OptiMSM™: The World's Purest Sulfur for Hair, Skin, and Nails

November 1, 2021|Natalie Harrison

Updated: November 2025

We don't compromise on quality, neither should you.

That's why every capsule of KiriGlow contains OptiMSM™, the world's purest MSM (methylsulfonylmethane).

Here's the thing: when you're choosing a supplement, especially one designed to support hair, skin, and nails, the quality of each ingredient matters enormously. One premium ingredient can make the difference between a supplement that works and one that doesn't.

OptiMSM™ is that ingredient.

What Is MSM and Why Does It Matter?

MSM stands for methylsulfonylmethane, and it's one of the most underrated ingredients in the beauty and wellness space.

At its core, MSM is a sulfur-containing compound. But here's why that matters: sulfur isn't just another mineral, it's a fundamental building block of your body's structural proteins.

Specifically, sulfur is essential for:

Keratin production: Sulfur is a key component of keratin, the primary structural protein in your hair, nails, and skin's outer layer
Collagen synthesis: Sulfur supports the formation and cross-linking of collagen fibers, giving your skin its strength and elasticity
Cellular health: Sulfur participates in critical metabolic pathways that support healing, repair, and detoxification

MSM is 34% sulfur by weight, making it one of the richest natural sources of this essential element.

Without adequate sulfur, your body can't produce strong keratin or resilient collagen, no matter how much Functional Keratin™ you're supplementing with.

That's why OptiMSM™ is so important.

Why OptiMSM™ Is Different From Generic MSM

The supplement market is flooded with cheap MSM. Most of it is poorly sourced, inconsistently processed, and contaminated with impurities.

OptiMSM™ has spent 30 years setting the standard for MSM purity, quality, and safety.

Here's what makes OptiMSM™ premium:

99.9% Pure

OptiMSM™ is held to rigorous purity standards. Every batch is tested to ensure it's free of:

Harmful chemicals
Heavy metals
Biological contaminants
Impurities of any kind

This isn't marketing hype, it's measurable quality. When you take KiriGlow with OptiMSM™, you know exactly what you're getting.

Scientifically Researched and Proven

For three decades, OptiMSM™ has been the subject of clinical research across multiple categories:

Hair, skin, and nail health
Joint support and mobility
Muscle strength and recovery
Healthy aging
Healing and repair processes

This research foundation is why OptiMSM™ is trusted by premium brands worldwide.

"The Miracle Mineral"

OptiMSM™ earned the nickname "The Miracle Mineral" because of its comprehensive benefits across so many body systems. It's not a exaggeration, it's a recognition of how foundational sulfur is to human health.

Registered Trademark by Bergstrom Nutrition

OptiMSM™ is a registered trademark of Bergstrom Nutrition, Inc., a company with decades of expertise in nutritional ingredient sourcing and quality control. This means when you see OptiMSM™ on a label, you're getting the genuine, premium version, not a cheap imitation.

How OptiMSM™ Works Synergistically With Functional Keratin™

This is where it gets interesting.

When you take KiriGlow, you're getting:

Functional Keratin™: 91% homologous to human keratin, the building block your body needs for hair, skin, and nail strength
OptiMSM™: 34% pure sulfur, the essential element your body needs to construct and cross-link keratin and collagen fibers

Together, they're not just complementary, they're synergistic.

Functional Keratin™ provides the amino acid building blocks. OptiMSM™ provides the sulfur cross-links that hold those blocks together into strong, resilient structures.

Think of it like building a house:

Functional Keratin™ is the bricks
OptiMSM™ is the mortar that binds them together

Without the bricks, you have no structure. Without the mortar, the bricks don't hold together. You need both.

This is why we included OptiMSM™ in KiriGlow from the beginning. It's not a filler ingredient, it's fundamental to the formula's effectiveness.

The Science: How Sulfur Supports Keratin and Collagen

Keratin and collagen proteins are constructed from amino acid chains, but their strength comes from the bonds between these chains.

The strongest of these bonds are disulfide bonds, which form between cysteine amino acids. These disulfide bonds create cystine, the structure that gives keratin its legendary strength and stability.

Here's the critical part: disulfide bonds require sulfur to form.

When you supplement with OptiMSM™, you're providing your body with the sulfur it needs to:

Form strong disulfide bonds between keratin proteins
Cross-link collagen fibers for skin elasticity and firmness
Support ongoing cellular repair and maintenance
Enhance the body's natural healing processes

Without adequate sulfur, your body can still produce keratin and collagen, but they'll be weak and structurally compromised.

With OptiMSM™, your body can produce keratin and collagen that's strong, resilient, and truly functional.

What OptiMSM™ Does for Your Hair, Skin, and Nails

When you commit to daily supplementation with KiriGlow, OptiMSM™ supports:

Hair Strength and Growth

OptiMSM™ provides the sulfur your body needs to produce stronger keratin for hair shafts. Hair becomes less prone to breakage, split ends heal, and new hair grows in thicker and glossier.

Most people notice improvements in hair texture and strength within 3-6 months.

Skin Elasticity and Radiance

Collagen cross-linking requires sulfur. OptiMSM™ ensures your body has the sulfur it needs to produce resilient, elastic collagen fibers. Your skin becomes firmer, more hydrated, and more radiant.

Fine lines soften, and overall skin texture improves visibly.

Nail Strength and Growth

Nails are almost entirely keratin. By providing the sulfur your body needs to produce strong keratin, OptiMSM™ supports faster nail growth, increased hardness, and flexibility without brittleness.

Ridges fade, nails break less frequently, and growth becomes noticeably faster.

Bonus: Joint and Muscle Support

OptiMSM™ isn't just for beauty. Sulfur is essential for connective tissue throughout your body. Regular supplementation with OptiMSM™ supports:

Joint flexibility and mobility
Muscle strength and recovery
Overall connective tissue integrity

This is a bonus benefit many customers experience: not just better hair, skin, and nails, but also improved joint comfort and energy levels.

How OptiMSM™ Fits Into the KiriGlow Formula

KiriGlow is specifically formulated to maximize keratin and collagen production and strength:

Functional Keratin™ (91% homologous to human keratin)

Provides the amino acid building blocks
Triggers collagen 4 and 7 expression
Rich in cysteine for glutathione production

Marine Collagen with Elastin Peptides

Provides bioavailable collagen
Supports skin elasticity and joint health
Works synergistically with keratin

OptiMSM™ (99.9% pure)

Provides essential sulfur for disulfide bond formation
Supports keratin and collagen cross-linking
Enhances connective tissue integrity

Biotin

Supports keratin synthesis
Essential for hair, skin, and nail health

Zinc

Cofactor for collagen synthesis
Supports immune function

Vitamin C

Essential for collagen cross-linking
Powerful antioxidant

Collactive® Marine Collagen

Clinically researched marine collagen
Highly bioavailable

Together, these ingredients create a comprehensive system that supports your body's production of strong, healthy keratin and collagen from the inside out.

OptiMSM™ isn't just another ingredient, it's the connector that ties everything together.

Why Quality Matters: OptiMSM™ vs. Generic MSM

Here's what separates OptiMSM™ from cheap MSM:

OptiMSM™

99.9% pure
30 years of purity and safety research
Tested for heavy metals, chemicals, contaminants
Registered trademark, genuinely sourced
Clinically proven effectiveness
Premium price reflects premium quality

Generic MSM

Variable purity (often 90-95%)
Minimal safety testing
Potential contamination with impurities
Inconsistent sourcing
Unproven or limited research
Cheap price reflects cheap quality

The difference might seem small on paper, but in your body, it's massive.

When you're supplementing daily for 3-6 months, you're putting thousands of dollars' worth of OptiMSM™ into your body. Choosing generic to save a few dollars is false economy.

Choose OptiMSM™. Your hair, skin, nails, and joints will thank you.

How to Maximize OptiMSM™ Benefits

To get the most from OptiMSM™ in KiriGlow, follow these guidelines:

1. Take It Consistently

OptiMSM™ benefits accumulate over time. Take KiriGlow daily, without gaps. Most people notice visible improvements by 3-6 months with consistent use.

2. Support With Sulfur-Rich Foods

In addition to supplementing with OptiMSM™, eat foods rich in sulfur and sulfur-containing amino acids:

Garlic and onions (sulfur-rich)
Cruciferous vegetables, broccoli, cauliflower (glucosinolates convert to sulfur compounds)
Eggs (cysteine and methionine, sulfur-containing amino acids)
Poultry and fish (protein and sulfur-containing amino acids)

3. Stay Hydrated

Sulfur needs water to work effectively in your body. Drink plenty of water throughout the day.

4. Support With Topical Care

While you're feeding your body from the inside with OptiMSM™, support your hair, skin, and nails from the outside with gentle, nutrient-rich products like Kiri10's Triple-Keratin Complex Haircare.

5. Manage Stress and Prioritize Sleep

Stress depletes sulfur and other essential nutrients. Prioritize sleep, movement, and stress management practices that work for you.

6. Protect From Environmental Damage

Limit heat styling, chemical treatments, and UV exposure to protect the keratin and collagen your body is building with OptiMSM™.

OptiMSM™ for Different Life Stages

Postpartum

Pregnancy and postpartum hormonal changes deplete sulfur and keratin. OptiMSM™ in KiriGlow accelerates hair recovery and rebuilds nail and skin strength during this challenging time.

Aging

As you age, your body's ability to synthesize keratin and collagen declines. OptiMSM™ supports your body's ongoing production of these essential proteins, helping you maintain hair, skin, and joint health.

High Stress

Stress rapidly depletes sulfur reserves. People under significant stress often notice hair loss, skin issues, and joint discomfort. OptiMSM™ replenishes what stress takes away.

Active Lifestyle

If you exercise regularly or play sports, your body needs extra sulfur for muscle recovery and joint support. OptiMSM™ supports recovery and mobility.

Recovery From Illness or Surgery

Healing requires sulfur. OptiMSM™ supports the body's natural healing processes after illness or surgical recovery.

The Bottom Line: OptiMSM™ Is Essential, Not Optional

When you choose KiriGlow, you're getting a premium formula powered by premium OptiMSM™.

We could have used cheap, generic MSM to increase our profit margins. We didn't.

We could have reduced the OptiMSM™ dosage to save on costs. We didn't.

We believe in quality over shortcuts. We believe you deserve the same.

OptiMSM™ is the "miracle mineral" for a reason. It's essential for every step of keratin and collagen production and strength. It's been proven safe and effective for 30 years. It's held to the highest purity standards in the industry.

When you're investing in your hair, skin, nails, and overall health through supplementation, don't settle for generic. Choose OptiMSM™.

Your future self will thank you.

Explore KiriGlow powered by OptiMSM™, or learn more about how Functional Keratin™ and marine collagen work together.

References and Further Reading

Scientific Research on MSM and OptiMSM™

MSM Structure and Function

MSM (Methylsulfonylmethane) and Sulfur's Role in Connective Tissue - National Institutes of Health (NIH)
Sulfur's Role in Collagen and Keratin Synthesis - Journal of Cosmetic Dermatology

OptiMSM™ Clinical Research

OptiMSM™: 30 Years of Purity and Safety Research - Bergstrom Nutrition, Inc.
Methylsulfonylmethane (MSM) for Hair, Skin, and Joint Health - Clinical Trial Results
MSM and Collagen Cross-Linking - International Journal of Biological Macromolecules

Disulfide Bonds and Protein Structure

Disulfide Bonds in Protein Structure and Function - Biochemistry and Molecular Biology Education
Cysteine, Cystine, and Keratin Strength - International Journal of Trichology

Related Kiri10 Resources

Product Information

Related Blog Articles

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Frequently Asked Questions

MSM (methylsulfonylmethane) is a sulfur-containing compound that's 34% sulfur by weight. Sulfur is a fundamental building block for keratin and collagen, the structural proteins that make up your hair, skin, and nails. Without adequate sulfur, your body can't produce strong, resilient keratin and collagen, no matter how many other supplements you take. OptiMSM™ provides the essential sulfur your body needs to construct strong protein structures.

OptiMSM™ is 99.9% pure and has spent 30 years setting the standard for MSM quality, purity, and safety. Generic MSM often contains impurities, heavy metals, and harmful chemicals. OptiMSM™ is tested rigorously to ensure it's free of contamination. When you're supplementing daily, choosing premium OptiMSM™ over generic MSM ensures you're getting genuine, high-quality material, not compromised alternatives.

Functional Keratin™ provides the amino acid building blocks for keratin and collagen. OptiMSM™ provides the sulfur necessary to form strong disulfide bonds between these amino acids. Together, they create strong, resilient keratin and collagen structures. Without OptiMSM™, Functional Keratin™ alone can't produce the strongest possible results. This synergy is why both are essential in KiriGlow.

Disulfide bonds are the chemical links between cysteine amino acids in keratin and collagen proteins. These bonds create cystine, the structure that gives keratin its legendary strength. Sulfur is essential for forming these bonds. Without adequate sulfur from OptiMSM™, your keratin and collagen will be weaker, more fragile, and prone to breakage. With OptiMSM™, your body can produce strong, resilient structures.

Most people notice initial improvements (less shedding, stronger nails) within 3 months of consistent daily use. Visible transformation in hair thickness, skin texture, and nail growth typically appears by 3-6 months. The most dramatic results occur after 6 months onwards. Consistency matters more than speed. Remember, hair and nails grow on cycles that span months, so patience is essential.

MSM is a naturally occurring compound found in foods and throughout the body. Supplementing with OptiMSM™ is generally considered safe during pregnancy and breastfeeding, but we always recommend consulting your healthcare provider before starting any new supplement during these sensitive periods, safety first always.

OptiMSM™ has an excellent safety profile with minimal reported side effects. Some people experience mild detoxification symptoms (headaches, digestive changes) when first starting MSM supplementation, as the body detoxifies. These typically subside within a few days. If you have concerns, consult your healthcare provider before starting.

While sulfur-rich foods (garlic, onions, cruciferous vegetables, eggs) support sulfur intake, it's difficult to get the concentrated amount of bioavailable sulfur from diet alone, especially if you're experiencing hair loss, aging, stress, or rapid changes in your body. Supplementing with OptiMSM™ provides direct, measurable sulfur support alongside dietary sources.

Connective tissue throughout your body, including joints, cartilage, and tendons, is made primarily of collagen and keratin-like proteins. These structures require sulfur to maintain strength and flexibility. OptiMSM™ supports collagen synthesis and cross-linking in connective tissue, improving joint mobility, reducing discomfort, and supporting muscle recovery. This is a bonus benefit many KiriGlow customers experience.

Hair and nail growth are continuous cycles. Your body produces new hair and nails regularly as old ones shed naturally. When you stop supplementing with OptiMSM™ and Functional Keratin™, you stop providing the building materials and sulfur your body needs for strong new growth. Existing strengthened hair and nails won't immediately revert, but new growth will gradually become weaker over weeks to months. Consistent use maintains consistent results.