MSM Powder — OptiMSM® 99.9% Pure Organic Sulfur Supplement
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Greenway Biotech · Made in California since 1989
OptiMSM® organic sulfur.
99.9% pure, body-weight dosed.
Pharmaceutical-grade methylsulfonylmethane (MSM) — the only GRAS-designated MSM ingredient, produced by Bergstrom Nutrition via a proprietary distillation process to 99.9% purity. Packaged in Madera, California and third-party tested. Powder form means flexible dosing by body weight and a lower cost per gram than capsules.
Find your size → See how to use itShips from California · 90-day guarantee · Supplement Facts on every bag
99.9%
Pure OptiMSM®
~34%
Elemental sulfur by weight
3sizes
1, 2, and 4 lb bags
35+yrs
Family-owned in California
01 / Choose your size
Right-sized for your routine.
Durations below assume a daily dose of about 6 g (a common amount for a 150 lb adult, split into two servings). Your actual dose depends on body weight — see the Dosage Guide.
| Size | Typical Duration | Servings per Bag | Best For |
|---|---|---|---|
| 1 lb | ~2.5 months at 6 g/day | ~75 days of daily use | Best starter size |
| 2 lb | ~5 months at 6 g/day | ~150 days of daily use | Established routines |
| 4 lb | ~10 months at 6 g/day | ~300 days of daily use | Best value |
| Product Type | Oral dietary supplement — organic sulfur (MSM) powder; also usable topically |
|---|---|
| Active Compound | Methylsulfonylmethane (MSM) — (CH₃)₂SO₂ |
| Brand | OptiMSM® by Bergstrom Nutrition |
| Purity | 99.9% pure MSM |
| Sulfur Content | ~34% elemental sulfur by weight |
| Grade | Dietary supplement grade — suitable for oral use |
| Regulatory | GRAS designation backed by an FDA letter of no objection (since 2008) |
| Free From | No fillers, binders, anti-caking agents, or flow agents |
| Vegan | Yes — OptiMSM® is vegan, non-GMO, gluten-free, and allergen-free |
| Sizes Available | 1 lb, 2 lb, 4 lb resealable bags |
| Testing | Independently tested for heavy metals; results consistently well below required limits |
| Safety | Consult a healthcare provider before use if pregnant, nursing, or taking medications |
02 / Ideal for
One organic sulfur.
Many routines.
A versatile sulfur supplement many people add to daily wellness routines. These are common reasons shoppers choose MSM — not medical claims.
Joint & Connective Tissue
One of the most common reasons people supplement with MSM — sulfur is a building block of the connective tissue throughout the body. Studied for joint and connective-tissue support.
Skin, Hair & Nails
Sulfur is a component of collagen and keratin — the structural proteins in skin, hair, and nails. A popular addition to beauty-from-within routines.
Antioxidant Pathways
MSM is studied for its role in supporting the body's natural production of glutathione, an endogenous antioxidant. Many shoppers incorporate it for this reason.
Active Recovery
Popular among active people as part of a post-exercise routine. Research has examined MSM in the context of exercise recovery and oxidative stress.
Seasonal Wellness
Some research has looked at MSM and the body's response to seasonal environmental allergens. A common part of seasonal wellness routines.
Flexible Dosing
Powder lets you dose precisely by body weight and adjust as needed — more practical than capsules for anyone taking 3 g or more per day.
03 / Why this one
Not all MSM
is the same.
The MSM market varies widely in purity and provenance. A few attributes set OptiMSM® apart from generic recrystallized material.
GRAS
The only GRAS-designated MSM ingredient.
OptiMSM® is the only MSM to hold a GRAS (Generally Recognized As Safe) designation, backed by an FDA letter of no objection since 2008 and supported by extensive safety research including long-term human clinical studies. To be precise about what this means: the manufacturer self-affirmed GRAS status through expert review and notified the FDA, which responded with a letter of no objection.
99.9
99.9% pure, by distillation.
OptiMSM® is produced through a proprietary multi-stage distillation process that achieves 99.9% purity — rather than the recrystallization methods that can leave trace impurities in lower-grade MSM. Every batch we receive is third-party tested for identity and purity.
