Is there any evidence that giving glucosamine and chondroitin supplements to animals with osteoarthritis has any benefit? Is there any risk of harm? This article includes a practical section on "what to say to clients". First published by Veterinary Prescriber in March 2013. We want to present this information in a format that's easy to read and use. Contents buttons take you to the section you want to read and the references are listed next to the text for easy viewing.