Mixed
Obesity accelerates aging and increases mortality risk in younger individuals, but the relationship between adiposity and mortality becomes non-linear and potentially protective in elderly populations, where overweight status may be associated with lower mortality than healthy weight.
If you are older, do not panic about being slightly overweight (BMI 25-30). Research suggests this range may be associated with better survival outcomes than being underweight or even 'healthy' weight in the elderly. Focus on maintaining muscle mass and metabolic health rather than aggressive weight loss, which can be detrimental in older adults.
Young individuals living with obesity experience years of life lost from diabetes and cardiovascular disease to a greater extent compared with their older counterparts... Obesity (BMI > 30) is associated with greater mortality risk; however, overweight individuals (BMI = 25 to 30) have similar or, in some cases, lower mortality risk than individuals in the healthy (BMI = 18.5 to 24) or underweight (BMI < 18.5) range... The potential benefits of being above what is considered a 'healthy weight' appear to be even more pronounced in elderly populations.
Why this rating
Based on multiple observational studies and longitudinal data cited in the review, though causality is complex.
Source
Obesity and lifespan, a complex tango
Alberto Díaz‐Ruiz et al. · Science Translational Medicine · 2023
DOI 10.1126/scitranslmed.adh1175
More from this paper
- Visceral adipose tissue (VAT) is a stronger predictor of mortality risk than overall BMI or subcutaneous adipose tissue (SAT), while SAT may be associated with lower mortality risk.Good
- Caloric restriction and time-restricted feeding can extend healthspan and lifespan in animal models and improve metabolic health in humans, sometimes without weight loss, by reshaping molecular pathways in adipose tissue and aligning with circadian rhythms.Good
- GLP-1 receptor agonists (GLP-1 RAs) show promise as gerotherapeutic drugs by protecting against aging-related risk factors such as oxidative stress, cellular senescence, and inflammation, and may reverse brain aging and prevent sarcopenic obesity, although lifespan extension in humans is not yet reported.Moderate
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
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