Research
Adherence
Intentional weight loss is not consistently associated with reduced mortality risk and may increase mortality risk in healthy individuals.
If you are healthy and do not have obesity, intentional weight loss may not reduce your mortality risk and could potentially increase it. Instead, focus on maintaining a healthy lifestyle with regular physical activity and balanced nutrition.
GoodRefutesMEDIUM confidence
intentional weight loss was associated with an 11% higher mortality risk among healthy individuals (8 studies) and a 9% higher risk among mostly healthy adults without obesity (5 studies).
Why this rating
Based on meta-analyses of observational studies and RCTs, though some RCTs had limited mortality data.
Source
Obesity treatment: Weight loss versus increasing fitness and physical activity for reducing health risks
Glenn A. Gaesser et al. · iScience · 2021
DOI 10.1016/j.isci.2021.102995
narrative_reviewCited 149×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Increasing cardiorespiratory fitness (CRF) or physical activity (PA) consistently reduces all-cause and cardiovascular mortality risk, whereas intentional weight loss does not consistently reduce mortality risk and may increase it in healthy individuals.Strong
- High cardiorespiratory fitness (CRF) attenuates or eliminates the mortality risk associated with high BMI, such that 'fit' obese individuals have lower mortality risk than 'unfit' normal-weight individuals.Strong
Related findings · Adherence
- Regular physical activity (at least 150 minutes/week of moderate-intensity) reduces all-cause and cardiovascular mortality by 20-30% and lowers the risk of type 2 diabetes by 25-35%.Strong
- Increasing physical activity from a sedentary lifestyle to an active one in middle adulthood significantly reduces the risk of coronary events compared to remaining sedentary.Strong
- Resistance exercise is the only intervention capable of consistently restoring muscle function and strength in sarcopenia, partially overcoming age-related anabolic resistance.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →