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CZTL Review: Methylene Blue Powder
A Shopify store that sells methylene blue powder in sizes from 1 g to 50 g and ships to several countries.
Before you buy: the FDA has not approved methylene blue powders sold online. It can interact with some antidepressants, so check with a doctor first. Our links are affiliate links.
Products
Ultra High Purity Methylene Blue Powder
From $30.00 per 1 g
- 1 g $30, 5 g $70, 10 g $120, 20 g $230
- Says >99.99% purity, verified by a US ISO/IEC 17025 accredited lab
- All sizes showed as sold out when we checked, so confirm stock
USP Methylene Blue Powder, 50 g
$500.00
- Listed as USP grade
- Shows as sold out at the time we checked
At a glance
| Feature | Detail |
|---|---|
| Format | Powder only |
| Testing | States a US ISO 17025 lab verifies purity. No Certificate of Analysis is linked on the page we read |
| Ships to | US, UK, Canada, Australia and the EU |
| Payment | Major cards, Apple Pay, Google Pay and PayPal |
| Address | Not stated on the pages we read |
| Intended use | Not stated |
What to check first
- Ask for the Certificate of Analysis for your batch, because none is linked.
- Powder is easy to measure wrongly and stains heavily. We do not give preparation or dosing advice.
- Stock changes often, so check availability and the live price.
Prices last checked in October 2026.