I had been going through six weeks of physical therapy for knee pain and it wasn't getting any better. Found a vendor of RTPR at a local farmer's market and tried a sample right there. I got up, walked the rest of the market and as I was returning to my car it dawned on me that I had absolutely [relieved] pain! I quickly went back and bought the large tube and the roll on...RTPR made it possible that I could function with [relieved] pain. I have bought some for my family and friends and they are also amazed at how well this product works!