Methylsulfonylmethane, commonly known as MSM, is a naturally occurring compound found in plants, animals, and humans. It is a sulfur-containing compound that is often used as a dietary supplement for its potential health benefits, particularly in supporting joint health and reducing inflammation. MSM is believed to help alleviate pain and improve mobility in individuals with conditions like osteoarthritis. It is also thought to have antioxidant properties, which may contribute to overall wellness. While many people report positive effects, scientific research on its efficacy is still ongoing.