The book does not restrict itself to an evolutionary discourse. The biggest and the most remarkable strength of this work, therefore, is its comprehensive and well-researched second half that proceeds with a discussion of human physiology, touching upon the various complex processes and mechanisms that govern our food intake, its break-down into energy, and its final consumption.
By talking about relatively less understood subjects, like leptin’s role in controlling our urge to eat, the authors have tried to bequeath to their readers a much better understanding of how their bodies really work. Unfortunately, the book’s biggest failing is that while it furnishes us with a remarkable body of latest scientific research, it does not proceed to recommend possible remedial actions and strategies that we can adopt to halt our evolutionary march towards obesity! (Power & Schulkin, 2009)
We cannot forget sugar in the process, as it is one of our primary sources of glucose – a fact we cannot afford to ignore when we consider the pronouncement by Dr. Milton of Berkeley’s stating that our brains are drinking glucose 24 hours a day to meet their energy requirements. The writers are right to point out that while our ancestors had access to “good sources” of glucose in the form of fruits, berries and edible grains, our modern-day sources of glucose intake are not so well-diversified. For example, at the beginning of the industrial revolution, per capita sugar consumption in Britain was 7.5 lbs.; compared to that, modern-day per capita sugar consumption in the United States is 150 lbs. (Power & Schulkin, 2009) (Lemonick, 2004)
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