I'm 37 years old and have been stepping on a 6" step for years. I started having knee pains recently, different pains in different places in each knee. I read the thread about Glucosamine/Chondroitin and decided to start taking it. After about a week of taking it my right knee started snap-crackle-popping when I bend it. I thought it might be a sign that the G/C is doing something, so I'm continuing to take it. The knee pains are still there and I'm down to a 4" step. My knees feel so fragile and delicate. I've never injured them, so I was wondering if this is a normal sign of aging, or is there something wrong? Any feedback would be appreciated, because I'm real close to going to the doctor for x-rays, because I can't think of anything else to do. Could the Glucosamine be doing more harm than good? If I have to stop stepping my life will be over. Dig my grave. Please help!