The pure MSM powder from Paws & Patch is suitable as a daily BARF or feed supplement. MSM stands for methylsulfonylmethane and is also called organically bound sulfur due to its bond with hydrocarbons. Sulfur is ubiquitous in the body and involved in numerous metabolic processes. The MSM powder with a purity of over 99.9% is free from artificial additives or fillers. It is also free from the commonly used anti-caking agent silicon dioxide. Silicon dioxide is supposed to prevent clumping of MSM powder. This anti-caking agent does not need to be declared but is a component of many MSM products available on the market. Clumping of MSM is not a defect and does not affect the quality. Simply loosen the powder occasionally with a spoon. Sulfur Supplier The sulfur compound MSM has a sulfur content of 34%. Sulfur is an important mineral and involved in numerous metabolic processes.