Best Methylene Blue Supplements in 2026: 7 Products Compared

Last updated: July 30, 2026 · Published April 10, 2026 · By NooBlue Editorial · 7 products compared

Shopping for the best methylene blue supplements is unusually hard, because the thing you are buying — milligrams of a single, well-characterised compound — is priced and labelled in six incompatible ways. One brand sells a 16 mg lozenge in a four-pack. Another sells a dropper bottle rated in total milligrams. A third quotes a per-serving price that hides a two-capsule serving. Comparing sticker prices tells you almost nothing.

So this comparison normalises everything to one unit — cost per 5 mg of methylene blue — and adds a second column almost no roundup includes: the smallest dose each product can actually deliver. Together those two numbers change the ranking, and they are why the cheapest product per milligram is not the cheapest way to take a 5 mg dose.

The best methylene blue supplement for most people is NooBlue Ultimate Methylene Blue Capsules — the only product compared that delivers exactly 5 mg per capsule, at $0.63 per 5 mg dose, USP grade with a verified certificate of analysis.

Key numbers:

• $0.28 – $2.11 — the range of cost per 5 mg of methylene blue across the 7 products compared, a 7.5× spread (seller product pages, read July 30, 2026).
• 0.25 mg to 16 mg — the range of smallest deliverable dose. Liquids titrate by the drop; a 16 mg troche does not.
• 5 mg — the dose most commonly used by people taking methylene blue as a nootropic, and the increment three of the seven products cannot produce.
• 4 of 7 brands state USP grade on the product page; only 2 of 7 publish an actual certificate of analysis on the site rather than supplying one on request.

Best Methylene Blue Supplements in 2026 at a Glance

Every row is normalised to the same unit. “Price / 5 mg” is total price divided by total milligrams of methylene blue, expressed per 5 mg. “Smallest dose” is the finest increment the format can reliably deliver — one drop, one capsule, or one scored fraction of a troche.

Prices read from each seller’s own product page on July 30, 2026, and include current sale pricing where a sale was running. aSquared Nutrition does not state a capsule count on its product page, so its cost per 5 mg could not be calculated honestly and has been left out rather than estimated.

How We Picked the Best Methylene Blue Supplements

Purity grade carries the most weight, because with a single-molecule compound there is little else in the bottle to differentiate. USP grade is the highest designation any of these products claim; below it sit “pharmaceutical grade” as a marketing phrase, then lab grade, then the aquarium and industrial material that should never be swallowed. We break down the full hierarchy in our guide to methylene blue purity grades and what they mean, and for encapsulated products specifically in our comparison of pharmaceutical-grade methylene blue capsules.

Second is whether a certificate of analysis exists and whether you can see it — there is a meaningful difference between publishing the assay for a named lot and emailing one on request. Third is cost per 5 mg, computed rather than quoted. Fourth is reputation. Fifth is form factor, which is where dose granularity lives and where most comparisons stop short.

Before any of this matters you need a target dose. Most people taking methylene blue as a nootropic settle between 5 mg and 15 mg daily, and 5 mg is the most common starting point. Our methylene blue dosage guide covers why higher is not automatically better. Read it first — the right product depends entirely on the dose you are aiming for.

1. NooBlue Ultimate Methylene Blue Capsules — Best Overall

Key specs: 60 capsules, 5 mg USP-grade methylene blue each, with vitamin C. $37.99 (regular price $49.99). $0.63 per 5 mg. One capsule daily.

This is the only product here built around a 5 mg unit. That sounds like a small distinction until you try to take 5 mg of anything else in the set. Earth Harmony’s capsule is 12 mg; LVLUP’s is 10 mg. Neither can be halved accurately — capsule contents are a powder blend, and splitting one gives you an unknown fraction. If your target is 5 mg, a 12 mg capsule is not a cheaper route to it; it is a different dose.

