Fasting may contribute to brain cleansing by activating the glymphatic system or affecting xenobiotic metabolism.

“And I would say that there might be some aspect of fasting because, of course, in all these studies the animals were eating less when they sleep. And so then the question is, "How much of fasting contributed to cleansing the brain?" You're talking about the glymphatic system being activated. The glymphatic system. That would be super interesting. Yeah. That would be very interesting. So that's also another reason why we think that, well, maybe fasting is actually improving sleep by affecting maybe the xenobiotic metabolism or something else.”