Symptoms of Low MSM (Methylsulfonylmethane): Causes and Treatment
Deficiency
Symptoms & causes
MSM (methylsulfonylmethane) is an organosulfur supplement — not an essential nutrient. There is no recognized MSM deficiency syndrome, no reference range, and no diagnostic test for 'low MSM.' Its evidence is primarily for joint pain, and even there the data is limited and inconclusive.
MSM, or methylsulfonylmethane, is a sulfur-containing compound found in trace amounts in some foods and widely sold as a supplement for joint health. Unlike vitamins or minerals, MSM is not classified as an essential nutrient, meaning your body does not require it from the diet to function normally. While some small studies suggest it may help with osteoarthritis pain and exercise recovery, the overall evidence is limited, and there is no such thing as an MSM deficiency.
This is general nutrition and wellness information, not medical advice. If you're on a weight-loss medication or managing a health condition, confirm specifics with your clinician.
Symptoms of low MSM (Methylsulfonylmethane) — an organosulfur compound (dimethylsulfone); present in small amounts in some foods and beverages; marketed as a supplement for joint health, inflammation, and exercise recovery; NOT classified as an essential nutrient; the body has dietary sulfur needs but MSM is not the required source
Everyday signs are on the left; the ones on the right mean it's time to check in with a clinician.
Everyday signs
Common symptoms
- None — no recognized deficiency syndrome; there is no established symptom set for 'low MSM'
Don't wait
See a doctor if
- Adverse effects from MSM supplements (not deficiency): allergic reactions (skin rash, itching, swelling)
- GI symptoms (nausea, diarrhea, bloating)
- Headache
- Any allergic reaction warrants medical attention
Who is most likely to run low
Some people are more prone to falling short than others — including many people on a weight-loss journey who are simply eating less.
- No deficiency population
What causes low MSM (Methylsulfonylmethane) — an organosulfur compound (dimethylsulfone); present in small amounts in some foods and beverages; marketed as a supplement for joint health, inflammation, and exercise recovery; NOT classified as an essential nutrient; the body has dietary sulfur needs but MSM is not the required source
- Not applicable — MSM is not an essential nutrient; no dietary deficiency state exists
How low levels are diagnosed
No diagnostic test for MSM status; not part of any standard or specialty nutrition panel
How it's corrected
Most gaps close with food first, and supplementation when a clinician recommends it.
MSM is found in trace amounts in garlic, onions, asparagus, beer, coffee, tea, and some raw animal products, but food-source amounts are nutritionally insignificant and far below doses used in research. Oral MSM supplements, typically 1,500–6,000 mg per day, have been used in research trials for osteoarthritis, often combined with glucosamine and/or chondroitin. There is no established corrective dose for any deficiency because no deficiency exists.
How to keep levels up
Not applicable (no deficiency to prevent)
When to see a clinician
For persistent joint pain — a clinician can diagnose the cause (osteoarthritis, rheumatoid arthritis, injury) and guide treatment. For allergic reactions to supplements.
MSM Is Not a Nutrient — And That Changes Everything About This Search
If you typed 'symptoms of low MSM' into a search bar, you are applying a deficiency model — the kind we use for iron, vitamin D, or magnesium — to a compound that does not work that way in the body. MSM is not an essential nutrient, and there is no recognized deficiency state.
MSM, or methylsulfonylmethane, is an organosulfur compound (specifically, dimethylsulfone) found in trace amounts in garlic, onions, asparagus, coffee, tea, and some raw animal foods. It is also produced in tiny quantities by the natural oxidation of DMSO in the environment. The body does need sulfur — it is a component of amino acids like methionine and cysteine, which are building blocks for proteins, enzymes, and connective tissue. But your body obtains that sulfur from dietary protein, not from MSM specifically.
This distinction matters because many supplement marketing materials blur the line between 'your body needs sulfur' and 'your body needs MSM.' The former is true; the latter is not. You cannot be 'MSM deficient' any more than you can be 'glucosamine deficient' or 'resveratrol deficient.' These are compounds that may have pharmacological effects at supplemental doses, but they are not required for normal physiological function.
The practical implication: if you are experiencing joint pain, fatigue, or inflammation and wondering if low MSM is the cause, the answer is no. Those symptoms have real causes — osteoarthritis, autoimmune conditions, overtraining, poor sleep, nutritional gaps in actual essential nutrients — and they deserve a workup that starts with a clinician, not a supplement bottle.
