My knees were pretty bad 20 years ago and I was on a cane wondering about wheel chairs when I got turned on to Glucosamine-and-Chondroitin. That fixed me right up. Since then I have graduated to Curcumin and Ginger which I get in bulk and put on my food. I have no signs of arthritis now except in one thumb which doesn’t seem amenable to anything.
Have you tried boron?