Can methylene blue extend lifespan?

Methylene blue has been found to potentially extend the lifespan of some lower organisms, but its use in humans is more controversial. Andrew Huberman and his guest discuss the practice of ingesting methylene blue, noting that it can stain the body and expressing skepticism about its safety for human use. They imply that while the substance has specific uses in research, such as in studying the blood-brain barrier, the idea of consuming it for health benefits might not be advisable 1.