According to recent studies, all types of diets to produce the ideal weight of origin limit the number of calories that enter the body.
Previously, we often hear, the key to losing weight is a low-carbohydrate diets. Even the diet is said to be more effective than low-fat diet.
But a study conducted in the United States over the past two years found that the most important is how much calories are in and out.
"The secret is not on a diet low in fat or carbohydrates," says Dr. Elizabeth Nabel, head researcher from the National Heart, Lung and Blood Institute. "But, by restricting calorie intake and burn with exercise."
Results were published Thursday, February 26, 2009, in New England Journal of Medicine, by Harvard School of Public Health and the Pennington Biomedical Research Center in Louisiana, USA.
The study was conducted on 811 adults who are overweight. Each respondent has a fat content, protein and carbohydrate are different. The respondents were required to reduce 750 calories per day and exercising for 90 minutes each week.
During the program, the respondents still consume dairy products and meat. They also must always be met with a nutritionist to monitor the development of diet. The result, on average the respondents have reduced 6.5 kg in six months. Within two years they to get the ideal body weight.
But not all respondents to obtain results. Respondents who more often come to a nutritionist to get better results.
According to one researcher, Dr. Frank Sacks, routinely meet with a nutritionist to make their diets monitored on an ongoing basis and calorie content in food is limited.
"They should be more focus on the calorie content of food consumed," says Sacks.
But some other researchers doubt the respondents still to maintain their weight if it is no longer in the monitoring of nutrition experts.
"Although the respondents have high motivation, when they separated from a nutritionist will be difficult to maintain their weight," says Martijn Katan from Vrije Universiteit, Amsterdam, The Netherlands.
