What if the key to better health was a 100-year-old industrial dye?

Sounds insane? Science says otherwise.

Meet methylene blue—a compound that started as a textile dye, stumbled into medicine, and never quite left. It has been used for everything from treating malaria to reversing cyanide poisoning, and more recently, researchers are uncovering its potential benefits for mitochondrial function, cognitive performance, and cellular resilience. But how did a simple blue dye become such a critical player in human health? And why has modern science only recently begun to appreciate its full potential?

In Methylene Blue for Humans, Bennett Hale takes a deep dive into the strange, surprising, and often misunderstood story of this molecule. This book explores the intersection of medical history, bioenergetics, neuroscience, and longevity research, separating facts from myths while uncovering how methylene blue might influence everything from brain fog to aging at the cellular level.

• Your mitochondria are in charge—why these microscopic power plants dictate how much energy you have, how fast you age, and even how sharp your mind stays
• The mitochondria-methylene blue connection—how this molecule helps keep the electron transport chain running smoothly and why that matters for everything from fatigue to neurodegenerative disease
• Brain fog, mood swings, and cognitive decline—how methylene blue interacts with neurotransmitters like serotonin and dopamine, and what that means for focus, memory, and mental health
• Aging, oxidative stress, and free radicals—the real story behind why we get older and how methylene blue might help mitigate the cellular wear and tear of time
• From malaria to mitochondria—why methylene blue was one of the earliest medical breakthroughs, then faded into obscurity, only to resurface as a powerful tool in biohacking and longevity research
• The surprising medical applications—how doctors still use methylene blue today for everything from sepsis treatment to neuroprotection and what that could mean for future therapies
• How to approach it responsibly—what science actually says about safe usage, proper dosing, and the most common misconceptions (including whether or not it will turn you blue—spoiler: probably not, but let’s be smart about it)

This isn’t a hype-fueled health trend or a miracle cure—it’s a molecule with over a century of scientific research behind it, now being re-examined in the context of biohacking, cognitive performance, and cellular aging. By the end of this book, you’ll understand not only what methylene blue does, but also why it was ignored for so long, how it’s making a comeback, and whether or not it deserves a place in the future of medicine.

Methylene blue isn’t new. It isn’t trendy. But it just might be one of the most important molecules you’ve never paid attention to. Modern medicine is finally catching up to what scientists suspected over a century ago: this simple blue compound has the potential to improve energy production, protect the brain, and influence how we age. The question is—what are we going to do with that knowledge?

A tiny drop of blue has been making waves in medicine for over a century—maybe it’s time you found out why.