tuneTypical Dose
1,500-3,000 mg MSM twice daily (3,000-6,000 mg/day total)
Mineral
Sulfur (MSM)
Sulfur (S, as MSM or organic sulfur compounds)
Evidence TierBWADA NOT PROHIBITED
watchEffect Window
Joint pain: 2-12 weeks. Exercise recovery: days
check_circleCompliance
WADA NOT PROHIBITED
Overview
Clinical Summary
MSM (methylsulfonylmethane) is an organosulfur compound used for joint pain and inflammation-related symptoms. It is used for osteoarthritis discomfort and exercise recovery soreness, with modest effect sizes.
Randomized trials show modest reductions in osteoarthritis pain and improved joint function, typically emerging over weeks. MSM may reduce exercise-induced soreness and oxidative stress biomarkers. Minority studies report improvements in allergic rhinitis symptoms and some skin appearance measures. Effects are moderate and depend on dose and duration, with gastrointestinal tolerance influencing usable intake.
MSM donates sulfur for glutathione synthesis and connective tissue maintenance. Reduces inflammatory cytokines via NF-kB inhibition.
Outcomes
What This Is Expected To Influence
Primary Outcomes
- Modest reduction in osteoarthritis pain and improved physical function (WOMAC scores).
Secondary Outcomes
- Reduced exercise-induced muscle damage and soreness.
- Supports glutathione synthesis and antioxidant defense.
Safety
Contraindications and Interactions
Contraindications
- No absolute contraindications established
Side effects
- Mild GI upset (bloating, nausea, diarrhea)
- Headache at initiation
Interactions
- Theoretical additive effect with anticoagulants at very high doses
Avoid if
- No specific populations identified
Evidence
Study-level References
sulfur-SRC-001Randomized controlled trial (pilot)
Sourceopen_in_newKim LS, et al. *Efficacy of methylsulfonylmethane (MSM) in osteoarthritis pain of the knee: a pilot clinical trial.* Osteoarthritis Cartilage. 2006.
Population: Adults with knee osteoarthritis (N=50)
Dose protocol: MSM 3,000 mg BID (6,000 mg/day) vs placebo for 12 weeks
Key findings: MSM group showed significant improvements in WOMAC pain and physical function compared to placebo.
Notes: Pilot study with small sample size. Effect direction consistent with larger body of evidence.
Paper content
MSM group showed significant improvements in WOMAC pain and physical function compared to placebo.
sulfur-SRC-002Randomized controlled trial
Sourceopen_in_newDebbi EM, et al. *Efficacy of methylsulfonylmethane supplementation on osteoarthritis of the knee: a randomized controlled study.* BMC Complement Altern Med. 2011.
Population: Adults with knee osteoarthritis (N=49)
Dose protocol: MSM 1,125 mg TID (3,375 mg/day) vs placebo for 12 weeks
Key findings: MSM improved pain and physical function on WOMAC subscales; improvements reached significance by week 12.
Notes: Consistent with Kim 2006; dose was lower but still within effective range.
Paper content
MSM improved pain and physical function on WOMAC subscales; improvements reached significance by week 12.
sulfur-SRC-003Randomized controlled trial
Sourceopen_in_newKalman DS, et al. *Influence of methylsulfonylmethane on markers of exercise recovery and performance in healthy men.* J Int Soc Sports Nutr. 2012.
Population: Healthy active men (N=24)
Dose protocol: MSM 3,000 mg/day vs placebo; 28 days pre-loading
Key findings: MSM group showed reduced muscle soreness, lower homocysteine, and improved antioxidant capacity after exercise challenge.
Notes: Small sample size; supports exercise recovery claim but more research needed in diverse athletic populations.
Paper content
MSM group showed reduced muscle soreness, lower homocysteine, and improved antioxidant capacity after exercise challenge.
sulfur-SRC-004Randomized, double-blind, placebo-controlled trial
Sourceopen_in_newToguchi A, Noguchi N, Kanno T, Yamada A. Methylsulfonylmethane improves knee quality of life in participants with mild knee pain. A randomized, double-blind, placebo-controlled trial. Nutrients. 2023;15(13):2995. doi:10.3390/nu15132995. PMID:37447322.
Population: Healthy Japanese adults with mild knee pain.
Dose protocol: MSM 2,000 mg/day versus placebo for 12 weeks
Key findings: JKOM total score improved significantly (P=0.046) along with health condition subscale (P=0.032) in adults with mild knee pain.
Notes: Extends MSM evidence to a milder, non-osteoarthritis population at a lower dose.
Paper content
This 12-week placebo-controlled trial in adults with mild knee pain found a small but statistically significant improvement in total JKOM score and knee-related quality-of-life measures with 2 g/day of MSM. It supports a symptom-level benefit outside established osteoarthritis, but the effect size was modest and the population had mild baseline symptoms rather than clinically significant OA.
sulfur-SRC-005Randomized, double-blind, placebo-controlled trial.
Sourceopen_in_newMiller L, Thompson K, Pavlenco C, et al. The effect of daily methylsulfonylmethane (MSM) consumption on high-density lipoprotein cholesterol in healthy overweight and obese adults: a randomized controlled trial. Nutrients. 2021;13(10):3620. doi:10.3390/nu13103620. PMID:34684621.
Population: 22 healthy overweight or obese adults.
Dose protocol: MSM 3 g/day versus placebo for 16 weeks
Key findings: HDL cholesterol significantly elevated at 8 weeks (P=0.008) and 16 weeks (P=0.013) compared to baseline.
Notes: Small sample (n=22). Novel lipid endpoint for MSM. Needs replication.
Paper content
This 16-week double-blind RCT tested MSM at 3 g/day in 22 overweight or obese adults. HDL cholesterol was significantly elevated at 8 weeks (P=0.008) and 16 weeks (P=0.013) compared to baseline. The finding is interesting because it extends MSM evidence beyond joint pain into a cardiometabolic lipid endpoint. The study is limited by its small sample size and the fact that HDL was not a primary efficacy endpoint in prior MSM literature. It supports the hypothesis that MSM may have broader metabolic effects through its antioxidant and anti-inflammatory activity, but the result needs replication in larger trials before it can be considered established.