Equine america glucosamine msm joint powder the equine america glucosamine msm joint powder has only 12 000miligrams of glucosamine per serving fortified with msm and ha to help support and maintain joint health in your horse joint health powder fortified with msm and ha 12 000mg of glucosamine per serving composition glucosamine sulphate 2kcl 404 500mgkg dextrose 341 000mgkg maltodextrin methylsulphonylmethane msm sodium hyaluronate ha 300mgkg 2 month su