ArticleLipids in health and disease2025
Association between saturated and polyunsaturated fatty acid proportions in total fat intake and mortality risk: mediation by the neutrophil percentage-to-albumin ratio.
Article in Lipids in health and disease, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Prospective pan-cancer analysis of postdiagnosis milk and yogurt intake types with mortality and life expectancy.European journal of nutrition · 2026Article
- Ketogenic metabolic therapy: low-carbohydrate interventions as novel neuroprotective strategies for cognitive dysfunction in diabetes.Frontiers in aging neuroscience · 2026Review
- Association of dietary quality, biological aging, progression and mortality of cardiovascular-kidney-metabolic syndrome: insights from mediation and machine learning approaches.Nutrition journal · 2025Article
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6 authors.
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Abstract
backgroundFor over half a century, dietary guidelines have consistently advocated for the substitution of saturated fatty acids (SFA) with monounsaturated (MUFA) and polyunsaturated fatty acids (PUFA) as a cornerstone strategy for health life, but evidence on independent associations between specific fatty acids and mortality remains inconsistent.
methodsThis prospective cohort study from the National Health and Nutrition Examination Survey (NHANES) 2007-2018 analyzed 21,823 participants aged 20-80 years. Survey-weighted Cox regression assessed associations between SFA, MUFA, PUFA intake, and their ratios to the total fat (TFAT) intake quantity, and all-cause mortality. Mediation analyses examined whether the neutrophil percentage-to-albumin ratio (NPAR) mediated the effects of fatty acid-related parameters on mortality risk.
resultsIn multivariable-adjusted models, no significant trends were observed for all-cause mortality across tertiles of SFA, MUFA, or PUFA intake. In multivariable-adjusted Cox models, the highest tertile of SFA/TFAT ratio was significantly associated with elevated mortality risk (HR = 1.23, p for trend < 0.01). Conversely, the highest PUFA/TFAT tertile demonstrated a protective association (HR = 0.86, p for trend < 0.01). However, the MUFA/TFAT ratio showed no significant mortality association across tertiles (p for trend = 0.137). Mediation analysis revealed that NPAR mediated 9.8% and 11.8% of SFA/TFAT and PUFA/TFAT effects on mortality risk, suggesting partial mediation through a shared inflammatory pathway.
conclusionThis study provides the novel evidence that the proportional composition of dietary fatty acids within total fat intake-rather than their absolute intake levels-is a critical determinant of longevity. By demonstrating that replacing SFA with PUFA reduces mortality risk through NPAR-mediated inflammatory pathways, our findings inform the World Health Organization's 2023 guidelines on dietary fat modification. These results shift the paradigm from isolated nutrient restrictions to balanced fatty acid ratios, offering a novel mechanistic basis for public health strategies aimed at extending healthy lifespan.
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