4 pounds of 99 percent MSM (Methylsulfonylmethane) powder Supports healthy joint function for all horses and dogs This 4 pound bucket contains a 184 day supply for 1 adult horse ...

You may report side effects to Health Canada at 1-866-234-2345. Before taking methylsulfonylmethane, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies.