question: hello,i am 45 years old into active sports, playing badminton twice a week for the last 10 years. had pain in my knees and diagnosed as OA. Dr prescribed orcerin GM as well as cartigen which I have been taking regularly last 3 months. Still feeling my knees are weak and cannot climb stairs. No pain around the joint but can feel some hard swelling behind the knee supposed to be due to tight hamstrings/ sciatica. please advise. does orcerin gm cause weight gain?