The formula is deliberately plain: methylene blue and vitamin C in a vegetable-cellulose capsule, nothing else. Vitamin C is there because methylene blue is redox-active and oxidises over time. No berberine, no chlorophyllin, no cacao, no proprietary blend — which matters if you already run a stack, because extra actives you did not choose are extra variables when something disagrees with you.

Every batch is third-party tested for purity and heavy metals, verified at 99.9%+ pharmaceutical-grade purity, produced in a GMP-certified facility, with a certificate of analysis for the lot you receive. On raw cost per milligram NooBlue sits mid-pack at $0.63, and we will not pretend otherwise — Earth Harmony is cheaper. What NooBlue wins is cost per dose you can actually take at 5 mg.

Pros:

• Only product here delivering exactly 5 mg per unit
• USP grade with a verified certificate of analysis per batch
• Two-ingredient formula, no extra actives; two-month supply per bottle
• Free worldwide shipping over $100; ships to the UK and Europe (GBP/EUR at checkout)

Cons:

• Not the cheapest per milligram — Earth Harmony is $0.28 per 5 mg versus $0.63
• Smaller brand with a shorter review history than the Amazon-native labels
• Going below 5 mg requires the liquid instead

Best for: anyone targeting 5 mg who wants that dose exactly, USP grade with a COA, and no proprietary blend attached.

View Ultimate Methylene Blue Capsules 60x5mg →

2. NooBlue Methylene Blue Drops 1% USP — Best Value at a 5 mg Dose

Key specs: 50 mL bottle, 1% USP solution (10 mg/mL, 500 mg total), precision dropper. $29.99 (regular price $39.99). $0.30 per 5 mg. Roughly 0.5 mg per drop.

At $0.30 per 5 mg this is the cheapest way to actually take a 5 mg dose among everything compared, by a wide margin over the other liquid in the set. The bottle holds 500 mg of methylene blue — more than three times the 150 mg in the Meraki bottle — for less money.

The trade-off is handling. Methylene blue is a powerful dye, and a 1% solution will stain a countertop, a shirt and briefly your tongue. You dilute it in water, ideally in a glass, ideally through a straw. In exchange you get titration capsules cannot offer: half doses, quarter doses, and the ability to work upward from 1 mg while you gauge how you respond. We compare the formats directly in methylene blue capsules versus liquid.

Read concentration carefully across brands, because “1%” is used loosely here. A true 1% solution is 10 mg per mL; a 30 mL bottle containing 150 mg is 0.5%, whatever the headline says. Check total milligrams against bottle volume — the arithmetic is more reliable than the front label.

Pros:

• Lowest cost per 5 mg dose of any product compared, at $0.30
• Genuine 1% USP solution — 500 mg in 50 mL, verifiable by arithmetic
• Titrates to roughly 0.5 mg per drop; same COA as the capsules

Cons:

• Stains surfaces, fabric and temporarily the mouth
• Requires measuring every time; less convenient than a capsule
• Drop size varies slightly, so it is precise but not exact

Best for: people who want the lowest real cost per dose, or who want to start below 5 mg and titrate upward.

View Methylene Blue Solution 1% 50ML →

3. Earth Harmony Ultimate Methylene Blue — Lowest Cost Per Milligram

Key specs: 60 capsules, 12 mg each (720 mg total), with vitamin C, organic berberine, chlorophyllin and chlorophyll. $39.95. $0.28 per 5 mg. Smallest dose 12 mg.

Earth Harmony wins the raw cost-per-milligram column outright and deserves the credit. At $0.28 per 5 mg it is cheaper than both NooBlue products on a pure milligram basis, the methylene blue is stated as 99.99% USP grade, it is formaldehyde-free, manufactured in Phoenix, Arizona in a cGMP ASI-certified facility, and third-party tested.

The catch is exactly what the normalisation exercise is designed to surface: you cannot buy 5 mg from this bottle. The smallest dose is one 12 mg capsule. If 12 mg is your target, this is the best value in the comparison and you should buy it. If 5 mg is your target, the $0.28 figure is not available to you — you would take 12 mg at $0.67 per capsule, which is more compound and more money per dose than NooBlue’s drops.

The added blend is the second consideration. Berberine is pharmacologically active in its own right and interacts with a number of medications; chlorophyllin and chlorophyll are benign but are not what most people are shopping for. Whether that is a feature or an unwanted variable depends on you.

Pros:

• Cheapest methylene blue per milligram here at $0.28 per 5 mg
• 99.99% USP grade, formaldehyde-free, cGMP ASI-certified US manufacturing
• Third-party tested with a strong retail review base

Cons:

• 12 mg fixed increment — cannot produce a 5 mg dose
• Berberine is an active compound with its own interaction profile
• COA not published on the product page

Best for: people targeting 10–12 mg who want the most methylene blue per dollar.

4. Meraki Blu USP Grade Methylene Blue — Best Published Lab Results

Key specs: 30 mL bottle, 150 mg total methylene blue, roughly 0.25 mg per drop. $35.00 one-time ($28.00 on subscription). $1.17 per 5 mg.

Meraki does the one thing almost nobody else here does: it publishes actual certificate-of-analysis images on the product page, tied to a named lot, rather than offering to send one on request. For a compound where purity is essentially the entire product, that transparency counts — and it is why Meraki ranks here despite costing four times Earth Harmony per milligram. It also has the finest titration of anything compared, around 0.25 mg per drop, which is genuinely useful if you are sensitive or want to start at 1 mg.

Two honest cautions. First, the arithmetic: 150 mg in 30 mL is a 0.5% solution, notwithstanding third-party listings describing it as 1%. Buy on the milligram figure. Second, Meraki’s own product page describes the product as being for research purposes only — the brand’s own labelling, and a meaningful difference from products sold outright as dietary supplements. Not a reason to dismiss it, but know it is there before you buy.

Pros:

• Publishes real lot-numbered COA images on the product page
• Finest dose granularity here at roughly 0.25 mg per drop
• USP grade, third-party tested, large verified review base

Cons:

• $1.17 per 5 mg — nearly 4× NooBlue’s drops for the same milligrams
• 150 mg in 30 mL is 0.5%, not the 1% some listings claim
• Self-described as research-use-only on the brand’s own page

Best for: buyers who prioritise seeing the actual lab result, and who want very fine dose control.

5. LVLUP Health Mito Blue — Best All-in-One Mitochondrial Stack

Key specs: 60 capsules, 10 mg methylene blue each, plus 400 mg acetyl-L-carnitine, 100 mg ubiquinol and 10 mg PQQ. $109.99. $0.92 per 5 mg of methylene blue. Smallest dose 10 mg.

Mito Blue is not really competing on methylene blue price, and judging it that way is unfair. You are buying four actives: methylene blue for electron transport, acetyl-L-carnitine for fatty-acid transport into the mitochondrion, ubiquinol as the reduced form of CoQ10, and PQQ. Priced individually, 400 mg of ALCAR and 100 mg of ubiquinol daily are not cheap, so bundling them is a legitimate convenience.

The trade-off is control. You cannot adjust the methylene blue without adjusting the other three, and at 10 mg per capsule it is fixed at double the common 5 mg starting point. If you already take CoQ10 or carnitine you will be double-dosing. We compare the two directly in LVLUP Mito Blue and NooBlue compared side by side.

Pros:

• Four mitochondrial ingredients in one daily capsule
• Pharmaceutical-grade methylene blue, GMP manufacturing, third-party verified per lot
• Convenient if you would otherwise buy ALCAR, ubiquinol and PQQ separately

Cons:

• $109.99 is by far the highest entry price here
• Fixed 10 mg methylene blue, not titratable independently
• Double-dosing risk if you already supplement CoQ10 or carnitine

Best for: people wanting a complete mitochondrial formula in one capsule, not controlling the methylene blue dose separately.

