Originally Posted by
deep_sky
I think you are going to have a tough time finding a vegan source of chondroitin, since it is found the cartilage of animals. The internet suggests that algae might also contain it, but didn't indicate if any real chondroitin products have been made from it.
It seems that you will either have to compromise your principles to take chondroitin, or not take it, currently.
The same used to be true of glucosamine supplements, they were all from shellfish. Eventually there will be non-animal sources for chondroitin, if there aren't already. Studies have used it, so it must exist. If not commercially available yet, it will be. I'll wait.