Product Features 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 ...

Feed supplement additive MSM has been removed from the FEI’s prohibited substance list after a U-turn by the international federation. Confusion had been caused by the inclusion of MSM (methyl ...