I have been using Glycan Aid HA now for almost 2 years. That is when my Yorkie broke her left rear leg, tore all the tendons and ligaments and her kneecap had to be redone. Yeppers she did a great job on herself! And 2 weeks ago she did her ACL on her rear right leg….not as bad, thank goodness! But…the Glycan Aid HA works….and everyone should use it with their dog…make it a daily routine. We do and even our Vet said it is GREAT stuff! Thanks!