I was skeptical, but was willing to try it considering my joint pain as a 25 year old. Typically very healthy otherwise, but I did not want to revert to pain killers for achy joints. I started a small 1 week sample, with no results. I then got a 1 month pack, and after about 3-4 weeks I could feel the difference. I am close to 6 weeks in, and back to working out daily working out my legs normally - something I haven't been able to do in 6 months. Nothing else in my diet has changed. I'm sure it helps with other things as well that I don't notice, but for me, it significantly improved my issues.