I take gelatin (which is hydrolized collagen) every day for joint pain, it helps a little bit. I have also read a little bit about undenatured collagen ( UC-2) and also shark cartilage supplements (which contains collagen as well as other things) . It almost sounds like they work the same as gelatin but I am not sure. Should I just keep taking the gelatin or try the others? I should add I have tried MSM and glucosamine and chondroitin but had to stop as it was giving me acid reflux.( I have GERD and need something gentle on the stomach)