I purchased this over a year ago for some knee pain - it helped. Recently, I had lower back and thigh pain. I attributed this to going up and down an extension ladder while painting for a few days...it just never went away. I thought it might be a hernia, Kidney stones, etc. Also, somewhat difficult to turn over in the morning. I started sleeping on my stomach, I felt much better but the pain was still there. At the same time, I started taking this product. It took a few days to realize it was mainly this supplement that helped. I just take so many supplements. I am 53 and don't take any prescriptions......going to add this back to my regiment for a while-fall yard work time