Effects of olive oil on blood pressure: A systematic review and meta-analysis

F. Zamora-Zamora; J. M. Martínez-Galiano; J. J. Gaforio; M. Delgado-Rodríguez

doi:10.3989/gya.0105181

Authors

F. Zamora-Zamora Paediatric Emergency Department, Hospital Complex of Jaén https://orcid.org/0000-0002-2623-8645
J. M. Martínez-Galiano Department of Health Sciences, Faculty of Experimental Sciences, University of Jaén - CIBER-ESP, Instituto de Salud Carlos III https://orcid.org/0000-0002-0878-8635
J. J. Gaforio CIBER-ESP, Instituto de Salud Carlos III - Center for Advanced Studies in Olive Grove and Olive Oils. University of Jaén - Immunology Division, Department of Health Sciences, Faculty of Experimental Sciences, University of Jaén - Agrifood Campus of International Excellence https://orcid.org/0000-0003-2996-9301
M. Delgado-Rodríguez Department of Health Sciences, Faculty of Experimental Sciences, University of Jaén - CIBER-ESP, Instituto de Salud Carlos III https://orcid.org/0000-0002-3838-2548

DOI:

https://doi.org/10.3989/gya.0105181

Keywords:

Diastolic Pressure, Hypertension, Olive oil, Randomized Controlled Trial, Systematic review, Systolic pressure

Abstract

Hypertension is one of the most important risk factors associated with the development of cardiovascular diseases. Numerous studies have revealed that a diet enriched in olive oil can have a beneficial effect on blood pressure. This systematic review includes the effects of olive oil on blood pressure in individuals without previous cardiovascular events. Liquid oil shows a decrease in blood pressure, while capsules have not produced any effect. Diastolic blood pressure decreased after the consumption of olive oil, -0.73 mm Hg, 95% CI (-1.07, -0.40); p < 0.001, I² = 86.9%, with high heterogeneity among the included studies. This reduction was mainly due to extra virgin olive oil (EVOO) from 10 ml to 50 ml/day: -1.44 mm Hg, 95% CI (-1.89, -1.00); p < 0.001. Regarding systolic blood pressure the observed decrease is not statistically significant. Further studies on the consumption of EVOO are needed to confirm these results.

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