(Brookside) Command MSM contains only ultra-pure, filler-free MSM with no silicone dioxide. MSM is a naturally occurring source of bioavailable sulfur important in the formation of links between collagen molecules, which provides strength to tendons, ligaments, and joint tissues. Feed 10 grams (1/3 ounce) daily with feed to provide 10.000 mg MSM. Scoop enclosed. Powder.