Ultra Pure Methylene Blue

review_customer-icons

Toni C.

Verified Buyer

Excellent and definitely has a positive effect regarding tiredness, brain fog and inflammation 👍👍👍👍

Ultra Pure Methylene Blue

View latest third party test certificate

60 servings | 10mg dose | From £0.23 per serving

Precision methylene blue for cleaner energy, clearer focus, and steadier daily performance.
Energy: Enhance mitochondrial performance Brain: Boost focus and cognitive clarity Longevity: Protect cells from oxidative stress

With reverse osmosis distilled water

Third-party batch tested

700-day purity guarantee

Size 1 Bottle 3 Bottles 6 Bottles

In stock • Ships today • 24–48 hour delivery

Alpha GPC Supplement

Alpha GPC Supplement

MitoSurge Urolithin A Supplement

MitoSurge Urolithin A Supplement

review_customer-icons

Toni C.

Verified Buyer

Excellent and definitely has a positive effect regarding tiredness, brain fog and inflammation 👍👍👍👍

Zero Fillers or Binders

700-Day Purity Guarantee

Third-Party Batch Testing

Zero Fillers or Binders

700-Day Purity Guarantee

Third-Party Batch Testing

Join thousands who are extending their healthspan

Join thousands who are extending their healthspan

Independently Verified Customer Reviews

“Really works at giving me more energy and focus.”

Mike W.

Verified Buyer

“Absolute visible pure compared to the other rubbish I bought elsewhere.”

Ian R.

Verified Buyer

“The dropper holds 15 drops which facilitates quick and easy application."

Patrick O.

Verified Buyer

“Fantastic company. I will keep ordering as long as they supply.”

Edel O’Callaghan

Verified Buyer

How to take it

The daily dose
Fifteen drops — 10mg of pharmaceutical-grade methylene blue — in a large glass of water, once a day, with or after food. One 60ml bottle is 60 doses, so a bottle lasts two months.

 

Drink it through a straw
Methylene blue is a dye. Sipped straight from the glass it will temporarily tint your teeth and tongue blue. Through a straw, it won't touch them. Rinse with plain water afterwards and you'll notice nothing at all. Any tint that does appear sits on the surface and brushes off — it doesn't stain enamel.

 

And yes, your urine will turn blue-green
Completely expected and completely harmless. It's the visible sign the dose has been absorbed and is clearing, and it settles within a day. Nobody warns first-time users about this, which is why it's the thing people email us about most.

 

When to take it
Morning or early afternoon suits most people. Some find it too energising close to bedtime — if that's you, move it earlier in the day rather than reducing the dose.

 

What it feels like
Steadier, not sharper. Most people describe cleaner energy through the afternoon rather than a stimulant hit. If you're expecting a rush, this isn't that, and it isn't meant to be.

 

What's in it
Two ingredients: USP pharmaceutical-grade methylene blue and reverse osmosis distilled water. No fillers, no flow agents, no cosmetic extras. What you're judging is the compound itself.

Actives Only
Backed by three guarantees

Zero fillers, zero binders, zero flow agents across the entire range.

 

Every order is covered three ways:

 

✓ THE PURITY CHALLENGE
Buy any Methylene Blue product with a cleaner label than ours, send us the receipt and label -we refund every penny you paid us.

 

✓ 60-DAY MONEY-BACK GUARANTEE
Not for you? Full refund, no questions.

 

✓ 700-DAY POTENCY GUARANTEE
Pure and potent from day 1 to day 700. Buy in bulk with confidence — your last bottle is guaranteed as strong as your first.

Actives Only

Backed by three guarantees

Zero fillers, zero binders, zero flow agents — across the entire range.
Every order is backed three ways:

 

✓ THE PURITY CHALLENGE: Buy any Methylene Blue product with a cleaner label than ours, send us the receipt and label — we refund every penny you paid us.

 

✓ 60-DAY MONEY-BACK GUARANTEE: Not for you? Full refund, no questions.

 

✓ 700-DAY POTENCY GUARANTEE: Pure and potent from day 1 to day 700. Buy in bulk with confidence — your last bottle is guaranteed as strong as your first.

Third-party Tested

Third-party Tested

Purity proof for every batch

Every batch is tested by an independent laboratory to verify what is in the product — and what is not.


Because purity claims mean nothing if they only come from the brand selling it.

 

View latest CoA →

Every batch is tested by an independent laboratory to verify what is in the product — and what is not.


Because purity claims mean nothing if they only come from the brand selling it.

 

View latest CoA →

What the evidence says

Why Methylene Blue Keeps Getting Studied

Low-dose methylene blue continues to attract research interest because it interacts with systems linked to cellular energy, brain function, and oxidative stress.

Studied for brain activity and memory performance

In a human study, low-dose methylene blue was associated with improved regional brain activity during memory tasks.

 

Why it matters: this helps explain why some users value it for cleaner focus and better mental endurance, rather than a stimulant-like spike.

Human evidence

Studied as a mitochondrial electron carrier

Mechanistic and review literature has explored its role in helping support mitochondrial respiration and oxygen use.


Why it matters: if a product supports the efficiency of cellular energy handling, the benefit may show up as steadier output and less drag across the day.

Mechanistic evidence

Studied for neuronal resilience and oxidative stress

Low-dose Methylene Blue has been studied in the context of neuronal resilience and reduced oxidative stress markers.


Why it matters: this is one reason the compound continues to attract interest in brain health and healthy ageing discussions.

Preclinical evidence

Measurable Results From Day 1

After 2 Weeks

Feel a noticeable boost in mental clarity and focus as the "backup wires" in your cellular power stations (mitochondria) begin to enhance energy flow.

After 6 Weeks

Experience a greater sense of resilience and steady energy as your metabolic sensors are fine-tuned, allowing your body to manage fuel and oxygen more efficiently.

After 12 Weeks

Notice a calmer, more balanced feeling across your systems as the inflammatory "static" between your cells is reduced, allowing for clearer and more harmonious communication.

After 6 Months

Benefit from sustained cellular protection as the long-term support for your DNA and cellular repair crews helps to reduce the accumulation of worn-out "zombie" cells.

Proof vs. Promises

Longevity Box Methylene Blue

>99% Purity

Zero Nasties. Ever.

3rd Party Tested

700 Day Purity Guarantee

Evidence-Led Formulation

Other Brands

Inferior Purity

Fillers, Additives, Preservatives, Binders, Exipients

No Independent Testing

30 Day Guarantee

Rarely validated by top scientific institutions

You can buy methylene blue for £12. Here's what that buys.

We're not the cheapest and we're not going to pretend otherwise. Most cheap methylene blue is laboratory or industrial grade — manufactured to a standard that permits heavy metal residues and formaldehyde contamination, because it's intended for staining slides and treating fish tanks, not for daily human use. That standard is why it costs £12.

 

Ours is USP pharmaceutical grade, made with reverse osmosis distilled water, and independently tested batch by batch in a UK laboratory. The certificate for the batch you'll receive is on this page — not a link to a policy, the actual document, with the batch number and the purity figure on it.

 

And if you find a methylene blue with a cleaner label than ours, send us your receipt and the label. We'll refund every penny you paid us.

Targets 7 Hallmarks of Ageing

Mitochondrial Dysfunction

Mitochondrial Dysfunction

Supports the energy systems that help cells run cleanly and efficiently.

Deregulated Nutrient-Sensing

Deregulated Nutrient-Sensing

Supports broader discussions around energy efficiency and metabolic resilience.

Genomic Instability

Genomic Instability

Linked to antioxidant defence systems that matter for cellular stress protection.

Stem Cell Exhaustion

Stem Cell Exhaustion

Relevant to the cellular conditions that help regenerative capacity hold up over time.

Cellular Senescence

Cellular Senescence

Linked to antioxidant defence systems that matter for cellular stress protection.

Loss of Proteostasis

Loss of Proteostasis

Relevant to autophagy and the internal housekeeping processes cells rely on over time.

Altered Intercellular Communication

Altered Intercellular Communication

Studied in relation to cellular stress signalling and inflammatory pathway balance.

Why we're this fussy

We started Longevity Box because we were buying longevity supplements we couldn't verify, from brands that wouldn't show us anything. Everything we sell, we take. Every batch is tested before it goes near a customer, and if a batch doesn't pass, it doesn't ship.

— Max & Caroline

Methylene Blue: Optimise Cellular Energy and Cognitive Function

Methylene Blue offers a unique and powerful approach to supporting cellular energy production and cognitive function. This well-studied compound enhances mitochondrial function and acts as a potent antioxidant, helping you unlock your cellular potential. Discover the benefits of Methylene Blue and take a step towards enhanced vitality and mental clarity.

Before you start:

Methylene blue is a monoamine oxidase inhibitor, and that matters for one group of people in particular. If you take an SSRI, SNRI, MAOI or tricyclic antidepressant — or any other serotonergic medication, including tramadol, triptans for migraine, or St John's Wort — do not take methylene blue without speaking to your doctor or pharmacist first. It is also not suitable if you have G6PD deficiency, if you are pregnant or breastfeeding, or if you...

Ingredients

Active Ingredients: Methylene Blue, reverse osmosis distilled water

All of our products are free from binders, fillers, preservatives, or additives. We pride ourselves on this as it’s truly unique to the supplement industry. We invite you to look at the ingredient labels from every other supplement brand and tell us if you find another brand with the same zero-tolerance policy across its entire range :)

How to use and store

Allergy Advice: Free from gluten, wheat, diary, eggs, soya and nuts.

Suggested dosage: Twenty (20) drops contain 10mg of pharmaceutical-grade methylene blue. Mix in a large glass of water, or as recommended by your healthcare practitioner. Store in a cool, dry air-tight and dark place to avoid degradation.

Warning: Dietary supplements should not be a substitute for a balanced diet and healthy lifestyle This product should be stored out of the reach of children. Do not exceed the stated recommended daily dosage.

Taste and practicality: It tastes of very little — faintly metallic in water, gone in a second. It will stain a worktop, a shirt or a wooden spoon if you spill it, so measure over the sink. And keep the cap on properly: the dropper is the...

Purity tests

Ensuring maximum levels of safety, purity and quality is everything to us. We work with well-established suppliers that have regular factory inspections and are certified with CGMP and ISO to ensure the highest standards are consistently met. Test House: Certified Laboratories  

Delivery, Returns & Guarantee

60-Day Money Back Guarantee

Try it properly. Track how you feel. Keep what works.

Every Longevity Box product comes with a 60-day money back guarantee. If you don't notice a meaningful benefit within 60 days — or you simply change your mind — return it and we'll issue a full refund.

700-Day Purity Guarantee

Most brands promise purity at the point of manufacture. We guarantee it for the entire time you're using it.

Every Longevity Box product is covered by our 700-day purity guarantee — designed to ensure your supplements remain pure, reliable, and fit for purpose from the day they arrive to the day you finish them. That's the standard when you're playing the long game of healthspan.

Delivery

Fast fulfilment is part of product integrity. If you're building a...

Customer Reviews