A new study has found that hibiscus tea may significantly reduce high blood pressure, but only when consumed at a specific and consistent time of day.
Hibiscus tea is a fragrant herbal infusion made from the dried calyces of tropical hibiscus flowers.
The study, published in the Journal of Advanced Pharmaceutical Technology and Research, aimed to assess the antihypertensive effect of hibiscus tea in cases of stage one hypertension.
Stage one hypertension refers to the early phase of high blood pressure, where readings indicate a heightened risk of developing more severe hypertension in the future. Patients included in the trial had been diagnosed with stage one hypertension by a cardiologist and had provided prior informed consent to participate in the clinical trial.
Participants were divided into two groups. Both groups received identical lifestyle and dietary advice to help manage blood pressure. In addition, the intervention group consumed two cups of plain hibiscus tea each morning for one month.
Blood pressure readings for both groups were recorded at the beginning of the study and again at the end. The results were then analysed.
A total of 46 patients participated in the trial. There was no significant difference in age or body mass index (BMI) between the groups. BMI is a measurement that uses height and weight to determine whether a person has a healthy weight.
Researchers observed a substantial reduction in systolic blood pressure in both groups. However, the average reduction in both systolic and diastolic pressure was significantly greater in the group that consumed hibiscus tea.
The researchers concluded: ‘The use of hibiscus twice daily may be effective in managing blood pressure in cases of stage one hypertension, in conjunction with lifestyle and dietary modifications.’
– General advice for managing high blood pressure –
Simple lifestyle changes may help reduce high blood pressure, although some individuals may require medication as well.
According to the NHS, daily salt intake should be limited to under 6 grams – approximately one teaspoon.
A low-fat, balanced diet including plenty of fresh fruit and vegetables can also support healthy blood pressure levels.
