You: Staying Young: The Owner's Manual for Extending Your Warranty:Amazon:Books
I've read this book cover to cover a couple of times and I keep it out as a handy reference. There's no other book that explains the technicalities and inner workings of the human body quite like this one. It's not just an eat right stay young book it talks about brain activity, cell division, cancer, self-repair & wound healing and many other things.
I know people that are intimidated by the book because once they've read it and know what they should do, they feel like a failure and an idiot for not changing their habits, i.e, they learn & know the correct way but disregard it anyway.