I don't know. I experience this sometimes, too. I just thought I was more sensitive to caffeine now, but maybe there's more to it. Actually, I remember one day - a few weeks after really committing to this way of eating - a moment in the parking garage. I heard a noise, like a chirp, and my whole body froze, I got hot all over and felt huge energy, like I was ready to sprint if needed, and I could instantly hear every minute bit of sound in the whole area. So something has changed in regards to my attention span, but I think it's how it's meant to be. If we were too engaged in conversation to notice a twig snap in the woods behind us, we'd be extinct. Just a guess, I'm no expert. Hypervigilance is the norm for me now. I can only do one thing at a time, but I do it well. Great for phlebotomy!