Plain-language summary
Mostly extrapolated from human OA trials; limited dog-specific RCTs.
About the ingredient
What it is
Organosulfur compound.
Why it's used
Included in joint-support formulas.
Also known as: Methylsulfonylmethane
Cited studies (0)
No individual studies indexed for this claim yet. Grade reflects our reviewers' overall read of the published literature.
Products in our catalog with MSM (5)
Educational information only. Not veterinary advice. Grades reflect published dog research and reviewer consensus, not marketing.