MSM
supplement · base score 1 · also listed as methylsulfonylmethane, msm, methylsulphonylmethane, methyl sulphonyl methane, methyl-sulfonyl-methane, dimethyl sulphone, methysulfonylmethane
What is it?
MSM is a supplement added for a specific benefit. Graded good: a real, recognisable ingredient that adds nutritional value, so it lifts a product’s score.
At a glance
- Category
- supplement
- Grade
- good
- Base score
- 1 (from −1 to 1; higher is better)
- Found in
- 278 products
- Also listed as
- methylsulfonylmethane, msm, methylsulphonylmethane, methyl sulphonyl methane, methyl-sulfonyl-methane, dimethyl sulphone, methysulfonylmethane
Common questions about msm
Is MSM good for dogs?
Yes, we grade it as a good ingredient: recognisable and nutritionally useful, so it lifts a product’s score. Bear in mind that no single ingredient decides quality; the whole recipe and its balance matter more.
How many UK dog foods contain msm?
278 UK products list msm as an ingredient in our database. The full list is shown below, sorted by rating.
What else is msm called on labels?
Manufacturers list it under several names: methylsulfonylmethane, msm, methylsulphonylmethane, methyl sulphonyl methane, methyl-sulfonyl-methane, dimethyl sulphone, methysulfonylmethane. We match all of these to the same glossary entry when we read a label.
How does Open Dog Food grade msm?
We grade it good, our highest grade, reserved for recognisable ingredients that add real nutritional value. Every ingredient is converted to its dry-matter share and scored from our glossary before a recipe gets its 1-100 rating; the full method is on our methodology page.
Is MSM safe for dogs?
MSM is generally used in small supplemental amounts in pet food. Some dogs may experience digestive upset, and high-dose supplements should only be given under veterinary advice.











