Methylene Blue dosage calculator
A 1% solution is 10 mg/ml, and a standard dropper gives roughly 0.5 mg per drop. The calculator tunes your dose in drops and milligrams to your body weight and goal — and screens for safety before it shows a number.
Dosage by body weight
General Cognitive Support
Drops scale with weight inside the safe band for this goal — capped so it never exceeds 20 drops (10 mg).
Cobalt = recommended drops · gold = closest to your weight, once entered above.
How a 1% solution converts
Drop size varies with the dropper, temperature and technique, so treat every figure as a close estimate rather than an exact measure.
Typical dose range by goal
The band a 50–100 kg adult lands in. Your exact figure comes from the calculator above. Capped at 20 drops (10 mg).
Five simple steps
Start low
Begin with 1–2 drops and give yourself a few days at each level before adjusting. There’s no rush — consistency matters more than amount.
Take it earlier in the day
Morning or early afternoon tends to suit most people best. Many find later in the day less ideal for winding down.
Water or straight
Add your drops to a glass of water, or place them directly under the tongue. Either works — water is the gentler introduction.
Keep it consistent
A steady routine, taken on the days that suit you, gives the clearest sense of how it works for you over time.
Store it well
Cool, dry, out of direct sunlight, tightly sealed. The cobalt glass protects the solution from light — keep it that way.
A note on safety
Methylene blue can interact with some medications — particularly certain antidepressants and other serotonergic medicines. If you take any prescription medication, are pregnant or breastfeeding, or have an existing health condition, speak to a healthcare professional before use. This page is general information, not medical advice, and the MHRA has not evaluated any statements about this product.
Ready when you are
UK-made, USP-grade, Eurofins-tested methylene blue 1% in cobalt glass.
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