Horse Health > Horse Supplements VITA-FLEX MSM ULTRA PURE HORSE SUPPLEMENT Price $14.27 Stock status: Out of Stock Stock status: In Stock Product Code: RJ495-101P Qty: Description Sizing Information Reviews Vita-Flex MSM Horse Supplement by Vita-Flex * Easy-to-give, odorless granules Vita-Flex MSM – The original methyl sulfonyl methane registered as MSM and covered by U.S. Patents. Granule supplement provides bio-available sulfur and MSM purified and licensed for dietary use. Contains 452 gms MSM per pound. Feed 1 heaping scoop (1/3 oz) twice daily for first 7 days, then 1 heaping scoop daily thereafter.