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Quercetin May Help Lower Blood Pressure

Hypertension is characterized by abnormally high blood pressure. A recent study has found that onion skin-derived food supplements of the flavanol quercetin may help lower blood pressure in people with hypertension.

Participants in the study included 68 overweight or obese people with pre-hypertension or stage 1 hypertension. They were given either a quercetin-rich onion skin extract supplement or a placebo three times a day for six weeks. The supplements contained a total of 162 mg of quercetin, broken into three 54 mg capsules.

People with high quercetin intake in their normal diets were excluded from the study.

At the conclusion of the study, the researchers found that the participants who did not have high blood pressure at the onset of the study did not show significant changes in blood pressure. However, those with high blood pressure had an average drop of 3.6 mmHg in systolic blood pressure.

Researchers from the University of Bonn in Germany conducted the study. It was published online ahead of print on September 2, 2015, in the British Journal of Nutrition.

Quercetin is a flavanol that has also been linked to helping with asthma, allergies, and hives as well as improving cholesterol levels, reducing blood pressure, reducing the risk of heart disease, and even reducing the risk of cancer. The quercetin in this study came from onion skins, but this essential nutrient can also be found in capers, dark red fruits such as cranberries, raw green chili peppers, red leaf lettuce, raw kale, and asparagus.

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