6. Troscriptions Just Blue — Best for Rapid Onset

Key specs: 4 scored sublingual troches per pack, 16 mg each (64 mg total), yielding up to 16 quarter-troche doses of about 4 mg. $27.00. $2.11 per 5 mg.

Just Blue is the only buccal product here and the only one that bypasses first-pass liver metabolism. The troche sits between cheek and gum and dissolves over 15 to 30 minutes, with onset in that same window rather than the 30 minutes to two hours typical of a swallowed capsule. If onset speed is what you are optimising for, nothing else here competes.

It is also the most expensive per milligram by a distance — $2.11 per 5 mg, more than seven times NooBlue’s drops. The troches are scored into quarters, so roughly 4 mg increments are achievable. Purity credentials are strong: USP grade, cGMP facility, physician-formulated, every batch tested twice, with the certificate of analysis supplied by email on request rather than published. One practical note: Troscriptions products are now distributed exclusively through healthcare practitioners, so you cannot simply add one to a cart. Factor that in before settling on it.

Pros:

• Fastest onset of any format compared — 15 to 30 minutes
• USP grade, cGMP, physician-formulated, twice-tested per batch
• Scored troches allow roughly 4 mg increments

Cons:

• Most expensive per milligram at $2.11 per 5 mg
• Only 64 mg per pack — a short supply at daily use
• Sold only through healthcare practitioners, not direct to consumer
• Stains mouth and teeth noticeably for 2 to 24 hours

Best for: occasional, fast-acting use where onset speed matters more than cost per dose.

7. aSquared Nutrition Methylene Blue Capsules — Cheapest Entry Price

Key specs: 12 mg pharmaceutical-grade methylene blue per 2-capsule serving (6 mg per capsule), with cacao, alpha-lipoic acid, MCT oil powder and vitamin C ester. $24.95 (regular price $34.99). Capsule count not stated on the product page.

At $24.95 this is the lowest entry price in the comparison, and the formulation has thoughtful touches — white capsules rather than clear ones, specifically to shield a light-sensitive compound from degradation, and vitamin C ester to slow oxidation. It is third-party tested in an ISO 17025-certified facility, a more specific claim than a generic “lab tested” badge. The 6 mg per capsule increment is also closer to a 5 mg target than the 10 and 12 mg capsules above it, though the labelled serving is two capsules.

We could not calculate a cost per 5 mg for it. The product page states the per-serving dose but not the capsule count, and without that any cost-per-dose figure would be invented rather than computed, so we left the cell blank. That is the honest read for you as a buyer too: if a listing will not tell you how many units you are getting, you cannot compare it on price — ask before ordering.

Pros:

• Lowest entry price in the comparison at $24.95
• ISO 17025-certified third-party testing
• Light-blocking white capsules and vitamin C ester for stability
• 6 mg per capsule gets closer to 5 mg than most capsules here

Cons:

• Capsule count not stated — cost per dose cannot be calculated
• Multi-ingredient blend rather than plain methylene blue
• No reviews on the brand’s own product page at time of writing

Best for: buyers testing the category at the lowest upfront cost, willing to ask the seller for a capsule count first.

How We Evaluated Every Methylene Blue Supplement

The weighting below is fixed and applied identically to all seven products.

• Purity grade — 40%. USP grade ranks highest, then pharmaceutical grade as a self-described standard, then lab grade, then food grade, then undisclosed. Aquarium and industrial material is excluded outright.
• Third-party testing and certificate of analysis — 20%. A published lot-numbered COA scores highest; one supplied on request scores lower; a bare “lab tested” badge scores lowest.
• Cost per 5 mg — 20%. Computed from total price divided by total milligrams — never quoted from the seller, and never mixing a per-capsule figure against another brand’s per-serving figure.
• Customer reviews and reputation — 10%. Volume and consistency of verified reviews.
• Form factor and convenience — 10%. Dose granularity, staining, portability, shelf stability.