⚗️
~34% elemental sulfur.
MSM is approximately 34% elemental sulfur by weight, making it one of the most concentrated organic sulfur sources available as a dietary supplement. Sulfur is a component of collagen, keratin, and the body's antioxidant pathways.
🌱
Vegan, non-GMO, allergen-free.
OptiMSM® is vegan, non-GMO Project Verified, gluten-free, allergen-free, and non-shellfish-derived. A clean fit for a wide range of dietary needs, with no animal-derived inputs at any stage.
✨
Nothing but MSM.
No fillers, binders, anti-caking agents, or flow agents — just 99.9% pure methylsulfonylmethane powder. The same powder works for oral supplementation and for mixing into a simple topical solution.
🇺🇸
Packaged in Madera, California.
Repackaged in our family-operated FDA-registered facility in Madera under strict quality-control protocols — the same facility that handles our full line of fertilizer and wellness products.
04 / The science
What MSM is, and what "GRAS" actually means.
~34% sulfur
Methylsulfonylmethane, (CH₃)₂SO₂
MSM — methylsulfonylmethane — is a naturally occurring organic sulfur compound found in all vertebrates, including humans, and present in small amounts in fresh fruits, vegetables, grains, and animal products. Much of the dietary MSM in food is lost during cooking, processing, and storage, which is why supplementation is commonly used to restore intake.
Despite often being described simply as a "sulfur supplement," MSM does more than donate sulfur. It supports sulfur metabolism and helps the body incorporate sulfur into proteins, connective tissue, and antioxidant pathways. Roughly 34% of its molecular weight is elemental sulfur — a high proportion among supplemental sulfur sources.
On the regulatory side, it is worth being precise. GRAS stands for "Generally Recognized As Safe." The FDA does not "approve" or "designate" GRAS status; rather, a manufacturer self-affirms GRAS through qualified expert review and may notify the FDA, which can respond with a letter of no objection. OptiMSM® holds that status — it has had GRAS designation backed by an FDA letter of no objection since 2008, and is the only MSM ingredient to do so.
For a deeper look at the research, see The Complete Guide to MSM Powder: Benefits, Usage, and Safety.
Key Ingredient
One ingredient. That is the entire product.
OptiMSM® Methylsulfonylmethane ((CH₃)₂SO₂)
The only ingredient. 99.9% pure, distillation-produced, vegan, ~34% elemental sulfur by weight. No fillers or flow agents. Manufactured by Bergstrom Nutrition.
Allergen note: OptiMSM® is gluten-free, allergen-free, and non-shellfish-derived. If you are sensitive to sulfa drugs, note that MSM is a structurally distinct organic sulfur compound and no allergic cross-reactivity has been identified in research — but consult your healthcare provider if you are uncertain.
Technical Snapshot
| Active Compound | Methylsulfonylmethane (MSM) |
|---|---|
| Chemical Formula | (CH₃)₂SO₂ |
| Brand | OptiMSM® by Bergstrom Nutrition |
| Purity | 99.9% pure MSM |
| Sulfur Content | ~34% elemental sulfur by weight |
| Manufacturing | Proprietary multi-stage distillation |
| Grade | Dietary supplement grade |
| Regulatory | GRAS designation with FDA letter of no objection (2008) |
| Form | Fine white crystalline powder |
| Taste | Mildly bitter — dissolve in water with honey or maple syrup |
| Certifications | Vegan, non-GMO Project Verified, gluten-free, Kosher, Halal |
| Sizes | 1 lb, 2 lb, 4 lb resealable bags |
| Packaged At | Greenway Biotech facility, Madera, California |
| Testing | Third-party lab tested; heavy metal screened |
What to Expect
First use: MSM powder has a mildly bitter, slightly sulfurous taste. Most shoppers dissolve it in water or juice with a little honey or maple syrup, or load it into empty capsules. Starting at a lower dose for the first week is the gentlest approach.
Week 1-2: Some new users notice mild, temporary digestive changes when starting — these usually settle as the body adjusts. A gradual ramp over 2-3 weeks tends to be the smoothest.
Week 4-8: MSM is a consistency supplement. Many shoppers report noticing a difference only after 4-8 weeks of steady daily use. Individual experience varies.
