MSM is most relevant for: Endurance athletes (runners, cyclists, triathletes) who accumulate high mechanical load on joints Strength athletes doing high-frequency training who experience persistent muscle soreness Older athletes (35+) where connective tissue regeneration slows and joint wear accumulates Athletes returning from injury where cartilage and tendon support is especially valuable Anyone with exercise-associated joint discomfort who wants a well-tolerated, low-risk option MSM is less relevant as a primary performance supplement for untrained individuals or those seeking acute gains in strength or speed. Its benefit is more in the maintenance-and-recovery domain.

MSM for Athletes: Performance Evidence

MSM (methylsulfonylmethane) is a naturally occurring organic sulphur compound found in small amounts in many foods. As a supplement it has attracted attention in athletic circles primarily for two properties: reducing exercise-induced muscle soreness and supporting connective tissue — joints, cartilage, and tendons — that bear the load of training. The evidence base is smaller than for creatine or caffeine, but several well-designed trials offer a meaningful signal.

Mechanism in Sport

Sulphur is a structural component of connective tissue and is required for the synthesis of collagen and keratin. MSM provides bioavailable sulphur, which in theory supports the maintenance and repair of cartilage and tendons under mechanical load.

In addition, MSM has demonstrated antioxidant and anti-inflammatory properties in cell and animal studies — inhibiting NF-kB signalling, a central pathway in the inflammatory response. Post-exercise inflammation is normal and necessary for adaptation, but excessive or prolonged oxidative stress delays recovery. MSM may attenuate the excessive component without blunting the adaptive signal entirely.

MSM also appears to inhibit the release of certain pro-inflammatory cytokines from synovial cells in the joint lining, which may explain its benefit in joint pain specifically.

Strength and Endurance Evidence

A randomised, double-blind, placebo-controlled trial by Kim et al. (2006) found that MSM supplementation over six weeks reduced exercise-induced pain and improved physical function scores in adults performing regular lower-body exercise, with the effect apparent at 3 g/day.

A later RCT in healthy adults performing a bout of high-intensity exercise found that MSM supplementation was associated with a reduction in markers of oxidative stress and lower self-reported muscle soreness in the 48 hours post-exercise compared with placebo (Nakhostin-Roohi et al., 2011). This suggests a recovery-support role rather than an acute performance enhancement.

For joint-specific outcomes, a meta-analysis of RCTs in osteoarthritis patients showed statistically significant reductions in pain and improvements in physical function with MSM supplementation compared with placebo (Debbi et al., 2011). While the osteoarthritis population differs from healthy athletes, the joint-protection mechanism is likely relevant for athletes with heavy training loads or existing joint discomfort.

Effective Protocol

The most commonly studied and effective dose range is 1.5–3 g per day, taken consistently over several weeks. MSM's benefits are cumulative rather than acute — taking it once before a session will not replicate the effect of sustained daily dosing over four to eight weeks.

Splitting the dose (morning and evening) may reduce the risk of mild gastrointestinal discomfort in sensitive individuals. MSM can be taken with or without food.

Products available at maxfit.ee include OstroVit MSM 1200mg 60caps, OstroVit MSM 300g (powder form for flexible dosing), and OstroVit MSM 90tabs, as well as combination products like MST Chondroitin Glucosamine MSM + HA 90tabs and OstroVit Glucosamine + MSM + Chondroitin 90tab for athletes wanting joint support in one product. All of these are available via maxfit.ee/et/category/msm-et or the broader luud-kohred-sidemed-liigesed category.

Who Benefits

MSM is most relevant for:

Endurance athletes (runners, cyclists, triathletes) who accumulate high mechanical load on joints
Strength athletes doing high-frequency training who experience persistent muscle soreness
Older athletes (35+) where connective tissue regeneration slows and joint wear accumulates
Athletes returning from injury where cartilage and tendon support is especially valuable
Anyone with exercise-associated joint discomfort who wants a well-tolerated, low-risk option

MSM is less relevant as a primary performance supplement for untrained individuals or those seeking acute gains in strength or speed. Its benefit is more in the maintenance-and-recovery domain.

Honest Verdict

MSM has a coherent mechanism and a respectable body of RCT evidence for reducing exercise-induced soreness and supporting joint function. The effect sizes in the trials are moderate — it will not dramatically transform recovery, but for athletes with heavy training loads or joint sensitivity, it is one of the better-supported options in the joint-support category. The safety profile is very good: MSM is well tolerated at doses up to 3 g/day with minimal side effects. The main caveat is that results require consistent daily supplementation over weeks, not hours.

FAQ

How long before I notice the effects of MSM?

Most trials using MSM for soreness and joint outcomes report measurable changes at four to six weeks of consistent supplementation. Some individuals notice benefits sooner, but expecting results within the first week is unrealistic based on the trial data.

Can I take MSM with glucosamine and chondroitin?

Yes, and combination products exist precisely because these three compounds have complementary mechanisms. Glucosamine and chondroitin support cartilage matrix; MSM provides sulphur and anti-inflammatory effects. No negative interactions are documented.

Is MSM safe for long-term use?

Human studies have tracked MSM supplementation for up to six months without safety signals. Longer-term data is limited, but the compound is a naturally occurring substance found in food and the body, and the risk profile at typical supplement doses is low.

References

Kim, L. S., Axelrod, L. J., Howard, P., Buratovich, N., & Waters, R. F. (2006). Efficacy of methylsulfonylmethane (MSM) in osteoarthritis pain of the knee. Osteoarthritis and Cartilage, 14(3), 286-294. https://pubmed.ncbi.nlm.nih.gov/16309928/

Nakhostin-Roohi, B., Barmaki, S., Khoshkhahesh, F., & Bohlooli, S. (2011). Effect of chronic supplementation with methylsulfonylmethane on oxidative stress following acute exercise in untrained healthy men. Journal of Pharmacy and Pharmacology, 63(10), 1290-1294. https://pubmed.ncbi.nlm.nih.gov/21899544/

Debbi, E. M., Agar, G., Fichman, G., Ziv, Y. B., Kardash, R., Debi, R., Markovits, E., & Halperin, N. (2011). Efficacy of methylsulfonylmethane supplementation on osteoarthritis of the knee: A randomized controlled study. BMC Complementary and Alternative Medicine, 11, 50. https://pubmed.ncbi.nlm.nih.gov/21708034/