Methylsulfonylmethane. It is a dietary suppliment that provides sulfur which is necessry to many aspects of our body. It is an anti-inflamatory that is good for osteoarteritis, and excercise inflamation. I have used it for years for dogs and horses and have been using for myself for many months. Best of all, it seems to have no toxic dose and is side effect free. There is much on the web about it so do your own research.

Methylsulfonylmethane (MSM) is a sulfur-containing compound found in plant and animal tissues. - https://www.sciencedirect.com/topics/pharmacology-toxicology-and-pharmaceutical-science/methylsulfonylmethane