We value our partnerships with independent boutiques and specialty shops. To protect our brand and our retailers, Resale of this product on Amazon US, Walmart US is strictly prohibited. About this item: Peace of Mind: Our pharmaceutical-grade Methylene Blue is proudly USP grade. By adhering to these qualifications, our Methylene Blue conforms to the rigorous standards established by the USP for identity, purity, strength, and performance. High Purity: Our Methylene Blue undergoes rigorous testing by third-party labs to ensure it is free from heavy metals, microorganisms, and other impurities. Our commitment allows you to have complete confidence in the quality of our Methylene Blue. Sharp Minds: Methylene Blue for humans is a powerful antioxidant that may offer a range of health benefits. It may support an increase in blood flow and oxygen to the brain, improve memory, and even contribute to increased energy levels.