On the origin of obesity: identifying the biological, environmental and cultural drivers of genetic risk among human populations
Abstract
Summary: Genetic predisposition to obesity presents a paradox: how do genetic variants with a detrimental impact on human health persist through evolutionary time? Numerous hypotheses, such as the thrifty genotype hypothesis, attempt to explain this phenomenon yet fail to provide a justification for the modern obesity epidemic. In this critical review, we appraise existing theories explaining the evolutionary origins of obesity and explore novel biological and sociocultural agents of evolutionary change to help explain the modern‐day distribution of obesity‐predisposing variants. Genetic drift, acting as a form of ‘blind justice,’ may randomly affect allele frequencies across generations while gene pleiotropy and adaptations to diverse environments may explain the rise and subsequent selection of obesity risk alleles. As an adaptive response, epigenetic regulation of gene expression may impact the manifestation of genetic predisposition to obesity. Finally, exposure to malnutrition and disease epidemics in the wake of oppressive social systems, culturally mediated notions of attractiveness and desirability, and diverse mating systems may play a role in shaping the human genome. As an important first step towards the identification of important drivers of obesity gene evolution, this review may inform empirical research focused on testing evolutionary theories by way of population genetics and mathematical modelling.
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In two meta-analyses of 11 observational and randomized studies, no difference was found in major postoperative complications between ERAS and standard care in bariatric surgery (OR 0.94, 95% CI 0.58 to 1.51).
“Two meta-analyses of 11 observational and randomized studies addressed the comparative effect of ERAS versus standard care in bariatric surgery [1, 2, 65, 66] No differences were found in major (OR 0.94, 95% CI 0.58 to 1.51) and minor postoperative complications (OR 0.88, 95% CI 0.55 to 1.41), and mortality (RR 0.4, 95% CI 0.1 to 2.2).”
In two meta-analyses of 11 observational and randomized studies, no difference was found in minor postoperative complications between ERAS and standard care in bariatric surgery (OR 0.88, 95% CI 0.55 to 1.41).
“Two meta-analyses of 11 observational and randomized studies addressed the comparative effect of ERAS versus standard care in bariatric surgery [1, 2, 65, 66] No differences were found in major (OR 0.94, 95% CI 0.58 to 1.51) and minor postoperative complications (OR 0.88, 95% CI 0.55 to 1.41), and mortality (RR 0.4, 95% CI 0.1 to 2.2).”
In two meta-analyses of 11 observational and randomized studies, no difference was found in mortality between ERAS and standard care in bariatric surgery (RR 0.4, 95% CI 0.1 to 2.2).
“Two meta-analyses of 11 observational and randomized studies addressed the comparative effect of ERAS versus standard care in bariatric surgery [1, 2, 65, 66] No differences were found in major (OR 0.94, 95% CI 0.58 to 1.51) and minor postoperative complications (OR 0.88, 95% CI 0.55 to 1.41), and mortality (RR 0.4, 95% CI 0.1 to 2.2).”
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- Authors
- Qasim, A., Turcotte, M., de Souza, R. J., Samaan, M. C., Champredon, D., Dushoff, J., Speakman, J. R., & Meyre, D.
- Affiliations
- McMaster University (CA)
- Department of Health Research Methods, Evidence, and Impact McMaster University Hamilton ON Canada
- McMaster Children's Hospital (CA)
- York University (CA)
- University of Aberdeen (GB)
- Corresponding author
- Meyre, D.
- Venue
- Obesity Reviews
- Publisher
- Wiley
- Published
- 2017-11-16
- Volume
- 19
- Issue
- 2
- Pages
- 121-149
- ISSN
- 1467-7881 (ISSN-L)
- 1467-789X
- OpenAlex
- W2770109011
- Cited by
- 241
- References
- 31
- Citations by year
- 2026: 9 · 2025: 25 · 2024: 35 · 2023: 36 · 2022: 39 · 2021: 25 · 2020: 42 · 2019: 18 · 2018: 11 · 2016: 1
- FWCI
- 2.50
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Obesity Reviews (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Canada Research Chairs
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
- Keywords
- obesity, genetic predisposition to obesity, thrifty genotype hypothesis, genetic drift, epigenetic regulation, malnutrition, social determinants of health, mating systems, cultural evolution, population genetics, mathematical modeling
- MeSH terms
- Adaptation, Physiological, Energy Metabolism, Humans, Models, Theoretical, Obesity, Genetic Variation, Genetic Predisposition to Disease, Genetic Drift, Epigenesis, Genetic, Adiposity, Gene-Environment Interaction
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