having not ridden for a long long time, I'm starting up again, training for a possible endurance race in 2013. I've always had issues with my knees popping/clicking/cracking (well you name a joint and it does that, I spent the first 18 years destroying my body.. when I walk up stairs I sound like bubble wrap). In the past I have taken glucosamine-chondroitin and it has worked... BUT, its ridiculously expensive (for being ground up sea-shells) and you have to take a LOT of it (3 horse pills, 3 times a day) until it takes affect (then 2 pills, 3 times a day).
I'm kind of hoping for some alternatives/suggestions, otherwise I'm probably going to have to start buying the stuff in bulk LOL