Nature's Lab MSM, 1000 mg, 60 Count

What the brand says

Methylsulfonylmethane, or MSM, is an organic source of sulfur, a mineral found naturally in plants and protein-rich foods such as meat, eggs and legumes. Sulfur is also present in every cell of the body. It's necessary for the production of collagen, the main structural component of cartilage and connective tissue.