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Unsaturated Fats and Nitrite-Rich Vegetables Reduce Hypertension Risk

by Kathy Jones on May 20, 2014 at 8:08 PM
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 Unsaturated Fats and Nitrite-Rich Vegetables Reduce Hypertension Risk

Researchers at King's College London have found that combining unsaturated fats with a diet involving with nitrite-rich vegetables, such as olive oil and lettuce can provide protection against hypertension, a new study published in the journal PNAS reveals.

The Mediterranean diet typically includes unsaturated fats found in olive oil, nuts and avocados, along with vegetables like spinach, celery and carrots that are rich in nitrites and nitrates.

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When these two food groups are combined, the reaction of unsaturated fatty acids with nitrogen compounds in the vegetables results in the formation of nitro fatty acids.

The study, supported by the British Heart Foundation, used mice to investigate the process by which these nitro fatty acids lower blood pressure, looking at whether they inhibited an enzyme known as soluble Epoxide Hydrolase which regulates blood pressure.
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Mice genetically engineered to be resistant to this inhibitory process were found to maintain their high blood pressure despite being fed the type of nitro fatty acids that normally form when a Mediterranean diet is consumed. However, nitro fatty acids were found to lower the blood pressure of normal mice following the same diets.

Thus, the study concludes that the protective effect of the Mediterranean diet, combining unsaturated fats and vegetables abundant in nitrite and nitrate, comes at least in part from the nitro fatty acids generated which inhibit soluble Epoxide Hydrolase to lower blood pressure.

Professor Philip Eaton, Professor of Cardiovascular Biochemistry at King's College London, said: "The findings of our study help to explain why previous research has shown that a Mediterranean diet supplemented with extra-virgin olive oil or nuts can reduce the incidence of cardiovascular problems like stroke, heart failure and heart attacks."



Source: Eurekalert
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