I'll add to the sentiment here, though most have covered it. After reading his theories, I discovered that my friendly neighborhood roastery carries wet-processed, single-origin coffee and I've been using it at home in our espresso maker for morning lattes (so I'm not doing the whole protocol). About 80% of the time, my morning is brighter, happier, and more productive (gee, aren't I an addict?!). Sometimes, not as much or just less noticeable of a pick-me-up. I attribute this to natural variation in supply.

However. When I consume regular crap coffee? It's bad. Jitters, anxiety, unable to get full thoughts out of my mouth, acid reflux, and a weird empty tummy feeling for the rest of the day no matter how much I eat. These are the reasons I gave up coffee years ago, so as far as I'm concerned, Bulletproof Exec gave me my coffee back. Thank gawd.