CZTL Methylene Blue There is a lot of confusion out there on procuring high-quality safe Methylene Blue and preparing the solution. To solve that problem we are providing prepared MB solution from USP Grade Methylene Blue. This listing is for 4 bottles of high purity CZTL Methylene Blue with 0.1% concentration. The solution is prepared using USP grade high purity Methylene Blue. We also ship single bottles which you can find here https://www.amazon.in/gp/product/B08HNHJRQS CZTL MB Cure is now rebranded to CZTL MB Ultra Pure