Efficacy of Omija (Schisandra Chinensis) Extract in Subjects With Knee Osteoarthritis

Inclusion Criteria: * Males and females 30-70 years old * mild to Moderate KO(Knee Osteoarthritis) as indicated by WOMAC(Western Ontario and McMaster University Osteoarthritis Index) score ≥ 38 * Able to walk * Subject agrees not to start any new therapies for OA during the course of the study * Able to give informed consent Exclusion Criteria: * History of underlying inflammatory arthropathy; septic arthritis; inflammatory joint disease; gout; pseudogout; Paget's disease; joint fracture; acromegaly; fibromyalgia; Wilson's disease; ochronosis; haemochromatosis; heritable arthritic disorder or collagen gene mutations or rheumatoid arthritis * Expectation of surgery in the next 4 months * Recent injury in the area affected by OA of the knee, i.e. meniscal tear (past 4 months) * Cartilage reconstruction procedure in the target knee * Intra-articular corticosteroid injections in the target knee within the last 3 months * Viscous injections in the target knee within the last 6 months * Abnormal liver or kidney function tests (ALT or AST \> 2 times the upper limit of normal; elevated creatinine, males\>125 umol/L, females\>110 umol/L)