05 / How to use
Measure.
Mix.
Split the dose.
Three ways to take MSM powder. Always follow the directions and Supplement Facts on your bag. See the Dosage Guide band for body-weight amounts.
Oral — Dissolved in Water
Quick answer: Dissolve your body-weight dose in 8-12 oz of distilled or filtered water, split into a morning and an afternoon serving.
- Measure your dose using the body-weight guide in the Dosage band below.
- Dissolve the powder in 8-12 oz of distilled or filtered water. Avoid chlorinated tap water — chlorine may interfere with sulfur uptake.
- Add a little honey, maple syrup, or coconut sugar to offset the mild bitterness, if you like.
- Split your daily total into two equal servings — one morning, one afternoon or early evening — for steadier intake through the day.
- May be taken with or between meals. Some shoppers find it easier on the stomach with food.
Tip: Start low and build gradually — 1-2 g per day for the first week, increasing to your full body-weight dose over 2-3 weeks. A gradual ramp reduces the mild temporary digestive changes some new users notice when starting at a full dose.
Loaded Into Capsules
Quick answer: Fill size 00 capsules (~0.5-0.7 g each); a 3 g serving is about 5-6 capsules.
- Buy size 00 empty gelatin or vegetarian capsules (widely available online and at health-food stores).
- Use a capsule-filling tray for speed, or fill by hand.
- A size 00 capsule holds roughly 0.5-0.7 g of MSM powder.
- For a 3 g serving, fill about 5-6 capsules. Adjust to your body-weight dose.
Tip: Capsule-loading is the usual workaround for anyone who finds the taste difficult. It trades a little prep time for no taste at all.
Simple Topical Solution
Quick answer: Mix a small amount of powder into a carrier lotion, aloe gel, or distilled water; patch test first.
- Mix a small amount of MSM powder into a carrier lotion, aloe vera gel, or distilled water to make a simple topical solution.
- Patch test on a small area of skin before broader use.
- Apply to the target area and allow to absorb.
- Discontinue if irritation develops.
Tip: MSM is also used as a cosmetic ingredient. A simple DIY topical is an easy way to add it to a skin routine — start with a low concentration.
06 / Dosage & timing
Dose by body weight.
Split it in two.
Stay consistent.
There is no established RDA for MSM. Research and common practice suggest 1.5-6 g per day for healthy adults. Always follow the Supplement Facts on your bag.
Body-Weight Dosage Reference
Based on the OptiMSM® body-weight approach. Always follow the Supplement Facts on your bag.
| Body Weight | Daily Dose | Per Serving (÷2) | Approx. Measure |
|---|---|---|---|
| 100 lbs (45 kg) | 4 g | 2 g | ½ tsp per serving |
| 125 lbs (57 kg) | 5 g | 2.5 g | ⅝ tsp per serving |
| 150 lbs (68 kg) | 6 g | 3 g | ¾ tsp per serving |
| 175 lbs (79 kg) | 7 g | 3.5 g | ~⅞ tsp per serving |
| 200 lbs (91 kg) | 8 g | 4 g | 1 tsp per serving |
-
01
Split into two servings.
Morning and afternoon/evening. Splitting is associated with steadier sulfur availability and better overall absorption than a single large dose.
-
02
With or without food.
MSM can be taken on an empty stomach or with meals. Some shoppers find it gentler on the stomach with food.
-
03
Mind the evening dose.
MSM's role in energy metabolism means some people notice a mild stimulating effect. If that happens, move the second serving to mid-afternoon.
-
04
Use clean water.
Dissolve in distilled, filtered, or RO water. Chlorine in tap water may interfere with sulfur uptake — the same guidance applies to other mineral supplements.
Measuring & Upper Range
One level teaspoon of MSM powder weighs about 4 g — use a digital kitchen scale for doses between teaspoon marks. Studies examining MSM up to 9 g per day in healthy adults have reported a favorable safety profile. Mild intestinal discomfort, loose stools, or temporary headache are most associated with higher doses or rapid escalation, and usually resolve as the body adjusts. If they persist, reduce the dose and ramp more slowly.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
07 / Compare
Powder
or capsules?
