I have been using Flexadin with my 6 year old Thoroughbred mare for the past month. Competing at 1.15m and novice level eventing is hard on her joints and tendons even though she is cleared by a vet. I studied supplements for weeks before deciding on Flexadin to make sure she was in good health for the upcoming season. She used to be stiff in her hind legs after shows and long training sessions. Since the use of this product she has had no issues with stiffness at all and feels better in her movement. I have also started using it on my 13 year old Swedish Warmblood who competes 1.20m and at training level to keep him happy and healthy.