Bottom line
Your body gets sulfur from protein (methionine, cysteine) — not from MSM specifically; you cannot be 'MSM deficient' any more than you can be 'red-wine deficient.'
What the NCCIH and Research Actually Say About MSM for Joint Pain
The primary reason people take MSM is osteoarthritis, particularly of the knee. If you strip away the deficiency framing, the real question becomes: does MSM supplementation reduce joint pain in people who already have arthritis? The answer, per the National Center for Complementary and Integrative Health (NCCIH), is that the evidence is limited and inconclusive.
Several small randomized controlled trials have tested MSM for knee osteoarthritis, often at doses of 1,500 to 6,000 mg per day. Some of these trials report statistically significant reductions in pain and improvements in physical function compared to placebo. A 2011 study in Osteoarthritis and Cartilage found that 3,000 mg of MSM twice daily modestly reduced pain and improved function over 12 weeks. However, the effect sizes were small, and the trial itself was modest in scale.
The methodological concerns are real. Many MSM trials are short (12 weeks or less), have small sample sizes, and are funded by supplement manufacturers. The NCCIH explicitly notes that the evidence is not strong enough to draw firm conclusions. This puts MSM in a similar category to glucosamine and chondroitin — some signal, plenty of noise, and no definitive answer from large, independent trials.
The FDA has not approved any health claim for MSM. It is regulated as a dietary supplement, which means manufacturers are responsible for ensuring safety and accurate labeling, but there is no pre-market review of efficacy. If you choose to try MSM for osteoarthritis symptoms, the reasonable approach is to do so under clinician guidance, with realistic expectations, and not as a replacement for interventions with stronger evidence.
Bottom line
MSM's evidence for joint pain is limited — most trials are small and short; it's not unreasonable to try for osteoarthritis symptoms under clinician guidance, but don't expect strong clinical support.
MSM for Exercise Recovery and Inflammation: What the Data Shows
Beyond joint pain, a newer area of MSM research focuses on exercise-induced muscle damage and delayed onset muscle soreness (DOMS). The idea is that MSM's sulfur content and potential antioxidant properties might reduce oxidative stress and inflammation after intense exercise.
A handful of small trials have explored this. One study in the Journal of the International Society of Sports Nutrition gave participants 3,000 mg of MSM daily for 30 days before a damaging bout of eccentric exercise and found reduced muscle soreness and lower blood markers of muscle damage compared to placebo. Another trial reported similar findings with a 50 mg per kg body weight dose. These results are interesting but preliminary — the total body of evidence is thin, and replication in larger, diverse populations is lacking.
MSM is sometimes marketed as supporting collagen synthesis because sulfur is a component of connective tissue. While sulfur is indeed necessary for collagen production, there is no direct evidence that MSM supplementation specifically enhances collagen synthesis in humans beyond what adequate protein intake already provides. The sulfur in methionine and cysteine from dietary protein is the body's primary source for these processes.
For exercise recovery, a sports medicine clinician would prioritize interventions with far stronger evidence: adequate total protein intake (1.6–2.2 g/kg/day), consistent sleep, proper hydration, and progressive training loads. Creatine monohydrate has robust evidence for strength and recovery. MSM sits far down the evidence hierarchy for this application.
Bottom line
A handful of small trials suggest MSM may reduce post-exercise soreness — interesting but not definitive; adequate protein, sleep, and progressive training still outperform any supplement for recovery.
Safety Profile: What Can Go Wrong With MSM Supplements
MSM is generally considered safe at the doses used in research, typically up to 4,000 to 6,000 mg per day for periods of several months. The most commonly reported side effects are gastrointestinal: nausea, diarrhea, bloating, and abdominal discomfort. These are usually mild and resolve when the supplement is stopped or taken with food.
A more clinically significant concern is MSM's potential mild anticoagulant effect. Some evidence suggests MSM may inhibit platelet aggregation, which means it could theoretically increase bleeding risk. This is particularly relevant for anyone taking warfarin, direct oral anticoagulants, or even regular high-dose NSAIDs. If you are on any blood-thinning medication, discuss MSM with your prescribing clinician before starting.
