1. Prescription Chondroitin May Help Knee Osteoarthritis - US News and World Report
European drug is not the same as supplement available in U.S., study says

2. Exercise Key Player in Knee Replacement Recovery - US News and World Report
Workouts counter functional decline, could ward off osteoarthritis, study says

3. Osteoarthritis  (Trust Mark: Doctor-Reviewed)
Osteoarthritis (OA) is the most common joint disorder.• Reviewer: Andrew L. Chen, MD, MS, Orthopedic Surgery and Sports Medicine, The Alpine Clinic, Littleton, NH. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

4. Arthritis  (Trust Mark: Doctor-Reviewed)
Arthritis is inflammation of one or more joints, which results in pain, swelling, stiffness, and limited movement. There are over 100 different types of arthritis. See also: Joint pain• Reviewer: Ariel D. Teitel, MD, MBA, Chief, Division of Rheumatology, St. Vincent's Hospital, New York, NY. Review provided by Verimed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.