5/5
This takes the top spot in my list of joint supplements. I've tried a few of the better ones. My knee had been popping really bad for a long time from over-doing it on squats. There was also quite a bit of pain. After two weeks on Flexatril, the popping has greatly subsided and the pain has been greatly reduced. This is no coincidence. I should be back to squatting before too long. At a dollar a serving, this is a great value, and you can normally find a good deal.