I've had osteoarthritis in one knee for quite a few years now. At one point,i was in extreme pain to bend down on one knee. After a few months of a glucosamine/chondroitin/msm combination i am feeling 90% better. This combination helps build the synovial fluid in your joints. Of all the types i've tried,, the liquid version worked the best. Costco has a good one. I forget the name,, but it comes in a red bottle, and every two tablespoons contains about, 2000mg glucosamine, 1400mg chon droitin and 400mg of msm.
I'd stay away from tablets,,there are some crappy one's out there and they might not break down in your body,and basically you crap them out.
Your second bet would be ones in a gelatin capsule. Webber is a company that isn't bad, it can be had at Costco as well. Good luck!