AniMed??? Pure MSM Horse Joint Supplement 99.9% Pure MSM A patented form of MSM with a bio-available source of dietary sulfur to aid in the synthesis of collagen which promotes joint cartilage and skin health. Features & Benefits of AniMed s Pure MSM: 100% Methylsufonylmethane (MSM) and no fillers a natural antioxidant inhibiting and reducing the pain and swelling associated with arthritis made in the USA Feed 1 tbsp twice daily for 6 days then 1 tbsp per day thereafter for maintenance. View manufacturer and/or label information