Macro partitioning
High intake of olive oil is significantly associated with reduced risk of all-cause mortality, cardiovascular events, and stroke, whereas general monounsaturated fatty acid (MUFA) intake from mixed sources shows no significant protective effect.
Prioritize olive oil as your primary source of monounsaturated fats for heart health and longevity. Simply increasing total MUFA intake without specifying olive oil may not provide the same protective benefits against mortality and stroke, as mixed sources (including animal fats) showed no significant benefit in this analysis.
Following subgroup analyses, significant associations could only be found between higher intakes of olive oil and reduced risk of all-cause mortality, cardiovascular events, and stroke, respectively. The MUFA subgroup analyses did not reveal any significant risk reduction.
Why this rating
Meta-analysis of 32 cohort studies with over 800,000 subjects provides strong observational evidence, though heterogeneity and potential publication bias are noted.
Source
Monounsaturated fatty acids, olive oil and health status: a systematic review and meta-analysis of cohort studies
Lukas Schwingshackl et al. · Lipids in Health and Disease · 2014
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 →