The Study
Association between saturated and polyunsaturated fatty acid proportions in total fat intake and mortality risk: mediation by the neutrophil percentage-to-albumin ratio
This study found that people who ate more saturated fat compared to their total fat intake tended to die sooner, and those who ate more polyunsaturated fat tended to live longer — but it doesn’t prove that changing what you eat will make you live longer. It just shows a pattern, like noticing that people who wear red shoes often trip — but we don’t know if the shoes caused the tripping.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Eating more saturated fat compared to other fats might make you more likely to die early, but eating more polyunsaturated fat instead might help you live longer — and this effect is stronger if you're young.
Where does this study sit?
Systematic Reviews & Meta-analyses
Max 100Randomized Trials
Max 90Cohort Studies
Max 72Case-Control
Max 58Cross-Sectional
Max 44Case Reports & Series
Max 30Expert Opinion
Max 547 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — a 23% higher risk means about 1 in 4 more people die early compared to those with lower saturated fat ratios, which is meaningful for public health.
- 2People with the most saturated fat relative to total fat had 23% higher death risk.
- 3People with the most polyunsaturated fat relative to total fat had 14% lower death risk.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Lipids in Health and Disease
Year
2025
Authors
Yanyan Liu, Jiaxuan Wang, Xiaona Chang, Xiaoying Ren, Guang Wang, Jia Liu
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.