how many drops in a mL?

10 drops = 5 Mg, 2 x day is the usual dose. The literature works in Mg rather than Ml.

There is no contact number for compass lab, although they state that a certificate of analysis is available on request. why not just publish it here?

You can simply send a message through Amazon but the certificate is also available in the pictures section.

237 ml is 8 oz. size in discription is 50 ml. is it one 237 ml bottle or five 50ml bottles?

It is one 237ml bottle. I ordered the 50ml bottle initially but realized I would need the larger bottle if I wanted to take Methylene Blue in the larger doses I need. I'm taking 20 drops twice a day at present so am going through the 50ml bottle in 3 - 4 weeks. Loving the results so far. Greatly helps my short term memory issues.

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COMPASS LABORATORY Methylene Blue Pharmaceutical Grade, USP Grade, Third-Party Tested Brain Health Dietary Supplement for Humans, No Formaldehyde, Made in USA (1% 237ml Bottle)

Product ID: 391752614

Details

Age Range (Description)
Adult
Brand
COMPASS
Color
Blue
Item Form
Liquid
Number of Items
1
Package Information
Bottle

🧠1% pure USP-grade methylene blue

🧪Third-party tested for potency & purity

🛡️No formaldehyde, antioxidant-rich formula

€ 300.67

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Description

🧠 Elevate your brain game with every drop — don’t get left behind!

CLEAN SAFE FORMULA - Free from formaldehyde and harmful additives for your brain’s health.
LAB TESTED CONFIDENCE - Third-party verification ensures pharmaceutical-grade quality you can trust.
SHARPER MIND EVERY DROP - Clinically pure 1% methylene blue supports cognitive clarity and memory retention.
POTENCY PRESERVED IN GLASS - Premium glass bottle packaging locks in freshness and prevents degradation.
MADE IN THE USA TRUSTED WORLDWIDE - Crafted under strict USP standards for uncompromising quality.

This 1% pharmaceutical-grade methylene blue supplement, made in the USA and third-party tested, delivers a potent antioxidant formula designed to support brain health and memory. Packaged in a glass bottle to preserve purity, it contains no formaldehyde and meets USP standards, making it a trusted choice for cognitive enhancement.

Specifications

ASIN	B09JVXQRRP
ASIN	B09JVXQRRP
Age Range Description	Adult
Best Sellers Rank	#97,910 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #680 in Lab Chemicals
Brand Name	COMPASS LABORATORY
Color	Blue
Container Type	Bottle
Customer Reviews	4.6 4.6 out of 5 stars (104)
Date First Available	October 5, 2021
Global Trade Identification Number	00656043504328
Item Form	Liquid
Item model number	2021-1B
Manufacturer	Compass Laboratory
Manufacturer	Compass Laboratory
Manufacturer Part Number	2021-1B
Model Number	2021-1B
Number of Items	1
Package Dimensions	7.32 x 3.66 x 3.62 inches; 15.84 ounces
Package Size Name	1%
Primary Supplement Type	Methylene Blue
Product Benefits	Brain Health Support
Recommended Uses For Product	Travel
Special Ingredients	Methylene Blue
UPC	656043504328
Unit Count	8 Fluid Ounces

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 300.67

Duties & taxes included

In stock

Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Spain.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

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TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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