CZTL is the brand of USP grade Methylene Blue that we would recommend
Background
We receive product photos from members asking if the brand is reliable/safe. Unfortunately, there has been a rise in dubious MB brands of late - so we have tried to prepare a checklist to assist. It is not comprehensive, but it's a guide.
When it comes to Methylene Blue, not all Methylene Blue is equal. Cheap can be dangerous.
Questions to answer before purchase
Questions | Answers/More Information |
Does the brand provide a third party lab analysis of Class 1 impurities AT LEAST (i.e. Cadmium, Lead, Mercury, Arsenic)? | These are highly carcinogenic and need to be controlled. |
Is the third party test done in Europe or North America? Can the 3rd party be contacted if required? | Fake tests are very common - so a reputed third party lab is a must have |
| Are the 3rd party test results transparent or are they vague? | Brands play with words to give users a false sense of security. Typical words include, complies/all OK/under threshold - etc. |
Are there any reviews on neutral sites like Trust Pilot (etc)? | Amazon reviews may have a lot of paid/questionable reviews |
How long has the brand been in the market? | Minimum required is 3 years. Most questionable brands launched in later half of 2023 (onwards) |
Does the pricing make sense commercially? | If you are getting 10g for 20 USD it may seem cheap but it definitely ain't pharma grade. Genuine pharma grade starts around 8 USD/g and above |
Are you paying for the product or the packaging? | Always remember to pay for the product and not beautiful packaging |
Who is recommending the brand? | Are there any trustworthy sources recommending the brands. |
Where is it made? | Pharma MB is primarily made in France, UK, India, US and some in Australia |
Are there any reliable agencies/experts recommending the brand? | |
| The heavy metal analysis is in percentage | This is a very common tactic where the values in the reports are in percentage and not ppm. You cannot compare ppm with percentages. |
Checklist
Item
Description | |
Packaging | Should be opaque - light damages Methylene Blue |
Heavy Metal - Arsenic | Less than 8 ppm or absent (equal to 8 ppm is not USP) |
Heavy Metal - Lead | Less than 1 ppm or absent |
Heavy Metal - Cadmium | Less than 1 ppm or absent |
Heavy Metal - Mercury | Less than 1 ppm or absent |
To convert powder values to 1% liquid; divide the value by 100 (for example if powder is 1 ppm; in 1% liquid form it become 0.01 ppm)
Commercials
- Non USP grade MB is available for USD ~50/kg - it typically is brick red in color when in powder form
- Cheapest USP pharma grade MB is for USD ~7000/kg - that is 7 USD/g - it is typically bronze (dark green with lustre) when in powder form
Above is not a comprehensive list. It is a guide for you to make a more informed decision. It is easier to distinguish between USP and non USP when in powder form - in liquid form there may be no visible difference to the naked eye.
At this point based on over 6 years of experience, feedback and using them CZTL is the only brand we feel comfortable in endorsing.
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Which brand of Methylene Blue should I purchase?
Background We receive product photos from members asking if the brand is reliable/safe. Unfortunately, there has been a rise in dubious MB brands of late - so we have tried to prepare a checklist to assist. It is not comprehensive, but it's a guide. When