Pure MSM Dietary Suplement by Animed Horse Care is a bio-available source of dietary sulfur for connective tissue support. MSM is a natural antioxidant; antioxidants help remove damaging free radicals. MSM Pure Powder, as a dietary supplement, is a bio-available soure of dietary sulfur for connective tissue support. MSM is a natural antioxidant; antioxidants help remove damaging free radicals. ? Purest form available. ? Will not get hard. ? No fillers. ACTIVE INGREDIENTS: Assay of contents per ounce: Methylsulfonylmethane* 28,265mg Guaranteed Analysis: Methylsufonylmethane (minimum) 100%