Recommended amount is 10 grams per day, or at the advice of your veterinarian. You may have to go as high as 20 grams per day for effect.
MSM is a commonly used supplement with anti-inflammatory properties. Is is especially for horse that compete, as it is not on the banned substance list for most organizations. (Please be sure to check with your organization to be sure.)
Approximately 12 grams per US tablespoon.
Disclaimer: This product is not intended to diagnose, treat, cure, nor prevent any disease. If your horse experiences any adverse effects from using this supplement, discontinue use and contact your veterinarian. For use in animals only.