John Nichols 
Nutrition and Science [PDF ebook] 
A Darwinian Perspective on Nutritional Medicine

This book offers a completely up-to-date summary of nutritional medicine as it applies to frontline medical professionals, medical students and the interested layperson. Newspapers often give contradictory and confusing reports on issues such as alcohol intake, dietary sugars versus fats and the value (or lack thereof) of taking supplements. In addition, many GPs are as confused as their patients on these matters as they get very little education in nutrition either at medical school or afterwards. However, nutritional medicine is not really that confusing. There is some disagreement among experts, but there is a consensus on the most important issues, albeit with slight variations. The book summarises these generally agreed opinions, but explains where there are differences of opinion, detailing the reasons for these.