I have been taking glucosamine/chondroitin/msm for 6 months now, along with a steady dosing of cod liver oil. The results are proven. Many studies have been shown that joint pain and swelling decrease, cartilge heals, and flexabilitly increases, as does range of motion.
It took about 1 month to see results, but after that it was a night and day difference. I have noticed no side effects. My blood pressure / heart rate / vitals have not changed. I would recommend this suppliment to all.