What is MSM?
MSM (methylsulfonylmethane) is a compound that supplies sulfur, which your body needs. It's sometimes called 'dietary sulfur.'
Sulfur is a building material for cartilage, tendons, skin, hair, and nails. It's also used to make glutathione, the body's main antioxidant (a substance that protects cells from 'rusting').
The sulfur in your body is known to decline with age. MSM is used as a relatively safe way to top it back up.
MSM benefits: where it may help
- Joint pain and swelling: This is the main reason people use it. By calming inflammation signals, it may help ease pain and swelling in worn-down joints. Some people notice a difference fairly quickly during acute swelling and pain.
- Stiff shoulders and neck: It's popular for shoulders stiff from computer work and for upper back (trapezius) muscles that ache from inflammation for no clear reason.
- Cartilage building block: Sulfur is needed to firmly link cartilage components (chondroitin, collagen).
- Antioxidant: By raising glutathione, it helps your body handle oxidative stress (the body 'rusting').
- Hair, nails, and skin: Some people with nails that break easily or hair that's thinned after menopause notice improvement.
- Recovery after exercise: It's rated as 'possibly effective' for reducing muscle damage and soreness after exercise.
Who should take it
- □ Your knees, shoulders, or back are swollen and achy (especially if you're over 40)
- □ You have ongoing inflammatory pain with no clear cause
- □ You often have signs of inflammation like headaches, gum inflammation, or breakouts
- □ You've been taking painkillers or medicine for several chronic conditions for a long time
- □ You're eating very little because you're dieting
- □ Since menopause, your nails break easily and your hair has thinned
People in their 20s and 30s with joint pain can also take it to manage inflammation. Many people add it when a basic joint supplement isn't helping enough.
Who doesn't need it
- Healthy people with no particular aches: Many experts say there's no need to take it.
- Male pattern hair loss: It doesn't help. (This is different from the overall thinning some women experience.)
- People aiming to help varicose veins, circulation, or athletic performance: Studies found no effect.
- People who tend to run hot or break out after taking it: Sulfur can have a 'heating' effect on the body. Another anti-inflammatory like curcumin may suit you better.
- People who already have high liver enzymes: Please read the side effects section below first.
Best time to take MSM and daily dose
Bottom line: 2–3 g a day, split between after breakfast and after lunch. Start low.
| Goal | Daily dose |
|---|---|
| Getting started | 500 mg–1 g |
| General health | About 1.5 g |
| Joint pain (typical) | 2–3 g |
| Severe pain | Up to 3–6 g |
- Start with a small amount. Take 500 mg–1 g for about a week, and if you're fine, increase little by little.
- Take it after meals. On an empty stomach it may cause heartburn or discomfort.
- Take it at breakfast and lunch. Quite a few people have trouble sleeping when they take it in the evening.
- Split the dose. For 3 g, take one 1000 mg tablet 3 times a day, or one 1500 mg tablet at breakfast and lunch.
The powder tastes very bitter. Mixing it into a drink like orange juice makes it easier. Store the powder at room temperature, not in the fridge.
How to choose an MSM supplement: purity is key
MSM's purity (how clean it is) depends on how it's made.
| Method | What it's like | Verdict |
|---|---|---|
| Distillation | 99.8–99.9% pure. The best-known source is OptiMSM | Recommended |
| Crystallization | 60–70% pure, may contain more impurities | Avoid |
Check these 3 things on the label.
- OptiMSM — The most studied source. It also has GRAS (Generally Recognized as Safe) status from the US FDA.
- 99% purity or higher — 'Natural' (from trees) vs synthetic makes no difference because the molecule is the same. Purity matters more.
- Where the raw material comes from — Even if it says 'Made in USA,' the raw material may come from another country and just be packaged here.
Good combinations
| Combination | Goal |
|---|---|
| MSM + omega-3 | The most basic combo for managing joint inflammation |
| MSM + omega-3 + B vitamins (B12) | A combo for stiff shoulder and neck pain |
| MSM + curcumin | When you want extra support for joint and muscle inflammation |
| MSM + vitamin C + collagen | Skin elasticity and joint support |
| MSM + chondroitin and glucosamine | Adds cartilage components too |
| MSM + brewer's yeast | Hair and nails |
If your shoulder pain is severe, adding magnesium may help your muscles relax.
MSM side effects and cautions
Its toxicity is very low. But side effects happen more often than you might expect, so don't jump straight to a high dose.
| Symptom | What to do |
|---|---|
| Gas, bloating, diarrhea | The most common. Lower the dose and take it after meals |
| Breakouts, acne, lip irritation | Can appear 3–4 days in and get worse for about a week. May last about 2 weeks even after you stop |
| Trouble sleeping | Move evening doses to breakfast and lunch |
| Facial warmth, flushing, itching, hives | May be an allergic reaction. Stop taking it |
| Headache | Lower the dose or stop |
Liver enzymes: There are reports of liver enzymes rising after taking MSM. Most are temporary and come back down. Some experts think it's a case of 'high on the test only' rather than true liver damage, but real damage has also been reported. If you have high liver enzymes or liver disease, talk to your doctor before taking it, and if you had blood work while taking it, be sure to check the results.
Talk to your doctor first if
- You take blood thinners (antithrombotics)
- You're being treated for kidney disease (especially at high doses)
- You tend to run hot or have severe menopausal hot flashes
MSM is only a support tool. If your joints are severely painful or swollen, see a doctor first.
Medications and conditions to watch
- Caution Liver disease or high liver enzymes — Liver enzymes may rise further — talk to your doctor before taking
- Check Blood thinners (antithrombotics) — Possible interaction — talk to your doctor
- Check Kidney disease under treatment — Avoid high doses and talk to your doctor
Combinations
Works well with: Omega-3, Curcumin (Turmeric), Vitamin C, Collagen, B vitamins (B complex), Chondroitin, Glucosamine, Eggshell Membrane (NEM), Magnesium, Brewer's Yeast
Want it in one pill with others? Compare hair, skin and nails supplements → Compare joint supplements →
Frequently asked questions
When is the best time to take MSM?
After breakfast and lunch. Many people have trouble sleeping when they take it in the evening. It can upset an empty stomach, so always take it after a meal.
How many grams of MSM should I take a day?
Usually 2–3 g a day. Start with 500 mg–1 g to see how your body handles it, then increase. For severe pain, some people take up to 3–6 g.
I'm breaking out after taking MSM. Can I keep taking it?
If you're sensitive to sulfur, you may get breakouts or lip irritation. It's not a detox reaction; it's a sign MSM doesn't agree with you, so cut back or stop. It may last about 2 weeks even after you stop.
Can MSM raise liver enzymes?
There are reports of it. Most are temporary, but if your liver enzymes are already high or you have liver disease, talk to your doctor before taking it.
I have more gas since starting MSM.
It's the most common side effect. Try lowering the dose and splitting it after meals. If it still bothers you, stop.
What's the difference between OptiMSM and regular MSM?
OptiMSM is a 99.9% pure, distilled source and the most studied. MSM made by crystallization may be less pure. OptiMSM products are affordable in the US, so it's an easy choice.
Does MSM help with hair loss?
Some say it may help women whose hair has thinned after menopause. But it doesn't help male pattern hair loss.
How long does it take for MSM to work?
Some people notice it fairly quickly for acute swelling and pain. Everyone is different, so if it agrees with you, give it a few weeks of consistent use.
Related concerns
Last updated 2026-10-12