The first one is labeled MSM/Glucosamine, and contains 500 mg MSM and 500 mg d-Glucosamine
Sulfate. The second one is labeled TriFlex and contains 1500 mg Glucosamine
HCL, 1200 mg Sodium Chondroitin Sulfate, and 900 mg MSM. I take each pill once a day. I plan to do further tests to try to narrow down the specific substance(s) in these pills that are actually helping me, and I'll post the results.
It's unlikely, of course, that these supplements will help everyone in the same way.