Therapeutic Potential and Clinical Prospects of Rheum emodi: A Comprehensive Review

Rheum emodi Wall. ex Meissn., a perennial herb of the Polygonaceae family native to the Himalayan region, has been extensively utilized in traditional medicine systems for over 5000 years. This comprehensive review consolidates contemporary scientific evidence on the plant's phytochemistry, pharmacological activities, and therapeutic potential. The rhizome contains a diverse array of bioactive compounds including anthraquinones (emodin, aloe-emodin, chrysophanol, rhein, physcion), stilbenes (piceatannol, resveratrol, rhaponticin), flavonoids (quercetin, myricetin), and tannins, among others. Pharmacological investigations have demonstrated significant antioxidant, anti-inflammatory, immunomodulatory, antimicrobial, anticancer, hepatoprotective, nephroprotective, antidiabetic, antiulcer, antiviral, and wound healing activities in both in vitro and in vivo models. Hepatoprotection involves mitochondrial membrane stabilization and prevention of chemically-induced liver injury, whereas antidiabetic effects operate through enhanced glucose utilization and modulation of key glycolytic enzymes. Conservation efforts are critically needed as Rheum emodi is classified as an endangered species due to overharvesting and habitat degradation in its endemic Himalayan distribution. This review underscores the necessity for rigorous human clinical studies, standardization of herbal preparations, sustainable cultivation practices, and integrated conservation strategies to realize the therapeutic potential of this invaluable medicinal plant while ensuring its ecological sustainability