Age and exercise degrade joint fluid, but LubriSyn replenishes natural HA to help keep joints mobile and healthy Hyaluronan (HA) is a naturally occurring high-molecular-mass glycosaminoglycan found throughout the body's connective tissue, epithelial and neural tissue LubriSyn is the most effective natural joint supplement for people, their horses and their dogs Liquid supplement Clear and Tasteless Hyaluronan (HA) is a naturally-occurring lubricant that helps cushion every joint in the body. Your canine companion has over 200 joints in his body. For the competitive edge in obedience and agility, your dog's joints must be supple and lubricated. LubriSyn CA is a liquid oral joint supplement made of hyaluronan (HA), a naturally occurring part of normal joint fluid. Unlike glucosamine and chondroitin, HA is easily absorbed because it is found naturally in your dog's body.