Cosequin is a patented, scientifically researched nutritional supplement dispensed by thousands of veterinarians to help cats maintain healthy joints. As cats age, it is common for their joints to become less flexible which impacts their mobility and quality of life. You may have noticed that your cat is less eager to jump to her favorite spot. While she used to prowl and chase "prey", now she is content to rest. Cosequin contains TRH122* chondroitin sulfate, FCHG49* glucosamine hydrochloride and manganese ascorbate. These ingredients have been scientifically formulated to support and maintain the health of your cat's joints. Published clinical studies have shown that the specific combination of ingredients in Cosequin works together to maintain the structure of the cartilage in the joints while inhibiting the enzymes that break down cartilage. It is very important to note that the published clinical studies on Cosequin do not apply to other brands.