Methylene Blue 1% Liquid — 4 oz | USP Grade

1% concentration = 10 mg/mL
4 fl oz / 118 mL
Approximately 1,180 mg methylene blue per bottle

NeuroBlue 1% Methylene Blue

4 fl oz (118 mL) of 1% methylene blue solution. Each mL contains 10 mg of methylene blue.

Made in the USA using USP-grade methylene blue and independently tested for identity, concentration and contaminants.

1% = 10 mg/mL
118 mL per bottle
Cobalt blue heavy wall glass bottle.
✨Free U.S. shipping

Pure and Safe: USP Grade Methylene Blue — 4oz Liquid Drops

NeuroBlue Methylene Blue Liquid Drops in a 4oz bottle — USP pharmaceutical-grade, third-party lab-tested Methylene Blue in our most popular mid-size format. Made in the USA in a facility held to the highest quality standards, so you know exactly what you're getting, every drop.

✨ Maximum Purity: UV-verified at 99.9–100.4% purity — pharmaceutical-grade quality you can trust.

🇺🇸 Made in the USA: Manufactured domestically with a proven track record of strength and consistency — about 85% of our customers come back for more.

🔒 Heavy Metal Free: Independently tested and certified free of heavy metals.

🔒 Formaldehyde Free: No formaldehyde, no harsh preservatives, no fillers — just clean, simple formulation.

🧴 Amber Glass Bottle: 4 fl oz (118mL) amber glass bottle with a built-in dropper for precise, mess-free dosing.

🔬 Precise, Reliable Dosing: Every 1mL (20 drops) delivers 10mg of 1% Methylene Blue — about 0.5mg per drop, so you always know exactly how much you're taking.

🌱 Easy Clean-up: Spills happen — lift stains fast with lemon juice, lime juice, or ascorbic acid.

Why choose the 4oz size? Twice the supply of our 2oz bottle at a better cost-per-mL, without committing to a bulk 8oz size — ideal for regular use.