Meraki Blu USP Grade Methylene Blue 150mg

What It Is

Methylene blue is a synthetic compound first created in 1876 as a textile dye. Within a few decades, doctors discovered it also had biological activity — and by the early 1900s it was being used in medicine. Today, USP grade means it meets the U.S. Pharmacopeia's purity standard for pharmaceutical-grade material, the same quality bar used for the injectable form of methylene blue that hospitals keep on hand.

This bottle contains 150mg of USP (pharmaceutical) grade methylene blue in a 30ml bottle with a 1ml dropper, lab-tested for purity and heavy metals.

The Science: How It Actually Works

Methylene blue's biological activity comes down to one property: it's redox-active, meaning it can pick up and hand off electrons.

Mitochondrial electron shuttling. In cell and animal studies, methylene blue can accept electrons from NADH and deliver them directly to cytochrome c, effectively creating a detour around three of the normal steps in the mitochondrial electron transport chain (Complexes I–III). This is the mechanism behind most of the "cellular energy" and "mitochondrial support" interest in the compound.

Mild MAO inhibition. Methylene blue is also a monoamine oxidase inhibitor, an enzyme involved in breaking down neurotransmitters like serotonin and dopamine. This is well-documented in the research — and it's also the reason for the most important safety warning below.

Its one FDA-approved use. The clearest, best-established medical use of methylene blue is treating acquired methemoglobinemia, a condition where blood loses its normal ability to carry oxygen. Given by injection, methylene blue restores hemoglobin's oxygen-carrying capacity. This is the use with the strongest, most direct clinical evidence behind it.

What's still being studied. The interest in low-dose oral methylene blue for cognitive performance, energy, and longevity is real and growing — but it's important to be direct about where the evidence currently stands: most of it comes from cell and animal research, with human studies still early-stage and limited. We're not going to tell you it's a proven cognitive enhancer, because the science isn't there yet. What we can tell you is that the underlying mechanisms (electron shuttling, antioxidant activity, MAO inhibition) are real, well-studied biochemistry — which is exactly why it keeps showing up in ongoing research.

Important Safety Information — Please Read

Methylene blue is a real, pharmacologically active compound, not a casual ingredient. Please take the following seriously:

Do not use if you take serotonergic medications (SSRIs, SNRIs, MAOIs, bupropion, tricyclic antidepressants, or similar). Combining methylene blue with these can cause serotonin syndrome, a potentially life-threatening reaction. Ask your doctor before use if you're on any antidepressant or mood medication.

Do not use if you have G6PD deficiency. Methylene blue can trigger hemolytic anemia in people with this condition.

Not for use during pregnancy or nursing, or by anyone under 18.

It stains. Methylene blue will stain skin, clothing, surfaces, and dental work on contact. Wash spills immediately and keep away from eyes.

This product is intended for research purposes. It has not been evaluated by the FDA and is not intended to diagnose, treat, cure, or prevent any disease. Talk to your doctor before adding it to your routine, especially if you take any medication.