In recent years, methylene blue has gained attention online as a so-called “biohacking” supplement touted to boost brain function, increase energy, and even fight aging. But before adding it to your wellness routine, it’s important to understand what it actually is—and what the science says.
Originally developed in the late 1800s, methylene blue is a synthetic dye with legitimate medical uses. It’s FDA-approved for treating methemoglobinemia, a rare blood disorder, and it’s also used in some surgical procedures and as a laboratory stain. In controlled medical settings, it can be life-saving.
However, a growing number of influencers and health forums now promote methylene blue as a nootropic (brain enhancer), antimicrobial, and mitochondrial booster. Some even claim it can treat long COVID, depression, or Alzheimer’s disease. These ideas stem from small-scale lab studies and animal research showing methylene blue’s potential to support cellular energy and act as an antioxidant.
But here’s the catch: these studies are preliminary and not meant to guide self-medication. Methylene blue is not approved as a dietary supplement in Canada or the U.S., and many products sold online are industrial-grade, not pharmaceutical-grade—which may contain dangerous contaminants. At higher doses, this substance can cause serotonin syndrome (a potentially fatal condition), interfere with medications, or damage red blood cells in people with G6PD deficiency.
In short, while methylene blue shows some intriguing therapeutic potential, it’s not a miracle cure. The buzz online often skips over the lack of long-term safety data, proper dosing studies, and clinical trials in humans.
Before considering any off-label use, especially something as chemically potent as methylene blue, it’s wise to speak with a healthcare professional. Natural health isn’t about chasing trends—it’s about informed, evidence-based decisions that support your whole-body wellness.
Thank you for reading this article on Methylene Blue. Want to learn more about how to optimizing your health and wellness? Book an appointment here with Dr. Liz Dalglish, ND, who focuses her practice on healing women in midlife optimize their gut, hormone & metabolic health!