Both deliver the same active compound — methylsulfonylmethane. The difference is convenience, flexibility, and cost.
| Factor | MSM Powder (this product) | MSM Capsules | Best For |
|---|---|---|---|
| Dose flexibility | Fully adjustable by body weight | Fixed per capsule (500-1,000 mg) | Body-weight dosing |
| Cost per gram | Lower — more economical at scale | Higher — includes encapsulation cost | Daily long-term use |
| Higher doses (4-8 g/day) | Easy — one or two servings | Requires 6-16 capsules | Higher daily amounts |
| Ease of use | Requires measuring and mixing | No preparation needed | Convenience |
| Taste | Mildly bitter — maskable | No taste — encapsulated | Taste-sensitive users |
| Topical use | Mix into lotion or gel directly | Must open and empty capsule | DIY topical |
| Travel | Bulk bag is less portable | Pre-counted, easy to carry | On-the-go dosing |
08 / Decision
Is the powder
the right format for you?
A short fit-check so you can decide quickly.
A Great Fit If You
- Want flexible dosing adjustable by body weight
- Need higher daily amounts (3 g or more) and want to avoid swallowing many capsules
- Are comfortable dissolving powder in water or juice
- Want the most economical per-gram cost
- Want OptiMSM® specifically — the only GRAS-designated MSM ingredient
- Intend to use it both orally and topically
Consider Another Option If
- You need pre-measured doses for travel — capsules are more portable
- You strongly dislike any bitterness and cannot mask it — capsules avoid the taste entirely
- You want a topical magnesium routine instead — see Magnesium Oil Spray or Magnesium Cream
- You are pregnant, nursing, or on blood-thinning medication — consult your healthcare provider before choosing any MSM product
09 / Build the routine
MSM for sulfur.
These complete the routine.
Many shoppers pair MSM with magnesium for a broader mineral-and-sulfur wellness routine.
Oral & Topical
Magnesium Chloride USP
Dead Sea USP magnesium chloride powder — use as an oral magnesium supplement or to make DIY magnesium oil. Pairs well with MSM for mineral-and-sulfur support.
TopicalMagnesium Oil Spray
Ready-to-use Dead Sea magnesium chloride spray. Many shoppers pair oral MSM with topical magnesium for a complementary routine.
Bath SoakEpsom Salt (Magnesium Sulfate)
USP-grade magnesium sulfate for relaxing bath soaks. A natural pairing with MSM for those focused on muscle comfort and post-activity routines.
SkincareMagnesium Cream
Ready-to-use topical magnesium cream for targeted application. A convenient complement to a daily MSM routine.
10 / Safety & handling
Read this before
you start.
A short safety summary. Keep out of reach of children. Always follow the Supplement Facts on your bag.
- Consult your healthcare provider before use if you are pregnant or breastfeeding (sufficient safety data in these groups is not available), take blood-thinning medication such as warfarin, have kidney disease or impaired kidney function, or take other prescription medications.
- Sulfa-drug sensitivity: MSM is a structurally distinct organic sulfur compound, and no allergic cross-reactivity with sulfa drugs has been identified in research. Consult your provider if you are uncertain.
- Start low, build gradually. Mild intestinal discomfort, loose stools, or temporary headache are most associated with higher doses or rapid escalation, and usually resolve as the body adjusts. If they persist, reduce the dose.
- Handling: avoid inhaling fine powder dust when measuring large amounts. Wash hands after measuring if preparing topical solutions.
- Storage: store in a cool, dry place out of direct sunlight and humidity; keep the bag sealed or in an airtight container (MSM may clump if exposed to moisture). No refrigeration needed.
- First aid: for eye contact, flush with clean water for 15 minutes and seek medical attention if irritation persists. For excessive ingestion, contact Poison Control (1-800-222-1222); do not induce vomiting. For dust inhalation, move to fresh air.
11 / FAQ
Common questions.
Honest answers.
If your question is not here, contact our team at questions@greenwaybiotech.com.
What is OptiMSM® and why does it matter?
