Hibiscus Sabdariffa Extract Powder has been used to ease indigestion, relieve colds and respiratory trouble, and as an aid to circulation. Hibiscus is commonly made as a tea to ease stomach trouble. Hibiscus is also a natural source of Vitamin C. Hibiscus Roselle Extract Powder also known as Red Tea, China Rose, Red Sorrell, Roselle, Jamaica Tea,and Sudanese Tea, is not just another pretty flower. Hibiscus grows in tropical areas throughout the world, and has been used not just as an ornament, but also medicinally for centuries. The part of this plant used medicinally is the flower.