Fitness Labs MSM 1,000 mg per Capsule, 300 Capsules

What the brand says

MSM (Methylsulfonylmethane) is a sulfur compound found in our bodies as well as in common beverages and foods such as milk, tea and green vegetables. Sulfur's essential functions include maintaining the structure of proteins, collagen and keratin in the body -- the building blocks of skin, hair, nails, joints and other connective tissues. Studies on MSM have shown its benefits for muscle and joint issues, and strains and athletic injuries when taken in a dose between two and three grams daily for approximately six weeks. For general health, take one gram daily.