Pharma Nords Bio-MSM + Silica is a combination nutritional supplement containing MSM (methyl sulphonyl methane) and silica. MSM is a naturally occurring organic sulphur containing substance and vegetal silica, an extract of the herb horsetail grass, is a natural source of the essential trace mineral silicon. Sulphur and silicon are required by the body for the normal growth and development. The level of silica in the body declines with aging. MSM and silica are required for the normal formation of bone, and collagen in connective tissue (cartilage, tendons, ligaments), and for healthy skin, hair and nails. MSM and silica help maintain the flexibility of joints and arteries.