No evidence that red tea (Roselle) lowers blood pressure in adults

Hypertension is a serious health problems worldwide. Controlling and lowering blood pressure have a significant benefit to the hypertensive patients because hypertension is a risk factor for stroke, heart disease and cardiovascular disease. A tropical plant called Roselle or red tea has been used as a thirst-quenching drink and for medical purposes. We searched for evidence from clinical studies to evaluate the effectiveness of red tea compared with placebo or no treatment in hypertensive patients. There is a lack of evidence from randomised control trials to demonstrate a benefit of Roselle tea in reducing blood pressure. Rigorous studies need to be done in order to answer this question.