Olive oil intake is inversely related to cancer prevalence: a systematic review and a meta-analysis of 13,800 patients and 23,340 controls in 19 observational studies.

The combined effect of the highest percentile of olive oil intake compared with the lowest was highly significant (p < 0.001).

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Results showed that although increasing conformity to the Mediterranean diet was not associated with lower breast cancer risk in the entire cohort, however there was a marginally significant inverse association among postmenopausal women (HR = 0.78 for every 2 points; 95%CI 0.62 to 0.98).

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