Hibiscus is rich in powerful antioxidants and may therefore help prevent damage and disease caused by the buildup of free radicals. Several studies have found that hibiscus tea may lower both systolic and diastolic blood pressure. Over time, high blood pressure can place extra strain on the heart and cause it to weaken. High blood pressure is also associated with an increased risk of heart disease. In addition to lowering blood pressure, some studies have found that hibiscus tea may help improve blood fat levels, which can be another risk factor for heart disease . Several studies suggest that hibiscus tea may be associated with weight loss and could help protect against obesity. Interestingly, studies have shown that hibiscus may promote liver health and help keep your liver working efficiently.