Too bad. Although, when reading the article, it sounds like both the initial claims of effectiveness as well as the current claims of ineffectiveness are to be taken with a grain of salt. Current claims say earlier studies were poorly designed. However, other researchers point out that current claims are based on analysis of only 3 of 19 studies.
Either way, experts seem to agree that chondroitin does no harm, and providers are not telling patients to change their chondroitin taking routines.