If you're looking for the purest natural-source (i.e., not manufactured from petroleum) MSM that humans know how to manufacture, look no farther. DistilPure™ MSM Crystal Flakes are distilled from the natural residue of wood pulp from the paper industry, which consists largely of pine trees. If you use MSM, you owe it to yourself to use DistilPure™. You can't get it in stores - order some today! Please.