NaturVet MSM Pure Methylsulfonylmethane (250 Tablets) is comprised of 34% bio-available sulfur, making it the richest source of organic sulfur, available. Sulfur is critical in the formation of collagen and glucosamine which are vital components for healthy bones, joints, ligaments, and tendons. MSM is also recommended by veterinarians as a great addition to any joint formula.
"Recommended by veterinarians for animals with arthritic conditions."
Just the best by westiemom from Redwood City, CA11/06/2012
As a 4 time Westie owner I have used this product "on" my dogs for years. I have definitely seen a difference in first my senior dogs stiff walk, and now where we are owners of a westie with HD. It really helps!! I have to say that I do combine it with another product, but still believe that one product alone doesn't cut it.