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 …

[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 …

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 …

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 …

Evolutionary origins of the obesity epidemic: natural selection of thrifty genes or genetic drift following predation release?

AM Prentice, BJ Hennig, AJ Fulford - International journal of obesity, 2008 - nature.com
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 …

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 …

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 …

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 …

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 …

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 …