The supplement market is crowded with products that promise joint relief. Most are backed by anecdote rather than evidence. MSM - methylsulfonylmethane - is different. It has been studied in controlled clinical trials, its mechanism of action is understood at a molecular level, and it has been used safely in both human and veterinary medicine for decades. That does not make it a cure. But it does make it worth examining seriously.
What is MSM?
MSM stands for methylsulfonylmethane. It is an organosulphur compound that occurs naturally in small quantities in food - green vegetables, meat, dairy - and is produced endogenously in the body. For supplemental use, it is manufactured as a white crystalline powder and is one of the most bioavailable forms of sulphur available to the body.
Sulphur matters because it is involved in over 140 biological processes. It is a structural component of collagen and connective tissue, contributes to the synthesis of glutathione (one of the body’s primary antioxidants), and plays a regulatory role in inflammation. Cartilage is sulphur-rich tissue. As we age and sulphur availability declines, the structural integrity of cartilage can deteriorate. MSM supplementation is one way to address that deficit.
What the clinical trials show
The most widely cited trial is the 2006 pilot study by Kim et al., published in Osteoarthritis and Cartilage. Fifty patients with osteoarthritis of the knee were randomised to receive either 3g of MSM per day or placebo over 12 weeks. The MSM group showed significant improvements in pain and physical function compared to placebo, with no serious adverse events reported.
A second randomised, double-blind, placebo-controlled trial by Usha and Naidu, published in Clinical Drug Investigation in 2004, compared MSM alone, glucosamine alone, and their combination against placebo. All active treatment arms showed meaningful improvements in pain and function. The combination of MSM and glucosamine produced the most pronounced results, suggesting a synergistic effect.
More recently, a 2023 trial by Kalman et al., published in Nutrients, randomised 88 participants with mild knee pain to either 2g of MSM per day or placebo for 12 weeks. The MSM group showed statistically significant improvements in knee quality of life across multiple measured domains.
Taken together, the picture from randomised controlled trials is consistent: MSM at doses of 2–3g per day reduces pain and improves function in adults with knee osteoarthritis. These are not dramatic, overnight results. They are meaningful, measured improvements over a sustained period of use.
How MSM works: the mechanism
Understanding why MSM appears to help requires looking at the biology of joint inflammation.
Osteoarthritis involves the progressive breakdown of cartilage alongside chronic low-grade inflammation. Central to that inflammatory process is NF-κB, a protein complex that acts as a master switch for inflammation in the body. When NF-κB is activated, it drives the expression of pro-inflammatory cytokines including interleukin-1 (IL-1), interleukin-6 (IL-6) and tumour necrosis factor-alpha (TNF-α). These cytokines sustain inflammation and contribute directly to cartilage degradation.
Research demonstrates that MSM inhibits NF-κB activity, which in turn suppresses the expression of IL-1, IL-6 and TNF-α at the mRNA level. This is not a general anti-inflammatory effect - it is a specific, documented mechanism that interrupts the signalling cascade driving joint inflammation.
MSM also provides sulphur directly to cartilage tissue, supporting its structural maintenance, and its antioxidant properties help to reduce oxidative stress in synovial fluid and surrounding tissue. The result is a compound that addresses joint inflammation from multiple angles simultaneously.
The OSKIA origin story
OSKIA did not arrive at MSM through trend-spotting. It arrived through lived experience.
Georgie’s father founded NAF - Natural Animal Feeds - which began using MSM as a joint supplement for horses around 35 to 40 years ago. The results in equine joint health were well established within veterinary and performance animal care long before the ingredient entered mainstream human supplement use.
As a teenager, Georgie underwent multiple knee operations. Her mother had been part of the British ski team and the family skied seriously. After her last operation, Georgie was told by surgeons that she would never ski again. Her father suggested she try MSM. Having seen what it did for horses and dogs - improved mobility, better coat condition, faster recovery - she agreed.
