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Produktbeschreibungen
Pressestimmen
Michael L. Power and Jay Schulkin take a frankly Darwinian approach... The evolutionary account of obesity is a powerful one-indeed, almost too powerful. -- Elizabeth Colbert New Yorker 2009 Elbowing the weight-loss guides on 'health' bookshelves, is a spate of new, more diet-neutral books that track the sociology of obesity, including... The Evolution of Obesity. -- Mandy Katz New York Times 2009 Goes far beyond anything else that is available on obesity... Power and Schulkin deserve much credit for their bold attempt to combine evolutionary and reductionist explanations, and for their unflinching acknowledgment of complexity. Nature 2009 An excellent and comprehensive explanation for the increased incidence of obesity... In summary, this informative and easily read book is an important companion for students, fellows, and clinicians who wish to understand the causes of the obesity epidemic and how obesity might lead to metabolic disease. New England Journal of Medicine 2009 This will be an extremely useful introduction for graduate and undergraduate students and for mainstream researchers to set the wealth of endocrine and metabolic data connected with obesity into a wider framework of understanding. -- John Speakman Trends in Endocrinology and Metabolism 2010
Kurzbeschreibung
In this sweeping exploration of the relatively recent obesity epidemic, Michael L. Power and Jay Schulkin probe evolutionary biology, history, physiology, and medical science to uncover the causes of our growing girth. The unexpected answer? Our own evolutionary success. For most of the past few million years, our evolutionary ancestors' survival depended on being able to consume as much as possible when food was available and to store the excess energy for periods when it was scarce. In the developed world today, high-calorie foods are readily obtainable, yet the propensity to store fat is part of our species' heritage, leaving an increasing number of the world's people vulnerable to obesity. In an environment of abundant food, we are anatomically, physiologically, metabolically, and behaviorally programmed in a way that makes it difficult for us to avoid gaining weight. Power and Schulkin's engagingly argued book draws on popular examples and sound science to explain our expanding waistlines and to discuss the consequences of being overweight for different demographic groups. They review the various studies of human and animal fat use and storage, including those that examine fat deposition and metabolism in men and women; chronicle cultural differences in food procurement, preparation, and consumption; and consider the influence of sedentary occupations and lifestyles. A compelling and comprehensive examination of the causes and consequences of the obesity epidemic, The Evolution of Obesity offers fascinating insights into the question, Why are we getting fatter?
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2 Rezensionen
Good as first reading on the subject
21. Mai 2012
Format:Gebundene Ausgabe|Von Amazon bestätigter Kauf
The book is well written and covers the subject quite extensively. It is sometimes repetitive but reading is never boring. If you never read anything on the subject of Evolution of Obesity, it will bring you close to the current knowledge on this fast changing subject. However, if you have a more academic interest on the theme and already read review papers, it is unlikely that it will add much to your current knowledge. It may call your attention to different approaches to the subject that you were not aware of and that is good anyway.
1 von 3 Kunden fanden die folgende Rezension hilfreich
A Needed Reality Check on Obesity
12. Februar 2012
Format:Gebundene Ausgabe|Von Amazon bestätigter Kauf
This book is a sobering, but much needed, overview of the complexity of the obesity issue, a public health issue that has recently acquired prominence. Although it does not appear to have been written for a general audience, it contains numerous insights on appetite, appetite, meals, and their genetic, biochemical, and social components and origins. It you are interested in a deeper understanding of obesity, the reward is worth the effort.
As examples of the insights in "The Evolution of Obesity", I would cite two that I found particularly informative. First, the biochemical signals involved in appetite and fat storage (e.g., insulin and leptin) are active and play important roles in systems other than metabolism. Recognition of this is very important, because it implies that it is extremely unlikely that a "magic bullet" will be found to treat obesity. Second, even a relatively lean person has sufficient energy stored as fat to satisfy basic requirements for about a month! From this point of view, excess fat is clearly maladaptive, and is associated with a state of chronic internal inflammation. The human body does not appear to have a way to recognize and dispose of excess fat (adipose tissue). Carbohydrate and fat calories consumed are either used directly or stored. There is apparently no way to directly shrink adipose tissue other than through the usual metabolic pathways. It seems to me that this supports the author's concept that humanity evolved in a calorically-limited environment, but now that there is virtually unlimited access to high energy density foods, the metabolic system is unable to effectively cope with it.
One aspect of obesity and metabolism that the authors do not address but I wish they would have is the question of mass and energy with respect to food and adipose tissue. Basically, the issue is that adipose tissue and obesity are characterized by weight (i.e., in terms of mass), but foods are characterized by calories (i.e., in terms of energy). The basis for the interchangeability of these terms is assumed, but the discourse on obesity would benefit from a clear explanation for it. I think I can guess why this is done, namely, a mass balance for metabolism (mass of food in = change in body mass + mass of metabolites out) would be very difficult to measure.
The book makes it clear that human metabolism is exceedingly complex, and that we are a very long way from a detailed understanding of it. This situation will undoubtedly disappoint and frustrate the food police, since it will be impossible to find a single villain on which obesity can be conveniently blamed.
As examples of the insights in "The Evolution of Obesity", I would cite two that I found particularly informative. First, the biochemical signals involved in appetite and fat storage (e.g., insulin and leptin) are active and play important roles in systems other than metabolism. Recognition of this is very important, because it implies that it is extremely unlikely that a "magic bullet" will be found to treat obesity. Second, even a relatively lean person has sufficient energy stored as fat to satisfy basic requirements for about a month! From this point of view, excess fat is clearly maladaptive, and is associated with a state of chronic internal inflammation. The human body does not appear to have a way to recognize and dispose of excess fat (adipose tissue). Carbohydrate and fat calories consumed are either used directly or stored. There is apparently no way to directly shrink adipose tissue other than through the usual metabolic pathways. It seems to me that this supports the author's concept that humanity evolved in a calorically-limited environment, but now that there is virtually unlimited access to high energy density foods, the metabolic system is unable to effectively cope with it.
One aspect of obesity and metabolism that the authors do not address but I wish they would have is the question of mass and energy with respect to food and adipose tissue. Basically, the issue is that adipose tissue and obesity are characterized by weight (i.e., in terms of mass), but foods are characterized by calories (i.e., in terms of energy). The basis for the interchangeability of these terms is assumed, but the discourse on obesity would benefit from a clear explanation for it. I think I can guess why this is done, namely, a mass balance for metabolism (mass of food in = change in body mass + mass of metabolites out) would be very difficult to measure.
The book makes it clear that human metabolism is exceedingly complex, and that we are a very long way from a detailed understanding of it. This situation will undoubtedly disappoint and frustrate the food police, since it will be impossible to find a single villain on which obesity can be conveniently blamed.
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