What does Methylene Blue do?

Industrial dye used medically. Clinical evidence is limited to surgical/ICU settings, not oral supplements.

Is Methylene Blue safe?

Methylene blue is an FDA-approved drug for specific medical conditions, not a dietary supplement — its sale as a supplement exists in a regulatory gray zone

Methylene Blue - Science-Based Research

What the Science Says

Methylene blue is a synthetic dye with a long history in medicine, primarily used in hospital settings. The provided research shows it can reduce post-surgical pain when injected locally, improve blood flow in the tiny vessels of critically ill patients with septic shock, and kill drug-resistant fungi and treat oral lesions when used as a photosensitizer with light therapy. These are all medical or procedural uses — not oral supplement uses.

What It Doesn't Do

No evidence from these studies that oral methylene blue supplements improve memory or cognition. No evidence it boosts mitochondrial function in healthy people. No proof it extends lifespan or reverses aging. The 'nootropic' marketing around oral MB is not supported by any of the provided clinical data. Improving microcirculation in septic shock patients does not mean it improves circulation in healthy adults.

Evidence-Based Benefits

Methylene blue is a synthetic dye with a long history in medicine, primarily used in hospital settings. The provided research shows it can reduce post-surgical pain when injected locally, improve blood flow in the tiny vessels of critically ill patients with septic shock, and kill drug-resistant fungi and treat oral lesions when used as a photosensitizer with light therapy. These are all medical or procedural uses — not oral supplement uses.

Weak Evidence

Effective at: No established oral supplement dose from provided studies

Source: auto-research

Absorption & Bioavailability

Unknown for oral supplementation — provided studies only used intravenous infusion or topical/local injection routes. Oral bioavailability data not present in provided papers.

Red Flags to Watch For

Methylene blue is an FDA-approved drug for specific medical conditions, not a dietary supplement — its sale as a supplement exists in a regulatory gray zone
Can cause serotonin syndrome when combined with serotonergic drugs (SSRIs, SNRIs, MAOIs) — a potentially life-threatening interaction
The clinical evidence provided is entirely from hospital/procedural settings (IV infusion, local injection, photodynamic therapy) — none supports oral supplementation for wellness
No established safe oral dose exists in the provided research data
Turns urine and skin blue/green — cosmetically alarming and may mask symptoms of other conditions
Most PubMed papers retrieved were about using methylene blue as an industrial dye or lab reagent, not as a human health supplement

Products Containing Methylene Blue

See how Methylene Blue is used in these analyzed products:

Time Labs Methylene Blue 120 Count

Supplement

4/10 Mostly Legit

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Research Sources

PubMed
NIH DSLD

Effective Dosage