Last verified: 17 days ago
Methylsulfonylmethane (MSM)
Also known as: MSM, dimethyl sulfone, DMSO2, methyl sulfone, organic sulfur
Evidence under review. — Not yet rated
Sulfur compound with modest evidence for reducing mild knee pain and joint discomfort.
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What it does
MSM is a naturally occurring sulfur-containing compound found in small amounts in plants, animals, and humans. Clinical research suggests it may modestly reduce mild knee pain and improve...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
3000 mg daily based on available study data
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Found in
What the Science Says
MSM is a naturally occurring sulfur-containing compound found in small amounts in plants, animals, and humans. Clinical research suggests it may modestly reduce mild knee pain and improve joint-related quality of life, particularly in people with early-stage osteoarthritis. Lab studies show it can suppress inflammatory signaling pathways and reduce oxidative stress markers, though most of this evidence comes from cell and animal studies rather than large human trials.
What It Doesn't Do
Not proven to rebuild cartilage or reverse joint damage. No solid human evidence it treats serious arthritis on its own. Most osteoarthritis studies combine MSM with other ingredients like glucosamine and chondroitin, so MSM's individual contribution is unclear. No proven benefit for muscle building, weight loss, or detoxification. Animal and cell-lab findings don't automatically translate to humans.
Evidence-Based Benefits
May reduce mild knee pain and improve joint quality of life in healthy adults.
Weak EvidenceEffective at: 3000 mg daily
Supporting studies (click to view on PubMed):
As part of a multi-ingredient formula, reduces knee OA pain and improves joint function.
Weak EvidenceEffective at: No established standalone dose
Supporting studies (click to view on PubMed):
Suppresses inflammatory signaling and reduces oxidative stress markers in lab models.
Weak EvidenceEffective at: No established human dose
Supporting studies (click to view on PubMed):
In a chewing gum with EDTA and xylitol, reduces dental plaque comparably to chlorhexidine rinse.
Weak EvidenceEffective at: No established dose
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Unknown from provided studies — no human pharmacokinetic data in the provided papers; horse elimination data suggests it is absorbed and excreted renally over several days
Red Flags to Watch For
- Most positive OA studies use MSM in multi-ingredient combinations, making it impossible to isolate MSM's specific effect
- Very limited number of standalone human RCTs — only one small placebo-controlled trial on mild knee pain found in provided data
- MSM is a prohibited substance in horseracing due to anti-inflammatory/analgesic effects — consumers should check sport-specific banned substance lists
- Widely marketed for conditions (detox, skin, hair) with no supporting evidence in the provided research
Products Containing Methylsulfonylmethane (MSM)
See how Methylsulfonylmethane (MSM) is used in these analyzed products:
Frequently Asked Questions
What does Methylsulfonylmethane (MSM) do?
Sulfur compound with modest evidence for reducing mild knee pain and joint discomfort.
What is the effective dose of Methylsulfonylmethane (MSM)?
3000 mg daily based on available study data
Is Methylsulfonylmethane (MSM) safe?
Most positive OA studies use MSM in multi-ingredient combinations, making it impossible to isolate MSM's specific effect
What doesn't Methylsulfonylmethane (MSM) do?
Not proven to rebuild cartilage or reverse joint damage.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25