This product really helps with my lower back pain and stiffness in the lower back and around my knees. I'm in my mid 30s but have been having problems with lower back for a long while. On bad days not even heating pad or a massage would help much. I stumbled on this product while searching the site and decided to give it a try. My body normally doesn't respond to product quickly, but I started to feel less stiff in my lower back when getting up from sitting position. I've been taking this for almost two months now and also notice my knees are more flexible and pain free during the constant up and down motion while doing yard work. Really great product!