Sorry to hear that. This supplement is what I take

http://www.amazon.com/Kirkland-Extra-Strength-Glucosamine-Chondroitin/dp/B003V2JBEK/ref=sr_1_2?ie=UTF8&qid=1442750084&sr=8-2&keywords=kirkland+glucosamine

 

Very effective.  Whenever I felt tight on knee, I will take one per day for two weeks and the knee will be fine.