Hibiscus is best known for its ability to support heart health and help respiratory ailments. It is used to regulate blood pressure, lower cholesterol, and lower blood sugar levels. A tasty herb, it makes a wonderful tea that can be enjoyed by the healthy or those needing to heal. It also helps treat sunstroke and hangovers. The two varieties of hibiscus (Hibiscus rosa-sinensis and H. sabdariffa) can be similarly used.