Methylene Blue_
Also known as methylthioninium chloride
A low-dose blue compound taken for focus and energy.
Common vial size is what vendors typically sell, not a recommendation. Enter your own vial in the calculator.
What is Methylene Blue?
Plain language first. The technical label stays, but it never stands alone.Overview
Methylene blue is a century-old synthetic dye, not a peptide, that can shuttle electrons inside cells' energy machinery. In plain terms: at low doses it helps mitochondria make energy more efficiently, which is why it is taken for focus and energy. It famously turns urine blue-green, which is harmless.
What it's used for
People take it for sharper focus and steadier energy. It works quickly.
How does Methylene Blue work?
What it does in the body, and where.Methylene blue is a synthetic dye from 1876, and one of the oldest synthetic drugs still in use. It is not a peptide.
- 01It can carry electrons inside mitochondriaBypassing damaged steps in the chain that cells use to make energy.
- 02The dose direction matters enormouslyAt low doses it assists energy production. At high doses it does the opposite and becomes an oxidant. This reversal is well documented and it is why more is not better.
- 03It is an MAO inhibitorWhich means a genuine risk of serotonin syndrome when combined with SSRIs, SNRIs, or other serotonergic drugs. This is the most important practical fact about it.
- 04It stains everything blueIncluding urine, and skin if spilled.
A schematic of the compound's mechanism, not a diagnostic image.
What else is it used for?
Each use below carries its own evidence level. Approved means regulators have cleared it for that purpose. Investigational means it is in trials. Early research means it is being studied and is not established.
- Methemoglobinemia, a blood disorder, which is its actual approved useFDA-approved
- A surgical dye to mark tissue during operationsFDA-approved
- Dangerously low blood pressure in septic shock, used in hospitalsClinical use
- Focus, energy, and brain function at low doses, which is why most people take itEarly research
How much, and do you cycle it?
The range, and whether you take breaks.5 up to 15 mg per day, daily. No established scheduleNo range
No published study has established how long to take this or whether a break is needed. Schedules quoted online come from vendors and forums, and different sources disagree.
How do I dose and price it?
Enter your vial and your dose. Pick a mix. We show the draw and the cost.The vial holds a fixed amount of drug. Adding more water does not make more drug, it just spreads it thinner, so you draw a bigger number on the syringe for the same dose.
Methylene Blue is not injected
It is taken by mouth (oral).
How do you store it?
Before mixing, and after.Room temperature. Cool, dry, out of light.
Methylene Blue is taken as a pill or capsule. Keep it in its original container at room temperature, away from heat, humidity, and direct sun. No fridge or mixing needed. Check the expiration date on the bottle.
What are the side effects and cautions?
Known cautions and warnings for this compound.Who should avoid it
- Taking an SSRI or SNRI antidepressant, or any other serotonin-affecting medicine, because the combination can cause a dangerous reaction called serotonin syndrome. The FDA has warned about this specifically
- G6PD deficiency, an inherited condition where it can destroy red blood cells
- Pregnancy
- Severe kidney impairment
Stop and get help
- Agitation, confusion, fever, muscle twitching, sweating, or a racing heart, which can signal serotonin syndrome and needs urgent care
- Shortness of breath, or bluish lips or fingertips
- Unusual tiredness with pale skin, which can signal red blood cell breakdown
- Signs of an allergic reaction such as face or throat swelling, hives, or trouble breathing
Common effects
- Blue-green urine, which is harmless and expected
- Mild nausea
- Headache
- Staining of the mouth and tongue with oral use
- At higher doses the risks rise sharply, which is why low-dose use is the norm
Where this page says nothing is established, that means nobody has studied it, not that a compound is safe.
Is Methylene Blue approved?
And where the numbers on this page come from.Yes. Sold over the counter.
No prescription required, but evidence quality varies by product and country.
- DoseFrom product labeling and published use.
- Vial sizeFrom what vendors typically list; not a recommendation.
- Reviewed22 July 2026
What else is like Methylene Blue?
Others in Brain, mood and sleep, side by side.If you're weighing Methylene Blue, it's worth reading Semax, Selank, and N-Acetyl Semax Amidate in the same class.
A low-dose blue compound taken for focus and energy.
- Dose
- 5 up to 15 mg per day
- How often
- Daily
A nasal spray for sharper focus, memory, and mental clarity.
- Dose
- 0.2 up to 0.6 mg per day
- How often
- 1-2x daily
A nasal spray that eases anxiety while keeping you clear-headed.
- Dose
- 0.25 up to 0.5 mg per day
- How often
- 1-2x daily
A longer-lasting version of Semax for focus and memory.
- Dose
- 0.2 up to 0.4 mg per day
- How often
- 1-2x daily
10What these words mean
Show glossary +
What these words mean
- Titrate
- Starting at a low dose and increasing it slowly over time so your body adjusts and side effects stay mild.
- Subcutaneous
- An injection just under the skin, into the fat layer, usually with a short, thin insulin needle.
- Intramuscular (IM)
- An injection into a muscle, using a longer needle.
- Reconstitution
- Mixing a powdered peptide with liquid (bacteriostatic water) so it can be drawn into a syringe.
- Bacteriostatic water
- Sterile water with a tiny amount of preservative, used to mix powdered peptides.
- Concentration
- How strong the mixed peptide is, in milligrams per milliliter (mg/mL). More water makes it weaker; less water makes it stronger.
- Units (on the syringe)
- The marks on an insulin syringe. 100 units equals 1 mL. They measure how much liquid you draw, not the dose in milligrams.
- mcg and mg
- Units of dose. 1 milligram (mg) equals 1,000 micrograms (mcg).
- GLP-1
- A natural gut hormone that lowers appetite and blood sugar. Drugs that copy it, like semaglutide, are used for weight loss.
- Growth hormone secretagogue
- A compound that nudges your body to release more of its own growth hormone, rather than injecting the hormone itself.
- Half-life
- How long a compound stays active in your body. A longer half-life means you inject less often.
- Peptide vs small molecule
- A peptide is a short chain of amino acids. A few items here (like MK-677 or methylene blue) are small molecules, not true peptides, but people use them the same way.
- Research only
- No approved dose or use in people. Sold for research and not reviewed by the FDA for safety or quality.
- Investigational
- Still being tested in clinical trials and not yet approved or legally sold for general use.
- Banned in drug-tested sport
- Prohibited by the World Anti-Doping Agency (WADA); using it can disqualify a competing athlete.
Last reviewed 22 July 2026