Pharma nord bio msm and silica 750mg 120 tablets 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