It is known by various other names like Chinese Foxglove, Chinese rehmanniae radix, Chinese RR, Di huang, Dihuang, Gun-Ji-Whang, Japanese rehmanniae radix, Japanese RR, Jio, Juku-jio, Kan-jio, R. glutinosa, Rehmanniae, Rehmannia glutinosa oligosaccharide, Rehmannia Radac, Rehmanniae radix, Rehmanniae root, RR, Rhemannia root, Rehmannia steamed root, RGAE, RGX, ROS, Saeng-Ji-Whang, Sho-jio, Shu Di Huang, Sook-Ji-Whang, To-byun. It is a plant and the root and above ground parts are used to prepare the medicine. Some chemicals in rehmannia seem to affect the immune system and might have antiinflammatory effects. Some chemiclas in rehmannia also seem to decrease blood sugar levels. It functions as a blood tonic, antihypertensive, diuretic, nutritive, demulcent, antiseptic, cardiac, febrifuge, haemostatic, hypoglycemic, antibacterial, antiseptic, alterative, hypocholesterolemic, hypotensive, laxative, refrigerant. Constituents include Alanine, Arginine, Aspartic-acid, Aucubin, Beta-sitosterol, Calcium, Catalpol, Copper, D-fructose, D-galactose, D-glucose, Gaba, Glucosamine, Glutamic- acid, Glycine, Histidine, Iron, Isoleucine, Leucine, Lysine, Magnesium, Manganese, Manninotriose, Mannitol, Melittoside, Methionine, Phenylalanine, Phosphoric-acid, Potassium, Proline, Raffinose, Rehmaglutins, Rehmanniosides, Serine, Stachyose, Sucrose, Threonine, Tyrosine, Valine, Verbascose, Zinc, Vitamins A, B, C, D, amino acids, cerebroside, dammelittoside, Used in the treatment of diabetes, anemia, fever, osteoporosis, and allergies. However there is insufficient scientific evidence to support the same.