I'm an avid senior softball player at the age of 62 but I became frustrated because of knee pain which was preventing me from playing or playing with excruciating pain. I've tried many different brands and I received limited relief this Puritan brand literally worked to eliminate joint pain in my throwing shoulder and my knees it was so evident. i recall that it started working within two weeks, it's now fun and enjoyable playing w/out pain . I'm going on my second year of taking it and I'll continue for the rest of life. For me, taking two at once in the morning works.....Aloha.
It works I'm writing this review to help others.