Diogenesister my mother recommended cider vinegar and all I can say is it works as a preventative and if I feel a slight ache in my hips or knees after a long walk it takes away the pain. My mother started to get arthritic pain in her spine in her forties. Her doctor said she would soon be in a wheelchair.
She started reading books about it and changed her diet to a more healthy one with lots of whole foods. She never did use a wheelchair and was riding a bike in her sixties. Her sister on the other hand had her first hip replacement at 47.
Make sure you take it in water to protect your teeth.