Body weight
Body weight has been studied in 17 papers since 2016: 7 observational studies in people, 7 in animals, 3 reviews; 1 in the past year. The newest paper, Jun 23, 2026: “Lifestyle Factors Associated with Osteoporosis Risk”.
“we found positive associations (all p ≤ 0.020) of body weight (adj. R2 = 0.398; β = 0.11)”
None of its findings points the other way.
- 6 independent labs in 5 countries
- Funders: National Institute on Aging and others
- 2 of 7 findings with company ties
- Humans7
- Animals7
What did studies of Body weight find?
1Studies of Body weight measured 1 outcome; the most studied are post-operative cognitive dysfunction (1 study).
Post-operative cognitive dysfunction
no changein humans1RR 0.99
1 study
Post-operative cognitive dysfunction
no changein humans1RR 0.99
Body weight showed no clear effect on post-operative cognitive dysfunction in humans (body weight analysed continuously) (RR 0.99 per kg (95% CI 0.89–1.09)).
“relative risk 0.99 per kg; 95% confidence interval 0.89, 1.09; p = 0.83”
Reviewbody weight analysed continuouslyper kg
Obesity and post-operative cognitive dysfunction: a systematic review and meta-analysis
Diabetes/metabolism research and reviews
What is Body weight linked with?
7Studies link Body weight with 7 measures, most often platelet count (1 study), GDF-15 (1) and plasma neurofilament light chain (1).
Platelet count
downin dogs1
1 study
Platelet count
downin dogs1
Body weight is associated with platelet count in dogs.
“Platelet count had a negative association with body weight.”
Animalsn = 47
The companion dog as a model for inflammaging: a cross-sectional pilot study
GeroScience
GDF-15
upin humans1
1 study
GDF-15
upin humans1
Body weight is associated with GDF-15 in the overweight/obese group (adj. R2 = 0.398; β = 0.11).
“we found positive associations (all p ≤ 0.020) of body weight (adj. R2 = 0.398; β = 0.11)”
Humansin the overweight/obese groupn = 514
Growth differentiating factor-15 and adiposity in young adults: The African-PREDICT study
International journal of obesity (2005)
Plasma neurofilament light chain
downin dogs1
1 study
Plasma neurofilament light chain
downin dogs1
Body weight is associated with plasma neurofilament light chain in dogs (lower body weight associated with higher pNfL) (P < 0.001).
“decreased body weight (P < 0.001)”
Animalslower body weight associated with higher pNfLn = 55
Neuroscience letters
Epigenetic age
upin mice1
1 study
Epigenetic age
upin mice1
Body weight is associated with epigenetic age in mice.
“Both higher BW and the HFD were associated with accelerated epigenetic aging.”
Animalsliverfemalesn = 70
Aging cell
Sphingomyelin
upin dogs1
1 study
Sphingomyelin
upin dogs1
Body weight is associated with sphingomyelin in dogs (independent of age).
“sphingomyelins were significantly higher in large, short-lived dogs, independent of age”
Animalsindependent of age
Alterations of Lipid Metabolism With Age and Weight in Companion Dogs
The journals of gerontology. Series A, Biological sciences and medical sciences
Tryptophan pathway metabolites
downin dogs1
1 study
Tryptophan pathway metabolites
downin dogs1
Body weight is associated with tryptophan pathway metabolites in dogs after controlling for location.
“tryptophan metabolism emerged as significantly associated with weight of the dogs, with small dogs having significantly higher levels of tryptophan pathway metabolites”
Animalsafter controlling for location
Tryptophan metabolism is differently regulated between large and small dogs
GeroScience
Mortality
upin dogs1HR 1.19
1 study
Mortality
upin dogs1HR 1.19
Body weight raises the risk of mortality in dogs (body weight measured at 10 years of age) (HR = 1.19 per additional kg, P = 0.004).
“for each additional kg of BW at 10 years, dogs had a 19% higher hazard (HR = 1.19, P = 0.004)”
Animalsbody weight measured at 10 years of agen = 39
Acta veterinaria Scandinavica
Funding
10 grants since 2019National Institute of Diabetes and Digestive and Kidney Diseases$3.9MNational Cancer Institute$4.4MJapan Society for the Promotion of Science¥6.5M
National Cancer InstituteUniversity of Illinois Chicago$958K2021–2027
National Institute of Diabetes and Digestive and Kidney DiseasesUniversity of Illinois Chicago$500K2021–2027
Linking insufficient sleep with body weight in Black emerging adults.
National Heart, Lung, and Blood InstituteUniversity of North Carolina Greensboro$59.6K2024–2025
The Impact of Early Life Stress on Reward and Body Weight
National Institute of Diabetes and Digestive and Kidney DiseasesUniversity of Kansas Medical Center$71.8K2021–2024
Fonds Wetenschappelijk OnderzoekFonds voor Wetenschappelijk Onderzoek-Vlaanderen2023–2026
National Institute on AgingKennesaw State University$380K2021–2025
Japan Society for the Promotion of ScienceKogakuin University¥3M2021–2025
National Institute for Occupational Safety and HealthState University New York Stony Brook$500K2020–2021
Effects of conditioning on time-restricted feeding and body weight control
Japan Society for the Promotion of ScienceDoshisha University¥3.5M2019–2022
Computational modeling of human metabolism, body weight and composition
National Institute of Diabetes and Digestive and Kidney DiseasesNational Institute of Diabetes and Digestive and Kidney Diseases$328K