PureMSM is 99.9% pure and provides benefits other brands dont! The Only Clinically Proven MSM! Contains No Fossil Fuel Additives Or Heavy Metals Like Other Brands! Made From Ultra-Pure Food Grade MSM! All-Natural Pine Tree Source No Synthetics! Why Is PureMSM Better? Most forms of MSM, including those imported from China, are synthetic and are derived from a fossil fuel source. On the other hand, Natural Balance PureMSM is an all-natural source of MSM derived only from pine trees. PureMSM contains no addition or dilution with fossil fuel derived material.So, dont be fooled by cheap MSM brands that seem like a good buy, but in reality may contain fossil fuel additives or heavy metals (including lead!). With Natural Balance PureMSM, you get the purity guarantee of 99.9% ultra pure, all-natural, food grade MSM that gives you all the fabulous health benefits of MSM without the additives or heavy metals!