Natural Alkaline water, not the manufactured stuff. Drink a quart a day. If it is going to work, it will work withing a week. I am 51 and was starting to have joint issues and mild arthritic issues (also hereditary) while playing ice hockey.
I recommend that you buy 7 bottles of water (Trader Joe's sells naturally occurring alkaline drinking water from a well in Carlsbad), drink one every day for the next week and see if it helps. It can't hurt (though I'm no doctor).