What is Gymnema? Gymnema sylvestre is an Ayurvedic herb commonly known as Gurmarbooti, Gurmar and “destroyer of sugar”. Gymnema is a woody climbing plant with leaves that possess herbal properties that can be useful to help in weight loss. What are the benefits of Gymnema? Gymnema was traditionally used for: diabetes stomach ailments constipation water retention liver disease Gymnema can abolish the taste of sweetness. When the leaves of the Gymnema plant are chewed, they interfere with the taste of sweetness.