The condition, which is also known as hypertension, puts extra stress on blood vessels and vital organs.
High blood pressure symptoms include a pounding in your chest, finding blood in your urine, and having an irregular heartbeat.
But, if you have high blood pressure, taking folic acid supplements could help to lower your risk of a stroke, according to the American College of Cardiology.
High blood pressure patients with a low platelet count could benefit from taking cheap folic acid supplements, the scientists claimed.
It would lower their risk of having a first-time stroke, they said. Almost 80 per cent of all strokes are first-time strokes.
Taking folic acid supplements could help to lower the amount of homocysteine, an amino acid, in the blood.
Higher levels of homocysteine have been linked to cardiovascular disease, including stroke.
“If confirmed, these results have enormous public health implications given the high incident rate of stroke in many developing countries, in addition to China,” said lead researcher Dr Yong Huo.
“Based on our findings, we can detect hypertensive adults at particular high risk of stroke and incorporate a folic acid supplement tailored to individual genetic, nutritional and clinical characteristics.
“We are on the right path to figuring out cost-effective primary prevention strategies for stroke in China and beyond.”
Folic acid is an essential B vitamin, that helps the body to make red blood cells.
The research indicates that the vitamin may be a useful complimentary treatment for high blood pressure patients, that also have high homocysteine levels and a low platelet count, said GP Dr Gill Jenkins, an advisor to the Health & Food Supplements Information Service.
All adults in the UK should consider taking a multi-vitamin containing folic acid, Jenkins added.
“People who have high blood pressure or are concerned about their cardiovascular health or risk of stroke should consult their doctor and should not change any medication they are taking without their doctor’s advice,” said the GP.
“However, the findings of this study suggest that taking a B vitamin or multi-vitamin and multi-mineral supplement containing folic acid would be a wise move for all adults in the UK.”
You could also lower your blood pressure by following a healthy, balanced diet, according to the NHS.
Eating a low-fat, high-fibre diet, which includes at least five portions of fruit and vegetables everyday, could slash your risk of the condition.
See a GP or pharmacist to have your blood pressure checked.