Sure Nutrition MSM, The Natural Anti-Inflammatory! MSM is a naturally occurring nutrient that provides bioavailable sulfur. Sure Nutrition MSM increases circulation, making it great for wind puffs, sore backs and hocks! 9,4300 mg MSM per 1/3 oz. scoop. Feed 1 scoop twice daily for 7 days, then 1 scoop daily for maintenance. Flake powder.