For years I endured swelling and aches in both knees due to early injuries and subsequent stiffness. Knee replacements were the option offered by my doctor. I really didn’t want that until all possibilities were investigated. I had heard ads for SierraSil and decided I need to try it. Four day later, swelling was noticeably reduced, mobility restored to normal and aches controlled. I am back to walking 2 miles a day and enjoying life immensely. Thank you SierraSil. Life is good.