on highly processed products that increase over the glycemic index."
June 27, 2013