Overview: Arthritis is a joint disorder featuring inflammation. The most common types of arthritis are osteoarthritis and rheumatoid arthritis. Osteoarthritis causes cartilage, the hard, slippery tissue that covers the ends of bones where they form a joint, to break down. Rheumatoid arthritis is an autoimmune disorder that first targets the lining of joints - synovium. Depending on the form of arthritis. Causes include injury - leading to osteoarthritis, metabolic abnormalities (such as gout and pseudogout), hereditary factors, the direct and indirect effect of infections. Consult with a qualified professional before taking any natural supplements.