OptiMSM® is a branded form of methylsulfonylmethane manufactured by Bergstrom Nutrition using a proprietary multi-stage distillation process to 99.9% purity. It is the only MSM ingredient to hold a GRAS (Generally Recognized As Safe) designation, backed by an FDA letter of no objection since 2008 and supported by extensive safety research. Not all MSM is made to this standard — recrystallized products may retain trace impurities. Greenway Biotech carries OptiMSM® exclusively.
What does "GRAS" actually mean here?
GRAS stands for Generally Recognized As Safe. The FDA does not "approve" or "designate" GRAS status. A manufacturer self-affirms it through qualified expert review of the safety data and may notify the FDA, which can respond with a letter of no objection. OptiMSM® holds that status — GRAS designation backed by an FDA letter of no objection since 2008. It means the ingredient's safety is well supported; it is a safety designation only, and says nothing about any medical condition.
How much MSM should I take per day?
A widely used starting point is about 4 grams per 100 pounds of body weight per day, split into two equal servings. Someone around 150 pounds would typically take about 6 grams daily — 3 grams morning and 3 grams afternoon. Research suggests effective amounts generally fall between 1.5 and 6 grams per day for healthy adults. See the Dosage Guide band above, and consult your healthcare provider for personalized guidance. More detail in The Complete Guide to MSM Powder.
Why take MSM twice a day?
Splitting the daily dose into two servings helps maintain steadier sulfur levels through the day. The digestive system absorbs a finite amount at once, so spacing intake makes more of the MSM usable rather than excreted. Once-daily dosing is common among those who find splitting inconvenient, but twice-daily is generally considered the more effective pattern based on absorption dynamics.
Why distilled or filtered water instead of tap water?
Chlorine in municipal tap water may interfere with sulfur uptake. Using distilled, filtered, or reverse-osmosis water removes chlorine and other potential disruptors. This is a widely cited recommendation among MSM users and is consistent with guidance for other mineral supplements.
What does MSM taste like, and how do I make it easier to take?
MSM powder has a mildly bitter, slightly sulfurous taste that most people find easy to mask. Common approaches: dissolve it in fresh juice, add raw honey, maple syrup, or coconut sugar, or blend it into a smoothie. If you cannot tolerate any bitterness, load the powder into empty size 00 capsules — each holds about 0.5-0.7 grams, so a 3 g serving is roughly 5-6 capsules.
What are the most common reasons people take MSM?
MSM is one of the most widely used dietary sulfur supplements. Common reasons shoppers cite include joint and connective-tissue support, skin and hair support through collagen and keratin, post-exercise comfort, and support for the body's antioxidant pathways via glutathione. These are general reasons for use, not medical claims. Explore 4 Benefits of MSM and How MSM Supports Your Immune System.
Can MSM help with seasonal allergies?
Some research has examined MSM and the body's response to seasonal environmental allergens, possibly through its role in inflammatory pathways. Many people include MSM in a seasonal wellness routine. This is an area of ongoing study, not a treatment claim. Read more: Can MSM Help With Seasonal Allergies?
Is MSM safe to take long-term?
OptiMSM® is the most extensively studied form of MSM and has a favorable safety record in human trials, with studies examining doses up to 9 grams per day without identifying serious adverse effects. As with any supplement, consult your healthcare provider if you have existing health conditions, take prescription medications, or are pregnant or breastfeeding.
Is this product vegan?
Yes. OptiMSM® is vegan, non-GMO Project Verified, gluten-free, allergen-free, and non-shellfish-derived. The powder is the single ingredient with no animal-derived inputs. (If you load it into capsules yourself, choose vegetarian capsules rather than gelatin to keep the routine vegan.)
Who should consult a doctor before taking MSM?
Speak with your healthcare provider before starting MSM if you are pregnant or breastfeeding, take blood-thinning medication such as warfarin, have kidney disease or impaired kidney function, or are uncertain about interactions with existing prescriptions. No formal drug interactions have been documented in research, but personalized guidance is always the prudent approach.
Ready to start?
Pick your size. We'll ship it.
Available in 1 lb, 2 lb, and 4 lb resealable bags. Ships from our family-operated facility in Madera, California. Backed by our 90-day money-back guarantee — if it is not the right fit, we will make it right.
Choose your size →Ships from California · 90-day guarantee · Supplement Facts on every bag