I have suffered with severe joint pain for around three years. My doctor recently did a bone density scan and that was ok. I upped my calcium intake anyway and within two days of doing so my pain had disappeared. I now take 2000 mg calcium daily and have been doing so for the past month and am still pain free. Don't understand why but it's wonderful to feel like moving around again.
I've seen posts from other people who have joint pain so maybe this is worth a try.