wsup Gymtime?
I've never taken joint support supplements. I'm 24, don't know if that has much to do w/ it. I train w/ people older than me and i can tell you what they take.
Chrondriton (sp) and i heard MSM w/ Glucosamine is the best. They tell me to take it to prevent future problems but i don't want to shelve the cash. Also i heard in order for glucosamine to work you need to take it religiously for over a month, versus the MSM starts to work much sooner. Chrondriton heard it's not all that great.
I have sometimes a problem w/ my left shoulder. When this happens i take time off lifts like shoulder press and bench press. This could be due to one part of your body growing faster than another part. So instead i'll focus more on other parts of my body and allow myself to recover. If you have shoulder problems, (i read this on testosterone.net BTW) do rows. I'd say it's definately helped. Also try really to warm up that joint and muscle really good before even your warm up set. ie shoulder joint exercises (the ones you use a 5 or 10 pound dumbell) these really help a lot as well.