Foods that Harm, Foods that Heal

This is the ultimate reference guide when it comes to food and food-related health.  It's not a cookbook although every cook would love it, it's not a diet book although there's diet advice to be had ... you could almost call an encyclopedia of food and health with a New Zealand & Australian perspective.  My copy is one from the original print run by Readers Digest although it has been updated and reprinted since and I believe it's sold over 7 million copies worldwide. 
It is presented as an A-Z and so you can look up the food  or medical condition that you're interested in very easily.  It's practical, accessible with illustrations and is packed full of information.  Some examples include:The information is based on inIt's been compiled with contributions from more than 350 experts and many New Zealand & Australian organisations.

• A list of drinks comparing their caffeine content
• An article on how food and nutrition can affect cancer
• A section on sleep and your diet
• The benefits and drawbacks of hundreds of foods
• Guidance on foods that may worsen or lessen the effects of lots of
  conditions from arthritis and sinusitis to psoriasis
• A discussion on sports nutrition.

Now I know there are many specialist books on each of these
topics (not to mention Wikipedia) but this is a good generalist reference book
to keep on hand and it's presented in such a way that you can just pick it up
from time to time and browse through it picking up something new each
time.

The best price I've found for the current version is on Fishpond - click on the book cover above for more information.  It is also available on The Nile website - link to the website below.