Potentially the most important book on health and healthy life-longevity I've read. I've spent my entire life reading how green tea, coffee, red wine, a Mediterranean diet, exercise, baby aspirin, etc. are so very healthy without a clear underlining reasoning. Mangan has made a thorough case regarding iron intake. There is too much evidence to ignore that iron is an underlining cause - or at least a contributor - to disease, longevity, and possibly even appearance.