Her knees recovered completely. She went on to complete triathlons and marathons. But what caught her attention alongside the joint recovery was what happened to her skin. She had teenager skin: rosacea, eczema, acne. After taking MSM, all of it cleared. Hair and nails grew faster too.
That observation, that sulphur could work systemically from the inside out, became the founding idea behind OSKIA. When Georgie later left a career as a food editor at Condé Nast to formulate skincare, MSM was the starting point. OSKIA pioneered its use as a skin ingredient, and it remains central to the brand. The supplement side of the business grew from the same root: the belief that MSM deserves to be taken seriously as a tool for whole-body health.
OSKIA MSM Bio-Plus
OSKIA MSM Bio-Plus is OSKIA’s high-strength MSM supplement, developed to deliver clinically meaningful doses in a form the body can absorb efficiently. It is formulated by the same team that develops OSKIA’s skincare range, with the same commitment to ingredient quality and rigorous sourcing.
MSM Bio-Plus is designed for consistent daily use. It draws directly on the same ingredient tradition that gave rise to OSKIA as a brand, and is built around the same principle: that what you put in your body matters as much as what you put on it.
What to expect
MSM is not a fast-acting painkiller. The clinical evidence suggests benefits emerge over 8 to 12 weeks of consistent daily supplementation. Most trial participants did not see significant change in the first few weeks. That is consistent with how MSM works: it supports tissue at a structural and inflammatory level, which takes time.
Realistic expectations matter. MSM has good clinical evidence for reducing pain and improving joint function in people with mild to moderate osteoarthritis. It does not reverse structural damage that has already occurred, and it is not a replacement for medical treatment. Anyone with significant joint disease should be under the care of their GP or rheumatologist, and MSM should be considered a complement to, not a substitute for, medical advice.
What the evidence does support is that, for people with joint pain who want to do something proactive and evidence-based, MSM is a credible option. It has a strong safety record, a documented mechanism of action, and consistent results across multiple independent trials.
Frequently asked questions
How long does it take for MSM to work for joint pain?
The clinical trials showing significant results used supplementation periods of 12 weeks. Most participants reported improvements emerging gradually from around weeks 6 to 8 onwards. Consistent daily use over at least three months gives the most reliable picture of whether MSM is working for you.
What dose of MSM is used in clinical trials for arthritis?
The two most referenced trials used 3g per day (Kim et al., 2006) and 2g per day (Kalman et al., 2023). Both showed significant improvements in pain and function versus placebo.
Can I take MSM alongside my existing medications or supplements?
MSM has a good safety profile and is generally well tolerated. However, if you are taking prescription medication - particularly blood thinners or anti-inflammatory drugs - you should check with your GP before adding any new supplement to your routine.
Is MSM the same as glucosamine or chondroitin?
No. MSM, glucosamine and chondroitin are distinct compounds that work through different mechanisms. The Usha and Naidu trial found that MSM and glucosamine in combination produced better results than either alone, suggesting they complement rather than duplicate each other.
Does MSM have any side effects?
MSM is consistently well tolerated in clinical trials. Some people report mild digestive sensitivity when starting supplementation, which typically resolves within the first week or two. Serious adverse events have not been reported in trial populations at the doses used for joint health.
Clinical references
- Kim LS, et al. “Efficacy of methylsulfonylmethane (MSM) in osteoarthritis pain of the knee: a pilot clinical trial.” Osteoarthritis and Cartilage, 2006.
- Usha PR, Naidu MU. “Randomised, Double-Blind, Parallel, Placebo-Controlled Study of Oral Glucosamine, Methylsulfonylmethane and their Combination in Osteoarthritis.” Clin Drug Investig, 2004.
- Kalman DS, et al. “Methylsulfonylmethane Improves Knee Quality of Life in Participants with Mild Knee Pain.” Nutrients, 2023.
- Ahn H, et al. “Methylsulfonylmethane inhibits NF-κB activation and TNF-α production.” Phytomedicine, 2015.
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