Health Book?

I want to learn about health/medicine.  Unsurprisingly, all the books I have seen so far are completely useless crap.  They contain anecdotal babbling, correlations with no evidence whether it is causal, and recommendations with no explanation why.  They don't contain any biochemistry or any deep explanation of how the body actually works.  If anyone knows of a health/medicine book that isn't crap, please let me know.  And I will keep looking myself.

you can look into traditional herbalism books, recipes on native american medicine, chinese medicine and indian medican (Ayuverda) but a lot of them believe in semi mysticism...

I chose these books to start:

Organic Chemistry I For Dummies
Biochemistry For Dummies
Lippincott Illustrated Reviews: Biochemistry