You have to understand that the entire premise of the book is that n = 1. There's nothing scientific about it. It's not billed as such, and it is silly to expect it to be so. Sure, Ferriss dips into talking about the science of the body at times, and often tries to couch his forays in it, but the reason it is interesting/amusing is that he tries out some of these ridiculous ideas to see if they actually work.
It should be viewed as a jumping-off point, not an authoritative source.
You have to understand that the entire premise of the book is that n = 1. There's nothing scientific about it. It's not billed as such, and it is silly to expect it to be so. Sure, Ferriss dips into talking about the science of the body at times, and often tries to couch his forays in it, but the reason it is interesting/amusing is that he tries out some of these ridiculous ideas to see if they actually work.
It should be viewed as a jumping-off point, not an authoritative source.