We compare published specifications, prices and lab documentation. We do not run independent laboratory assays on other brands’ products, and no roundup claiming to have “tested” seven competitors’ bottles is likely to have done so either. Where we describe third-party testing for NooBlue’s own products, that refers to the certificates of analysis for those SKUs.

Red Flags to Avoid When Buying Methylene Blue

Four things should stop a purchase immediately.

No stated grade. If a listing does not say USP or pharmaceutical grade anywhere, assume it is neither. Industrial and aquarium-grade methylene blue is far cheaper and is not made to a standard contemplating human consumption — it can carry heavy metals and manufacturing residues no one has assayed.

No certificate of analysis, and no way to get one. A brand that cannot produce a COA for the lot in your hand does not know what is in it either. Our guide to reading a methylene blue certificate of analysis covers what the document should contain.

Percentage claims that fail arithmetic. A 1% solution is 10 mg per mL. Multiply concentration by bottle volume and check it against the stated total milligrams. When it does not match, the label is wrong somewhere.

A price that is impossibly low. There is a floor to what USP-grade material plus real testing plus encapsulation costs. Well below $0.28 per 5 mg — the cheapest legitimate figure in this comparison — something has been left out, usually the testing.

How to Verify a Methylene Blue COA Before You Buy

A certificate of analysis is only useful if you read it. Four fields matter. The lot number must match the bottle you received — a generic undated COA on a website is a marketing asset, not a test result. The assay is the purity figure; USP-grade material should read 99% or above, and a reported range rather than a measured value means you are looking at a specification sheet. Heavy metals — lead, arsenic, cadmium, mercury — should each carry a measured result and a limit. And the date and laboratory must name an independent lab and fall within the product’s shelf life; if the lab is the manufacturer, it is not third-party testing whatever the marketing says.

Is Methylene Blue Safe to Take as a Supplement?

Interest in methylene blue as a nootropic rests on a mechanism that is reasonably well described. A review in Progress in Neurobiology set out how low-dose methylene blue can act as an alternative electron carrier in the mitochondrial electron transport chain, and discussed the resulting effects on brain energy metabolism (PMID 22067440). In a randomised controlled trial published in Radiology, a single low dose of methylene blue was associated with changes in functional MRI response during sustained attention and memory tasks in healthy adults (PMID 27351678). Earlier work in Pharmacology, Biochemistry, and Behavior reported improved brain oxidative metabolism and memory retention — that study was conducted in rats, and animal findings do not transfer directly to people (PMID 14724055).

These studies suggest a plausible mechanism and some human signal. They do not establish that a daily supplement produces any particular outcome, and nobody selling methylene blue is in a position to tell you it will.

The interaction that matters most is serotonergic. Research published in the British Journal of Pharmacology confirmed that methylene blue inhibits monoamine oxidase A, which is the mechanism behind its potential to contribute to serotonin toxicity when combined with serotonergic drugs (PMID 17721552). In practice: methylene blue should not be combined with SSRIs, SNRIs, MAO inhibitors or other serotonin-affecting medications without a doctor’s supervision. Every brand in this comparison carries that warning, and they are right to.

The second documented caution is G6PD deficiency, which we cover in detail in methylene blue and G6PD deficiency. It is also not for use during pregnancy or breastfeeding. Beyond that, the common effects are cosmetic and dose-dependent — blue urine, temporary staining of the mouth — and we catalogue the broader picture in our guide to methylene blue side effects. Talk to your doctor before starting, particularly if you take any prescription medication.

Frequently Asked Questions About the Best Methylene Blue Supplements

What is the best methylene blue supplement?

NooBlue Ultimate Methylene Blue Capsules is the best methylene blue supplement for most people, because it is the only product in this comparison that delivers exactly 5 mg per capsule at $0.63 per dose, USP grade with a per-batch certificate of analysis. If you want the lowest cost per milligram regardless of increment, Earth Harmony Ultimate Methylene Blue is cheaper at $0.28 per 5 mg. If onset speed matters most, Troscriptions Just Blue is the only sublingual option here.

