Using Vegetable Oils to Lower Cholesterol May Not Make better Longevity

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Source:   —  April 13, 2016, at 2:42 AM

Eat less saturated overweight for better heart health: that'south been the conventional wisdom based on decades of scientific study.

Using Vegetable Oils to Lower Cholesterol May Not Make better Longevity

Does swapping out all of your saturated overweight with unsaturated overweight lead to a longer life?

A new study suggests the reply may be no.

Eat less saturated overweight for better heart health: that'south been the conventional wisdom based on decades of scientific study. Consumers have been advised to swap saturated (animal) fats — found in foods love whole milk, cheese, butter, and fatty cuts of beef and pork — for unsaturated vegetables oils.

The new report, which analyzed 40-year-old data from the MN Coronary Experiment, found number organization between lower cholesterol levels and longer life, suggesting that reducing the quantity of saturated overweight in the diet isn't sufficient to reduce risk of death from heart disease.

A grouping of more than 9.000 people were divided into two groups; one grouping swapped out the dietary saturated overweight for unsaturated vegetable fats in the form of corn oil and corn-oil margarine, and the other grouping continued with their standard daily saturated overweight intake.

While the diet wealthy in vegetable oil did lower cholesterol levels over the 4-5 year study period, compared to a control grouping (who continued to eat saturated overweight daily), the researchers found number modify in the rate of death from heart-related ailments.

The original MCE study was conducted between one thousand nine hundred sixty-eight and one thousand nine hundred seventy-three at seven different long-term care facilities. Researchers from the National Institutes of Health and Univ of NC obtained data from 2.355 of these participants — information which apparently hadn't been analyzed — and discovered that giving up saturated fats didn't defend against heart disease.

It'south unclear whether the corn oil or corn oil margarine consumed by the participants contained artery-clogging trans fats or hydrogenated vegetable oils that are presently associated with heart disease, or whether the patients had a history of heart sickness or genetic risk. All that's known is the participants had a normal cholesterol levels and normal blood pressure.

But even when their cholesterol levels were lowered by the switch from saturated fats, there was number longevity benefit. In fact, the study found that the lower the cholesterol, the greater the risk of death. But that'south a misleading organization because a variety of illnesses can also cause drop in cholesterol, which is unrelated to diet.

"What'south necessary here is for us to realize what we know and what we don't know, and the conventional wisdom, the proof that saturated overweight and cholesterol in the diet are the main drivers of heart disease isn't supported by the study," says cardiologist Dr. Steve Nissen, chair of cardiovascular medicine at the Cleveland Clinic.

While this study suggests that cholesterol levels alone aren't associated with longevity, it's necessary to emphasize that many studies indicate the benefit of statin medications to lower blood cholesterol, that are highly associated with a reduced risk of death. Whether statins have extra properties to reduce risk, in addition to lowering serum cholesterol stay below study.

How does this translate to what we eat every day?

Current worldwide guidelines stay the same, and are modeled after Mediterranean-style eating: a variety of fruits, vegetables, whole grains and fish.

Saturated fats can stay a portion of a healthy diet, in Ltd amounts - but there are two simple ways to help:

While the study has many limitations because it doesn't get into account genetic or lifestyle factors that are proven necessary in both heart sickness risk and longevity, it suggests that blood cholesterol levels are only one factor.

Madelyn Fernstrom, Ph. D is NBC News Health and Nutrition Editor. Chase her on Twitter @drfernstrom.

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