Concentration
1% solution
The website now follows the physical label instead of the former 0.5% page title.
Inside the formula
The supplied bottle label states a 1% solution, 500mcg per drop and 10mg per full dropper. Those values now replace the conflicting 0.5% claim previously shown on this page.
Concentration
The website now follows the physical label instead of the former 0.5% page title.
Measurement
The label declares 500mcg per drop and 10mg per full dropper.
Safety
Liquid flexibility does not reduce methylene blue’s pharmacology or contraindications.


Human evidence · small acute study
The redox-active compound
USP-grade methylthioninium chloride · 1% solution
What it is: Methylene blue is a pharmacologically active, redox-cycling compound with established clinician-directed medical uses and experimental research in other settings.
Evidence context: A small acute human fMRI study reported changes in memory-related measures after a single dose. It does not establish an optimal wellness dose or safe long-term use.
The liquid format enables small measured amounts, but drop size can vary with technique and the product still carries serious interaction risks.
Every other label-listed ingredient
The supplied label states “no additives.” No additional active ingredient is presented on this page. Follow the bottle in hand for the complete ingredient statement.
The formulation rationale
Concentration + per-drop amount: The 1% statement is paired with 500mcg per drop so the liquid can be interpreted in actual amounts.
Drop + dropper scale: A full dropper is labeled as 10mg, providing a second reference point; count carefully and follow the physical label.
Flexible format + serious caution: Customizable measurement can also increase error risk. Medication screening matters before use.
Ingredient-profile image: Eternal Elixir media library. Image does not establish batch testing or regulatory approval.