What is the best form of methylene blue?

Capsules are the best form for most people, because they remove measuring and staining from the routine — NooBlue’s 5 mg capsule is the most precise of these. Liquid is better if you want to titrate: NooBlue’s 1% solution allows roughly 0.5 mg increments and works out cheapest per dose at $0.30 per 5 mg. Sublingual troches such as Troscriptions Just Blue are the fastest-acting form but the most expensive per milligram.

What not to mix with methylene blue?

Do not mix methylene blue with SSRIs, SNRIs, MAO inhibitors, tricyclic antidepressants, triptans or any other serotonin-affecting drug without medical supervision — methylene blue inhibits monoamine oxidase A, which creates a risk of serotonin toxicity. Avoid combining it with psychedelics for the same reason. Alcohol is also commonly advised against. If you take any prescription medication, check with your doctor before starting.

Can I take methylene blue every day?

Many people do take a low dose of methylene blue daily, typically 5 to 15 mg, and NooBlue’s 60-capsule bottle is sized as a two-month daily supply. Some users prefer to cycle — five days on and two off, or four weeks on and one off. There is no strong evidence establishing an optimal schedule, so this is a question for your doctor, particularly for long-term use.

Can you take methylene blue if you have lupus?

There is no reliable evidence addressing methylene blue specifically in people with lupus, so no supplement brand can responsibly answer this for you — ask your rheumatologist. The two documented contraindications that apply to everyone are G6PD deficiency and concurrent serotonergic medication, and lupus is frequently managed with drugs that carry their own interaction profiles, which makes individual medical advice more important, not less.

What dose of methylene blue should I take?

Most people using methylene blue as a nootropic take 5 to 15 mg daily, and 5 mg is the most common starting point — which is why NooBlue’s capsules are built around that exact increment. Start at the low end and hold there for a couple of weeks before adjusting. Our methylene blue dosage guide covers how to work upward sensibly.

How can I tell if methylene blue is pharmaceutical grade?

Ask for the certificate of analysis for your specific lot and check the assay figure — USP-grade material should test at 99% or above, with measured heavy-metal results rather than an unquantified “complies”. NooBlue publishes a COA per batch verified at 99.9%+ purity. If a seller cannot produce a lot-matched COA, treat the grade claim on the label as unverified.

Where can I buy methylene blue?

The most reliable route is buying direct from a brand that publishes a certificate of analysis, such as NooBlue, which ships worldwide with free shipping over $100. Methylene blue is not generally stocked as a supplement by mainstream pharmacies — we cover what stores actually carry in where to find methylene blue in stores and pharmacies. Marketplace listings vary widely in grade and documentation, so check for a lot-matched COA before ordering.

The Verdict: Which Methylene Blue Supplement Wins in 2026

For a 5 mg daily dose — the most common target — NooBlue Ultimate Methylene Blue Capsules is the clear winner, because it is the only product compared that produces a 5 mg dose without splitting anything, at $0.63 per dose with USP grade and a per-batch certificate of analysis. If you want the lowest real cost per dose and do not mind measuring, NooBlue Methylene Blue Drops 1% USP is the better buy at $0.30 per 5 mg and titrates to roughly 0.5 mg.

If your target is 10 to 12 mg, go with Earth Harmony Ultimate Methylene Blue — genuinely the cheapest methylene blue per milligram here at $0.28 per 5 mg, and it earns that win. If seeing the lot-numbered lab result matters most, Meraki Blu publishes its COAs openly and titrates the finest of any product compared. If you need onset in under half an hour, Troscriptions Just Blue is the only sublingual option, at a considerable premium.

The broader lesson from normalising the set: headline price tells you very little, the cheapest product per milligram is often not the cheapest way to take your dose, and the number worth comparing is cost per dose you can actually deliver.