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MSM FEI Ruling Info

MSM FEI Ruling Info;
Is MSM a prohibited substance under the racing and FEI regulations?

MSM or Methylsulfonylmethane is added to a lot of horse NZ feed supplements. Which is logical as there are several claims MSM has helped ease a number of ailments in horses young & old.

Please read the renewed warning for supplements in horses, humans.

The advice comes after the revision of the World Anti-Doping Code (WADA) 2015, which is effective from January 1. The FEI General Assembly has significantly amended its equine and human anti-doping rules have been significantly. MSM is an approved supplement under the FEI ruling since January 2018.
In short; you are as a competitor, responsible for any feed supplement you give to your horse that it is within the regulations of the FEI or Racing Industry.

MSM is know under a variety of names eg;

  • methyl sulfone
  • methylsulfonylmethane
  • sulfonylbismethane
  • and the most common, methanesulfonylmethane.

Putting them through the FEI database we get a result on Dimethyl Suphone (Dimethyl Sulfone).

FEI Classification:a NON-Prohibited Substance Controlled Medication Definition:Solvent Information: It is used in the treatment and prevention of osteoarthritis, seasonal allergic rhinitis, and interstitial cystitis.


  • With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with loco-motor problems in particular must always be provided with adequate rest. 


CONTENTS: No fillers, just pure Glucosamine mixed with naturally extracted MSM.

To order MSM for horses click here

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