Allergic reactions, while uncommon, have been reported. These include skin rashes, itching, and swelling. Anyone experiencing signs of an allergic reaction should discontinue MSM and seek medical attention. There is also a persistent myth that MSM is derived from shellfish and therefore unsafe for people with shellfish allergies. Most commercial MSM is synthesized from DMSO, which is produced from wood pulp or petroleum sources — not shellfish. However, verifying the sourcing with the manufacturer is prudent if you have a severe allergy.
Long-term safety data beyond 12 months is sparse. The FDA does not require supplement manufacturers to conduct long-term safety studies, so the risk profile for multi-year daily use is unknown. Supplement quality is another variable: independent testing has found that some MSM products contain less active ingredient than labeled or are contaminated with heavy metals. Choosing products that undergo third-party testing (USP, NSF, or ConsumerLab) reduces this risk.
Bottom line
MSM has a reasonable short-term safety record, but people on blood thinners or with severe allergies should discuss with a clinician before use, and third-party tested products are preferable.
Better-Studied Alternatives for Joint and Inflammation Goals
If you are considering MSM for joint pain or inflammation, it is worth knowing what sits above it on the evidence hierarchy. For osteoarthritis specifically, the most effective intervention is weight management. Every pound of weight loss reduces knee joint loading by roughly four pounds during walking, making it the single highest-impact non-surgical intervention available.
Physical therapy and structured exercise — particularly low-impact activities like water aerobics, cycling, and strength training — have strong evidence for reducing pain and improving function in osteoarthritis. These interventions address the mechanical and muscular factors driving joint stress in ways that no supplement can replicate.
On the supplement side, omega-3 fatty acids (from fish oil or algae) have a broader and more consistent anti-inflammatory evidence base than MSM. The Mayo Clinic notes that glucosamine sulfate (not glucosamine hydrochloride) has better evidence for osteoarthritis than MSM, though even glucosamine's data is mixed. Curcumin from turmeric, particularly in bioavailable formulations, has shown promise for inflammatory joint pain in several meta-analyses.
For exercise-related inflammation and recovery, the evidence-based priorities are clear: adequate protein intake to support muscle repair, creatine monohydrate for strength and recovery, and sufficient sleep. These interventions have large, replicated bodies of evidence behind them. MSM may have a role as an adjunct for some individuals, but it should not displace these foundational strategies.
Bottom line
The evidence hierarchy for joint pain puts lifestyle interventions (weight management, exercise) and omega-3s above MSM; start there before adding less-evidenced supplements.
What most pages leave out
Most competitor pages write extensive 'symptoms of MSM deficiency' lists despite no such clinical entity existing. We must be explicit that MSM is not classified as an essential nutrient and there is no deficiency syndrome. The NCCIH 'limited and inconclusive' verdict on osteoarthritis evidence is the honest framing competitors avoid.
We flag this so you can make an informed choice — not to scare you off.
❓Frequently Asked Questions
There are no recognized symptoms of MSM deficiency because MSM is not an essential nutrient. 'Low MSM' is not a medical diagnosis, and no symptom set has been established for it.
No. The body has dietary sulfur needs, but these are met by protein-bound sulfur amino acids like methionine and cysteine, not by MSM specifically. You cannot be MSM-deficient any more than you can be deficient in a specific non-essential food compound.
MSM provides organic sulfur and may have mild anti-inflammatory and antioxidant effects. Its most-studied use is reducing joint pain in osteoarthritis, though the evidence for this is limited and inconclusive according to the National Center for Complementary and Integrative Health.
Garlic, onions, asparagus, coffee, tea, beer, and some raw animal foods contain trace amounts of MSM. These amounts are far below the doses used in research trials and are nutritionally insignificant.
Research trials have used doses ranging from 1,500 to 6,000 mg per day. You should discuss any supplement regimen with a clinician before starting, especially if you take blood thinners or have a shellfish allergy.
The NCCIH rates the evidence as limited and inconclusive. Some small trials show modest pain reduction for knee osteoarthritis, but high-quality, large-scale randomized controlled trials are lacking.
Yes. Reported side effects include nausea, diarrhea, bloating, headache, and allergic skin reactions. MSM may also mildly inhibit blood clotting, which is relevant for anyone on anticoagulant medications.
No. MSM (dimethylsulfone) is an oxidized metabolite of DMSO (dimethylsulfoxide). DMSO is an industrial solvent also used topically and medically, but they are related compounds, not the same substance.
Medically reviewed by
Chet Tharpe, MDBoard-certified physician
Last reviewed July 2026
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