Some people don't think it works at all, but for me I now it works. I take Glucosamine supplements everyday and my joints have felt a lot better. I'm not really sure how it works, but my doctor told me about it and said that some people find it helps. I thought my pain was pretty bad before but now I'm feeling better for as long as I keep taking my glucosamine. My dose is about 500mg per day but you should ask your doctor first because it may be different for you. It's not a cure for joint pain, but it helps for sure.