I've been using glucosamine sulfate for maybe three years now, and will continue to. I had been having some hip problems with arthritis, but that seems to be pretty much a thing of the past. The brand I use does NOT have chondroitin, and the company advises against chondroitin-- I forget why, maybe just that they say the research doesn't show an advantage. It's several years since I read the writeup. I do recall that they state they have double-blind testing in the background on their product. I do also take MSM which works with the GS.

Dave Oesterreich