For years, we were informed to eat a low-fat diet to protect us from heart disease.
But a new report says these guidelines - which recommend keeping fat at 30% or less of 10% daily and saturated fat calories or less - were not supported by solid research when decades were emitted ago.
. The authors of the report say even dietary councils "should not have been introduced." U.S. Public health officials made the recommendation in 1977, and 6 years later those of U.K. did the same, in efforts to contain heart attacks and heart disease.Officials recognized that the evidence was not conclusive when the guidelines were issued. The authors of the new report say it is a euphemism.
"Evidence has never been there," says James J. Dinicolantonio, Pharmd. He is a research scientist at the Heart Mid America Institute of St. Luke in the city of Kansas, Mo.The new report echoes worries of other experts, says Steven Nissen, MD, president of cardiovascular medicine at the Cleveland clinic. He says that there must be important change in how doctors advise their patients in the diet. Nissen was not involved in the new report.
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The rehearsals have found that eating a lower fat diet did not reduce the deaths for heart disease or any other cause, he says. In one case, a group that limited its 10% saturated fat had more deaths of heart disease and other causes than those who did not follow the 10% rule, he says.
Here are some other problems that they found:
- Studies included more than 2,400 people, all of them men. There was no difference in mortality rates between men who ate diets with low fat and those who did not. Men in both groups were so prone to dying of heart disease.
- All except one of the studies, it seemed only for men who already had a heart attack, not for those who had not yet obtained heart disease.
- While men who eat less fat had lower cholesterol, they were no less likely to die from heart disease or other causes.
- Five of the six studies used different approaches to reduce fat in people's diets. Only one had participants follow the guidelines that recommend that people attract less than 30% total fat or 10% saturated fat.
At the time the guidelines were issued, the field of what is now known as "evidence-based medicine", was just beginning, says Vasan Ramachandran, MD. He is a professor of medicine at Boston University. He was not involved in the new research, but he is the main investigator of the study of the heart of Framingham, released in 1948 to identify common factors that lead to heart disease.
Public health experts who analyzed the proposed recommendations analyzed the evidence available at the time and made a judgment informed, he says.
While the debate on the best dietary approaches to heart health is in progress while maintaining cholesterol low matters, Ramachandran says.
Large tests show that cholesterol reduction, in turn, reduces the risk of cardiovascular disease, says it. The cutting cholesterol with statin drugs benefited millions, he adds.
Even if the evidence backs up the decades, lack, there is evidence of a link between dietary fat and heart disease, warns Rahul Bahl of the Royal Berkshire NHS Foundation Trust in the UK, but says that saturated fat is not The only heart disease '' villain '' with some data showing carbohydrates should share part of the guilt.
Experts disagree on what to do with fat on the health health diet. "We are genetically designed to eat saturated fat and animal fat," says Dinicolantonio. But he recommends eating integral foods. "An entire food is something you can choose from a plant, a cow's milk, or pull off the floor," he says.
Try to go and stay in an ideal weight if you use a low carbohydrate or low fat diet, Ramachandran says. When you get a healthy weight and exercise regularly, it can help minimize your risk of heart disease, it says - although this is as long as you do not smoke, have diabetes, or uncontrolled high blood pressure or high cholesterol.
Until the more searches are made, Nissen says that people should try to follow the Mediterranean diet. Includes fruits, vegetables, healthy fats such as olive oil, oily fish, whole grains, nuts and legumes along with moderate quantities of red wine.
Nissen says that research shows that people with a high risk of heart disease that ate a Mediterranean diet had fewer heart problems than those who followed a low-fat diet.
The American Heart Association still retreats a low-fat approach. In its current guidelines, AHA recommends maintaining total fat to 25% or 35% of calories daily and saturated fat for less than 7%.
