As some have mentioned, lifestyle has a lot to do with it. I never have soda-pop drinks or cola or sugar of any kind - they/it make your system very acidic, which leads to arthritis. Have a warm lemon drink every morning (very alkalizing), lots of fruit and veg, drink lots of water every day. Not too much meat (acidic again). I have taken glucosamine for years - which is a great supplement for joints. I have a wrist that was badly smashed 25yrs ago, and doctors told me I would be in all sorts of strife for the rest of my life. It looks crooked and terrible, but is just as strong and useful as my 'good' wrist. If I hadn't followed such a good lifestyle for all of my life, I would be in deep p?? now. I am 58.
Sutto