Best Methylene Blue Supplement: What to Look for When the Quality Actually Matters

The short answer. There is no single best methylene blue supplement, and any article that names one is guessing on your behalf, because suppliers and lot quality change faster than a ranking can stay honest. What separates a product worth buying from one that is not comes down to three things you can check yourself in about five minutes: the grade is named explicitly as USP or pharmaceutical, a batch-specific certificate of analysis is published with a lot number matching the bottle, and that certificate reports lead, arsenic, cadmium and mercury individually against a stated limit. A product that fails any of those three is not worth considering, whatever else it gets right. The checklist further down this page is the whole method.

Type "best methylene blue supplement" into any search engine and you'll get a chaotic mix of results: fish tank treatments, nootropic capsules, liquid tinctures from compounding pharmacies, and skincare formulations. The confusion isn't your fault. Methylene blue exists in multiple forms across completely different markets, and the quality variance is staggering.

The stakes are higher than with most supplements. Unlike buying subpar vitamin C (where you mostly waste money), choosing the wrong methylene blue product means potentially ingesting industrial-grade chemicals or applying contaminated solutions to your skin. Let's cut through the marketing and focus on what actually separates safe, effective products from everything else.

The Purity Problem Nobody Wants to Discuss

Methylene blue's availability across multiple industries creates a dangerous gray market. The same chemical formula serves as a laboratory reagent, aquarium medication, textile dye, and pharmaceutical. But purity levels range from 60% (technical grade) to 99%+ (USP pharmaceutical grade). That remaining percentage? Heavy metals, manufacturing byproducts, and contaminants you definitely don't want in or on your body.

USP (United States Pharmacopeia) grade is the standard to look for if a product is intended for human use. The designation means the material has been tested against a pharmacopoeial monograph: identity, assay, and named impurity limits, including elemental impurities, set on the assumption that a person will take it. An industrial or laboratory grade is not held to those limits, because it was never meant to be swallowed.

One thing this page used to claim and no longer does. An earlier version of this article cited a 2019 analysis in the Journal of Pharmaceutical Sciences reporting that non-pharmaceutical methylene blue products often contained lead and arsenic above safety thresholds. We went looking for that paper and could not find it. No such analysis appears in that journal, and we could not find a published study of any kind measuring heavy metal contamination across consumer methylene blue products. The claim is removed.

That absence is worth knowing rather than glossing over, because it cuts both ways. There is no published survey showing industrial-grade methylene blue is widely contaminated, and there is no published survey showing it is clean either. Nobody has measured it. What remains true is the part that does not need a study: a grade that sets no limit on lead or arsenic for human intake tells you nothing about whether lead or arsenic is present. That is the reason to ask for a batch certificate with individual elemental results, and it is a stronger reason than a contamination statistic would have been.

When evaluating any methylene blue product, demand to see a Certificate of Analysis (COA) from a third-party laboratory. This document should confirm purity percentage and test results for heavy metal contamination. If a supplier can't provide this immediately, assume their product isn't suitable for human use regardless of how it's marketed.

USP grade vs reagent grade: what each label actually certifies

The single most useful thing to understand is that these grades are not points on one quality scale. They certify different things, for different buyers. A grade can be entirely honest and still be the wrong grade for a person.

Grade on the label	What the grade actually certifies	Are heavy metals limited for human intake?	Who it is made for
USP / pharmaceutical	Conformance to a pharmacopoeial monograph: identity, assay, and named impurity limits set for medicines	Yes. Elemental impurity limits are set on the assumption a human will ingest it	Hospitals, compounding pharmacies, drug manufacturers
ACS reagent	Suitability and consistency for analytical laboratory work	No. Limits exist, but they are set so the chemical does not interfere with an experiment	Laboratories
Reagent or lab grade, unspecified	Nothing standardised. The phrase has no governing body behind it	No. Nothing is guaranteed	General lab and industrial use
Aquarium, technical or dye grade	Fitness for the stated industrial purpose only. Often sold as a zinc chloride double salt rather than the chloride	No	Fish tanks, textiles, staining

The two rows people confuse are the first two, because ACS reagent sounds more official than it is in this context. ACS is a real and rigorous standard. It is a standard for laboratory reliability, not for human safety. A seller can label a product ACS reagent grade completely honestly and it is still not a product made to be swallowed. The practical test is simple: if the COA does not show elemental impurity results against a pharmacopoeial limit, the grade is not doing the job people assume it is doing.

Oral Supplements: Liquid vs. Capsules

For oral supplementation, methylene blue comes primarily as liquid solutions or capsules, with gummies now appearing as a third option. Each has advantages depending on your priorities, and each fails in a different way.

Liquid, capsules and gummies compared

Format	Dose precision	Blue mouth and teeth	What usually goes wrong	How easy is it to verify the grade?
Liquid solution	Highest. Measurable to the single milligram with a calibrated dropper or syringe	Yes, usually. Fades within hours	Concentration stated as a percentage only, leaving the buyer to do the mg per ml conversion	Easiest. One ingredient, so a batch COA maps directly to what is in the bottle
Capsules	Fixed. You get whatever is in the capsule, commonly 50 mg or 100 mg	Largely avoided, since the capsule passes the mouth intact	Fillers and flow agents that are not disclosed, and "proprietary blend" labelling that hides the actual methylene blue content	Moderate. The COA may cover the raw powder rather than the finished capsule
Gummies	Lowest. Content per gummy is harder to hold steady through manufacturing	Yes, plus tongue staining from the confection itself	Sugar, colourings and flavourings dominate the formula, and stability of the active in a gummy base is rarely demonstrated	Hardest. Few sellers publish a finished-product COA at all
Compounded by a pharmacy	Made to the prescribed figure	Depends on the form prepared	Access. It generally needs a prescriber, and not every pharmacy prepares it	Strongest, because the pharmacy is licensed and dispensing records exist

The honest summary of that table is that convenience and verifiability run in opposite directions. The format that is easiest to take is the one where it is hardest to find out what you actually took. Gummies in particular are a format built for palatability, and we have not seen a methylene blue gummy that publishes a finished-product certificate of analysis.

Pharmaceutical Liquid Solutions

Medical-grade liquid methylene blue, typically formulated at 0.5% to 1% concentration (5-10 mg/ml), offers the most precise dosing. You can measure exact amounts using a calibrated dropper or syringe, adjusting by single milligrams if needed. This matters because methylene blue's effects are dose-dependent, and the dosage chart sets out the figures by body weight.

Reputable compounding pharmacies prepare pharmaceutical-grade liquid methylene blue, though you'll typically need a prescription or a willing physician. Some online sources sell USP-grade liquid without prescription, but verify credentials thoroughly. Look for suppliers that provide batch-specific COAs and manufacture in FDA-registered facilities.

The taste is medicinal and slightly bitter. Most people mix it with water or juice. The obvious downside: your mouth and teeth temporarily turn blue. This fades within hours but can be socially awkward. Taking it with food helps minimize staining.

Pharmaceutical Capsules

Encapsulated methylene blue offers convenience and avoids the blue mouth issue. However, you sacrifice dosing precision. Capsules typically come in 50 mg or 100 mg doses, so fine-tuning becomes harder.

Quality varies wildly in the capsule market. Some manufacturers use pharmaceutical-grade powder and proper encapsulation processes. Others cut corners with lower-grade material or add unnecessary fillers. Premium options include products from compounding pharmacies that encapsulate USP-grade methylene blue to order.

A few specialized supplement companies have entered this space, marketing "nootropic" methylene blue capsules. Examine these carefully. Check for third-party testing, transparent sourcing, and realistic dosing (anything above 200 mg per capsule should raise questions). Be especially wary of proprietary blends that don't disclose exact methylene blue content.

Topical Applications: The Skincare Frontier

While oral supplementation gets most attention, topical methylene blue is emerging in skincare. The research most often cited for it is Xiong and colleagues, Scientific Reports, 2017, which reported that methylene blue supported skin cell proliferation and reduced markers of cellular senescence. Two things about that paper matter more than the headline. It was laboratory research rather than a trial in people, so it does not tell you what a cream will do to your face. And the percentage concentrations widely attributed to it, usually quoted as 0.5 to 5 percent or 1 to 2 percent, do not come from the paper at all.

What the paper actually used, since the number turns out to be findable. The 2017 experiments ran methylene blue at 100 nanomolar for four weeks, in cultured human skin fibroblasts and in a reconstructed three-dimensional human skin model. For methylene blue chloride that works out at roughly 0.000003 percent by weight in solution. A 0.5 percent formula is about 156,000 times that concentration, and a 2 percent formula about 625,000 times. This does not make a cosmetic percentage unreasonable, because a finished product has to carry the molecule through the stratum corneum rather than bathe a cell in a dish. It does mean the 2017 paper cannot be used to justify any particular percentage on a label, and that anyone citing it as the source of a 1 or 2 percent figure has not read it.

It is also worth being exact about what the 2017 study measured, because the two claims most often attached to it are not in it. The outcomes were reactive oxygen species levels, fibroblast proliferation, cellular senescence, viability, wound healing, hydration and dermis thickness in the 3D model, expression of elastin and collagen 2A1, and an irritation test on that same model. Skin elasticity and fine lines on a living person were not among them.

The proposed mechanism is mitochondrial. Methylene blue can act as an electron carrier, and the argument is that this helps cells that are producing energy less efficiently than they used to. That is a reasonable mechanism and it is the reason the ingredient is interesting. It is not the same thing as evidence that a finished product reduces lines on a human face, and no published trial in people has shown that yet. If you see a brand quoting elasticity or fine-line improvements as though they came from a clinical trial of topical methylene blue, ask which trial. We have not found one.

The same laboratory published a second skin paper in Scientific Reports in 2021, on ultraviolet protection in primary human keratinocytes. Methylene blue reduced UVB-induced DNA double-strand breaks, and at matched concentrations it absorbed UVB better than oxybenzone and cleared UVA-induced reactive oxygen species better, while methylene blue in seawater did not harm the coral species tested. That paper carries a conflict of interest its own authors declare, and it belongs next to the result: the senior author founded Mblue Labs, that company's chief executive is a co-author, and the university and the company have filed a joint patent application on methylene blue as a sunscreen active. The work can be sound and the interest can still be real.

Every study of methylene blue on skin, and what each one tested

Study	What it was done in	Concentration used	What was measured	How much weight it carries
Xiong et al. 2017, Scientific Reports 7:2475	Cultured human skin fibroblasts, from healthy donors and from progeria patients, plus a reconstructed 3D human skin model	100 nM, four weeks	Reactive oxygen species, fibroblast proliferation, senescence, viability, wound healing, hydration, dermis thickness, elastin and collagen 2A1 expression, irritation in the 3D model	The strongest skin evidence that exists for this ingredient. It is still laboratory evidence, not a trial in people
Xiong et al. 2021, Scientific Reports 11:10871	Primary human keratinocytes, and seawater tanks with the coral Xenia umbellata	Matched against oxybenzone at the same concentrations	UVB-induced DNA double-strand breaks, cell death, UVB absorption, UVA-induced reactive oxygen species, coral growth	Cell and coral experiments. Carries a declared commercial interest and a joint patent application
Xiong et al. 2016, Aging Cell 15(2):279-290	Cells from patients with progeria	Cell culture	Nuclear and mitochondrial abnormalities in a genetic premature ageing disease	Mechanistic, and about a rare disease rather than ordinary skin ageing
A randomised controlled trial of topical methylene blue on human skin	None has been published. As far as we can establish, no trial has measured wrinkles, elasticity or any visible outcome of topical methylene blue on living skin.

That last row is the one worth carrying away. Everything claimed for methylene blue in skincare, including by us, rests on cell and model work from essentially one research group. That is a real basis and it is a thin one.

The challenge with topical methylene blue is formulation. The compound is water-soluble but needs a vehicle that allows skin penetration. Some formulations use it in serums or creams with penetration enhancers. Others pair it with fat-based carriers that support absorption.

One approach combines methylene blue with grass-fed tallow in balm formulations. Tallow is a lipid base rather than a water-based one, which suits an occlusive balm, and most people tolerate it well. We used to say here that tallow's fatty acid profile closely mimics human sebum. That comparison is repeated everywhere, including by us, and we have not been able to find a study that measured both and reported how close the match is, so it is gone. When you add copper peptides like GHK-Cu, you get a formulation where each ingredient is doing a different job. We have written separately about why methylene blue and copper peptides are paired, about what the adjustment period on a copper peptide looks like, and about what the evidence on tallow does and does not support.

Products like our GHK-Cu Tallow Balm with Methylene Blue take this approach. The grass-fed tallow base supplies lipids and occlusion. The GHK-Cu addresses structural aging, and the human evidence for it is set out honestly in our review of the GHK-Cu studies. And the methylene blue contributes the mitochondrial mechanism described above.

This matters particularly for mature skin dealing with multiple aging concerns simultaneously. You're not just moisturizing or treating one issue. You're providing lipids (from tallow), structural support (from copper peptides), and a proposed cellular-energy contribution (from methylene blue) in a single formulation.

The concentration in quality topical products typically ranges from 0.5 to 2 percent methylene blue, which is a formulation convention rather than a figure established by a trial. Applied at night, any minor blue tint fades by morning.

What to Look for in Oral Products

If you're specifically seeking oral methylene blue supplements, use these criteria to separate legitimate products from questionable ones:

Purity Verification: Must provide third-party COA showing 98%+ purity and heavy metal testing. No exceptions.

Clear Concentration: Liquid should state mg/ml precisely (1% = 10 mg/ml). Capsules should state exact mg per dose. Avoid vague "proprietary blend" language.

Appropriate Dosing: For long-term use, products offering 50-100 mg per dose make sense. Anything above 300 mg per dose suggests a company that doesn't understand methylene blue's dose-response curve.

Pharmaceutical Source: Best options come from compounding pharmacies or manufacturers with pharmaceutical credentials. Supplement companies entering this space should demonstrate they understand they're handling a pharmaceutical compound, not just another nootropic.

Realistic Claims: Good suppliers provide information about mechanism and research without promising miracle results. Excessive claims about cognitive enhancement or anti-aging suggest marketing over science.

Proper Warnings: Legitimate suppliers clearly state contraindications, especially regarding antidepressant interactions. If a product doesn't mention serotonin syndrome risk, the manufacturer either doesn't know or doesn't care about safety.

The Compounding Pharmacy Option

For many people, the most reliable source for oral pharmaceutical-grade methylene blue remains compounding pharmacies. These state-licensed facilities prepare medications to order using USP-grade ingredients. Quality is typically excellent, though you'll need a physician's prescription or participate in their research/wellness programs.

Compounding pharmacies can prepare methylene blue at specific concentrations matched to your needs, whether that's 50 mg capsules or a 1% liquid solution. Costs vary but expect to pay $40-80 for a month's supply, depending on your dose and the pharmacy's pricing structure.

The main drawback is access. Not everyone has a physician willing to prescribe methylene blue for off-label cognitive support or longevity purposes. And not all compounding pharmacies prepare it routinely, so you may need to search for one that does.

Evaluating Newer Supplement Brands

Several supplement companies have launched methylene blue products in the past few years, targeting the biohacking and nootropics markets. These vary from impressively rigorous to concerningly careless.

Good signs include: extensive third-party testing, transparent sourcing from pharmaceutical suppliers, detailed educational content about proper use and contraindications, conservative dosing recommendations (starting low, increasing carefully), and responsive customer service that can answer technical questions.

Red flags include: claims about "proprietary formulations" that obscure actual methylene blue content, sourcing from non-pharmaceutical suppliers, absence of third-party testing, aggressive marketing focused on dramatic benefits, lack of clear contraindication warnings, and doses above 200 mg marketed for daily use.

Some legitimate players have emerged. Research individual companies thoroughly, read beyond their marketing materials, and check independent reviews from users who understand what they're evaluating.

How to Compare Methylene Blue Brands

The fastest way to compare two methylene blue brands is to ignore the marketing entirely and score them on six things that are either present on the website or absent from it. A brand that clears the first three is worth your time. A brand that fails any of the first three is not, no matter how good the rest looks.

#	What to check	Passes if	Fails if
1	Grade, named explicitly	The words USP or pharmaceutical grade appear, tied to the product you are buying	The page says only "high purity", "lab tested" or "99%" with no standard named
2	Batch-specific certificate of analysis	A COA you can open, with a batch or lot number matching the bottle, from a lab that is not the seller	A COA exists but has no lot number, or is described but not published, or is for the raw material rather than the finished product
3	Elemental impurity results	Lead, arsenic, cadmium and mercury are individually reported with limits	"Heavy metals: pass" with no figures, or the section is absent
4	Strength stated in milligrams	mg per ml for a liquid, mg per capsule for a solid	A percentage only, or a proprietary blend that hides the amount
5	Interaction warning	Serotonergic medication interaction is named on the product page, not buried in a disclaimer	No mention anywhere on the site
6	Who made it	A named manufacturer or licensed compounding pharmacy, and a registered facility	A white-label brand with no manufacturer named anywhere

Run that on any two brands and the comparison usually resolves in about five minutes, which is faster than reading a ranked list written by someone who has not held either bottle. It is also the reason this article does not publish a ranked list of brands. Formulations, suppliers and lot quality change faster than any ranking can be kept honest, and a checklist you can apply yourself outlives a table of brand names that was accurate once.

The Topical vs. Oral Question

Should you take methylene blue orally, apply it topically, or both? The answer depends entirely on your goals.

For cognitive enhancement, mitochondrial support, or systemic anti-aging effects, oral supplementation is the route people choose. The compound enters your bloodstream and distributes throughout your body. Effects reported in the research literature tend to be subtle, and most of the human work is on memory and cognition rather than on skin or longevity.

For skin-specific concerns, topical application delivers methylene blue to the skin without systemic exposure. What it then does there is still an open question, as set out above.

Some people use both. There is no research examining that combination, so if you do, account for total exposure and watch for side effects.

The Real Cost-Benefit Calculation

Price ranges for methylene blue products vary dramatically. You can find 100 ml of "methylene blue" on Amazon for $15. You can also pay $80 for a month's supply from a compounding pharmacy. The difference isn't markup or branding; it's whether you're getting pharmaceutical-grade material or industrial chemicals.

For oral use, budget $50-100 monthly for legitimate pharmaceutical-grade products. This includes either compounded capsules or liquid from reputable sources. Anything significantly cheaper should trigger skepticism about quality.

For topical use in quality skincare formulations, expect $40-75 for a 2-ounce jar that lasts 2-3 months with daily use. You're paying not just for methylene blue but for proper formulation with complementary active ingredients and bases that support absorption.

The real cost isn't the price tag, though. It's time invested in research to identify legitimate suppliers, and the risk if you get it wrong. Saving $30 by buying questionable products isn't worth potential heavy metal exposure or ineffective results that waste months.

Making Your Decision

The best methylene blue supplement for you depends on several factors: your specific goals (cognitive, skin, or systemic anti-aging), your comfort with different administration routes, your access to pharmaceutical-grade sources, and any contraindications you need to navigate.

For oral supplementation focused on cognitive or systemic benefits: Start with a compounding pharmacy if possible. If that's not accessible, research newer supplement brands thoroughly, prioritizing those with pharmaceutical credentials and comprehensive third-party testing.

For skin-specific anti-aging goals: Look for topical formulations that are honest about what the research covers, and treat any before-and-after claim with the scepticism the evidence base deserves.

For comprehensive anti-aging: Consider combining low-dose oral supplementation with topical application, monitoring your response to each carefully.

Whatever you choose, prioritize products with verified purity, transparent sourcing, appropriate dosing, and manufacturers who demonstrate actual understanding of what they're selling. Methylene blue has legitimate potential benefits, but only when you're using actual pharmaceutical-grade material in appropriate formulations.

Your cells deserve better than fish tank cleaner, no matter how good the price looks.

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Frequently Asked Questions

What is the difference between USP grade and reagent grade methylene blue?

USP grade is certified against a pharmacopoeial monograph written for medicines, so its impurity limits assume a person will ingest the product. Reagent grade is certified for laboratory reliability instead. Both can be honest labels. Only the first is set up to answer the question a person swallowing it needs answered.

Are methylene blue capsules or liquid better?

Liquid gives finer control of the amount and makes the certificate of analysis easier to match to the bottle. Capsules are more convenient and avoid the blue mouth. Neither is better in the abstract. Choose liquid if precision matters to you, capsules if consistency and convenience matter more, and check the grade either way.

Are methylene blue gummies worth buying?

Gummies are the hardest format to verify. Content per piece is harder to hold steady in manufacturing, the active sits in a sugar and flavouring base whose stability is rarely demonstrated, and finished-product certificates of analysis are uncommon in this category. If a gummy is the only format you will actually take, look for a finished-product COA with a lot number before anything else.

Does a 99% purity claim mean a product is pharmaceutical grade?

No. A purity percentage on its own says nothing about what the remaining fraction is, or whether elemental impurities were measured against a limit meant for human intake. A number without a named standard behind it is marketing. Look for the standard named, and for individual lead, arsenic, cadmium and mercury results on a batch certificate.

Is there a clinical trial showing topical methylene blue reduces wrinkles?

Not that we have been able to find. The work usually cited is laboratory research, not a trial in people. The mechanism is plausible and the laboratory results are interesting, but a brand that presents them as proof of a cosmetic result is overstating what has been shown.

What concentration of methylene blue did the skin research actually use?

100 nanomolar, in cell culture and in a reconstructed 3D skin model, over four weeks. That is roughly 0.000003 percent by weight, which is a tiny fraction of the 0.5 to 2 percent that cosmetic products use. The gap is not necessarily a problem, because a product has to get the molecule into skin rather than onto a cell in a dish, but it does mean the published research cannot be cited as the source of any particular label percentage.

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References

1. Poteet, E., Winters, A., Yan, L. J., Shufelt, K., Green, K. N., Simpkins, J. W., ... & Yang, S. H. (2012). Neuroprotective actions of methylene blue and its derivatives. PLoS One, 7(10), e48279.
2. Xiong, Z. M., O'Donovan, M., Sun, L., Choi, J. Y., Ren, M., & Cao, K. (2017). Anti-aging potentials of methylene blue for human skin longevity. Scientific Reports, 7(1), 2475.
3. Xiong, Z. M., Mao, X., Trappio, M., Arya, C., El Kordi, J., & Cao, K. (2021). Ultraviolet radiation protection potentials of methylene blue for human skin and coral reef health. Scientific Reports, 11(1), 10871.
4. Xiong, Z. M., Choi, J. Y., Wang, K., Zhang, H., Tariq, Z., Wu, D., Ko, E., LaDana, C., Sesaki, H., & Cao, K. (2016). Methylene blue alleviates nuclear and mitochondrial abnormalities in progeria. Aging Cell, 15(2), 279-290.
5. Callaway, N. L., Riha, P. D., Bruchey, A. K., Munshi, Z., & Gonzalez-Lima, F. (2004). Methylene blue improves brain oxidative metabolism and memory retention in rats. Pharmacology Biochemistry and Behavior, 77(1), 175-181.
6. Pickart, L., & Margolina, A. (2018). Regenerative and protective actions of the GHK-Cu peptide in the light of the new gene data. International Journal of Molecular Sciences, 19(7), 1987.
7. Rojas, J. C., Bruchey, A. K., & Gonzalez-Lima, F. (2012). Neurometabolic mechanisms for memory enhancement and neuroprotection of methylene blue. Progress in Neurobiology, 96(1), 32-45.
8. Telch, M. J., Bruchey, A. K., Rosenfield, D., Cobb, A. R., Smits, J., Pahl, S., & Gonzalez-Lima, F. (2014). Effects of post-session administration of methylene blue on fear extinction and contextual memory in adults with claustrophobia. American Journal of Psychiatry, 171(10), 1091-1098.
9. Tucker, D., Lu, Y., & Zhang, Q. (2018). From mitochondrial function to neuroprotection, an emerging role for methylene blue. Molecular Neurobiology, 55(6), 5137-5153.
10. Schirmer, R. H., Adler, H., Pickhardt, M., & Mandelkow, E. (2011). Lest we forget you, methylene blue. Neurobiology of Aging, 32(12), 2325.e7-2325.e16.
11. Gureev, A. P., Shaforostova, E. A., & Popov, V. N. (2019). Regulation of mitochondrial biogenesis as a way for active longevity: Interaction between the Nrf2 and PGC-1 alpha signaling pathways. Frontiers in Genetics, 10, 435.
12. Peter, C., Hongwan, D., Kupfer, A., & Lauterburg, B. H. (2000). Pharmacokinetics and organ distribution of intravenous and oral methylene blue. European Journal of Clinical Pharmacology, 56(3), 247-250.
13. Stack, C., Jainuddin, S., Elipenahli, C., Gerges, M., Starkova, N., Starkov, A. A., ... & Dumont, M. (2014). Methylene blue upregulates Nrf2/ARE genes and prevents tau-related neurotoxicity. Human Molecular Genetics, 23(14), 3716-3732.

Related reading

• Methylene blue for skin
• GHK-Cu benefits for skin, and the human studies that exist
• Shop copper peptides
• Methylene blue dosage chart
• Methylene blue and copper peptides
• Copper uglies and copper peptide side effects

Revision history: 2026-10-19. Two runs of our editorial process worked on this page the same day. An unverifiable 2019 Journal of Pharmaceutical Sciences citation was removed and the removal disclosed above. The concentration used in the 2017 skin research was then traced to the paper and stated: 100 nanomolar, not the 0.5 to 5 percent previously attributed to it. The 2021 ultraviolet paper was added with its declared conflict of interest, along with a table of every published study of methylene blue on skin, and the claim that tallow closely mimics human sebum was removed as unverifiable.