Glucomannan is a dietary fiber derived from the root of the elephant yam, also known as the konjac plant, which is native to Asia. Traditionally, it has been used in Chinese medicine to treat intestinal disorders, prevent tumors, and soothe burns. It also has applications as a remedy for coughs, asthma, hernias, breast pain, and various blood and skin conditions. Modern research supports its use as a supplement for weight loss, cholesterol management, blood sugar control, and constipation relief.