A glass of beetroot juice daily may help reduce your blood pressure, according to a new study led by an Indian-origin researcher.
The study, published in the American Heart Association journal Hypertension found that people with high blood pressure who drank about 227 gram of beetroot juice experienced a decrease in blood pressure of about 10 mm Hg.
But the preliminary findings don't yet suggest that supplementing your diet with beetroot juice benefits your health, researchers said.
"Our hope is that increasing one's intake of vegetables with a high dietary nitrate content, such as green leafy vegetables or beetroot, might be a lifestyle approach that one could easily employ to improve cardiovascular health," said Amrita Ahluwalia, lead author of the study and a professor of vascular pharmacology at The Barts and The London Medical School.
The beetroot juice contained about 0.2g of dietary nitrate, levels one might find in a large bowl of lettuce or perhaps two beetroots.
In the body the nitrate is converted to a chemical called nitrite and then to nitric oxide in the blood. Nitric oxide is a gas that widens blood vessels and aids blood flow.
"We were surprised by how little nitrate was needed to see such a large effect," Ahluwalia said.
"This study shows that compared to individuals with healthy blood pressure much less nitrate is needed to produce the kinds of decreases in blood pressure that might provide clinical benefits in people who need to lower their blood pressure.
"However, we are still uncertain as to whether this effect is maintained in the long term," she said in a statement.
The study involved eight women and seven men who had a systolic blood pressure between 140 to 159 millimetres of mercury (mm Hg), did not have other medical complications and were not taking blood pressure medication.
The study participants drank 250 ml of beetroot juice or water containing a low amount of nitrate, and had their blood pressure monitored over the next 24 hours.
Compared with the placebo group, participants drinking beetroot juice had reduced systolic and diastolic blood pressure - even after nitrite circulating in the blood had returned to their previous levels prior to drinking beetroot.
The effect was most pronounced three to six hours after drinking the juice but still present even 24 hours later.
