Horses love this formula!! This award winning formula, developed in 1997, was the first of it's kind to deliver the advanced combinations of Glucosamine HCl, MSM and carrier anti-oxidants. It's benefits have been recorded extensively and is the benchmark for all other joint aid products on the market. There is a difference however, this formula works synergistically to increase absorption and the speed in which it starts to relieve pain due to osteoarthritis and so much more.