![](https://simpletruths.me.uk/wp-content/uploads/2018/11/Methylsulfonylmethane-150x150.jpg)
What is MSM? MSM (methylsulfonylmethane), also known as dimethyl sulfone (DMSO2) and methyl sulfone, is an organic sulfur-containing compound that is essential for optimal health. Without sufficient MSM sulfur, your body cannot maintain an appropriate level of homeostasis.