I started taking the Syalox 150 supplement from June 2017.I bought several bottles when I found that it works extremely well for me. I used to have a lot of pain in my knees from having arthritic deposits on the back of my knee caps. I was seriously thinking about having knee replacement surgery next year because the pain was so bad. After taking Syalox 150 for 4 weeks I was virtually pain free. I felt that I had finally found a supplement that works well and is affordable so I have continued using it.