The evolution of body fatness: trading off disease and predation risk
JR Speakman - Journal of Experimental Biology, 2018 - journals.biologists.com
Human obesity has a large genetic component, yet has many serious negative
consequences. How this state of affairs has evolved has generated wide debate. The thrifty …
consequences. How this state of affairs has evolved has generated wide debate. The thrifty …
[HTML][HTML] A nonadaptive scenario explaining the genetic predisposition to obesity: the “predation release” hypothesis
JR Speakman - Cell metabolism, 2007 - cell.com
The" thrifty gene hypothesis" suggests we evolved genes for efficient food collection and fat
deposition to survive periods of famine and that now that food is continuously available …
deposition to survive periods of famine and that now that food is continuously available …
If body fatness is under physiological regulation, then how come we have an obesity epidemic?
JR Speakman - Physiology, 2014 - journals.physiology.org
Life involves a continuous use of energy, but food intake, which supplies that energy, is
episodic. Feeding is switched on and off by a complex array of predominantly gut-derived …
episodic. Feeding is switched on and off by a complex array of predominantly gut-derived …
Thrifty genes for obesity, an attractive but flawed idea, and an alternative perspective: the 'drifty gene'hypothesis
JR Speakman - International journal of obesity, 2008 - nature.com
Almost 50 years ago Neel proposed a hypothesis to explain the prevalence of obesity and
diabetes in modern society—the 'thrifty gene'hypothesis. The fundamental basis of the …
diabetes in modern society—the 'thrifty gene'hypothesis. The fundamental basis of the …
Evolutionary origins of the obesity epidemic: natural selection of thrifty genes or genetic drift following predation release?
This article challenges Speakman's hypothesis that the modern genetic predisposition to
obesity has arisen through random genetic drift in the two million years following predation …
obesity has arisen through random genetic drift in the two million years following predation …
Fatness and fitness: exposing the logic of evolutionary explanations for obesity
AD Higginson, JM McNamara… - Proceedings of the …, 2016 - royalsocietypublishing.org
To explore the logic of evolutionary explanations of obesity we modelled food consumption
in an animal that minimizes mortality (starvation plus predation) by switching between …
in an animal that minimizes mortality (starvation plus predation) by switching between …
Evolutionary perspectives on the obesity epidemic: adaptive, maladaptive, and neutral viewpoints
JR Speakman - Annual review of nutrition, 2013 - annualreviews.org
The prevalence of obesity in modern societies has two major contributory factors—an
environmental change that has happened in historical times and a genetic predisposition …
environmental change that has happened in historical times and a genetic predisposition …
Analysis of positive selection at single nucleotide polymorphisms associated with body mass index does not support the “thrifty gene” hypothesis
G Wang, JR Speakman - Cell metabolism, 2016 - cell.com
The" thrifty gene hypothesis" suggests genetic susceptibility to obesity arises because of
positive selection for alleles that favored fat deposition and survival during famines. We used …
positive selection for alleles that favored fat deposition and survival during famines. We used …
On the evolutionary origins of obesity: a new hypothesis
D Sellayah, FR Cagampang, RD Cox - Endocrinology, 2014 - academic.oup.com
Obesity is an escalating threat of pandemic proportions, currently affecting billions of people
worldwide and exerting a devastating socioeconomic influence in industrialized countries …
worldwide and exerting a devastating socioeconomic influence in industrialized countries …
Obesity: an evolutionary context
JR Speakman, JK Elmquist - Life metabolism, 2022 - academic.oup.com
People completely lacking body fat (lipodystrophy/lipoatrophy) and those with severe
obesity both show profound metabolic and other health issues. Regulating levels of body fat …
obesity both show profound metabolic and other health issues. Regulating levels of body fat …