Understanding the Positive Effects of Extra Virgin Olive Oil on Cardiovascular Diseases
By Paolo DeAndreis
Updated: September 24, 2024, 00:23 UTC
Cardiovascular Diseases: The Leading Global Cause of Death
Cardiovascular diseases (CVD) remain the most common cause of death worldwide. These conditions encompass a range of disorders affecting the heart and blood vessels, including coronary heart disease, rheumatic heart disease, and cerebrovascular disease.
According to the New York State Department of Health, approximately 695,000 Americans die from heart disease each year, accounting for one in five deaths in the United States. Similarly, the World Health Organization (WHO) reports that cardiovascular diseases contribute to 32% of all global deaths.
While genetic factors, environmental pollution, and lifestyle choices all play a role in the development of heart disease, increasing research suggests that consuming extra virgin olive oil (EVOO) daily can significantly reduce cardiovascular risk.
The Scientific Evidence Behind Olive Oil’s Cardioprotective Effects
A large-scale study conducted in Spain in the 2010s found that adherence to the Mediterranean diet, which includes daily olive oil consumption, significantly reduced cardiovascular events compared to a low-fat diet in at-risk individuals.
This study, known as PREDIMED (PREvención con DIeta MEDiterránea), was published in the New England Journal of Medicine and served as a foundation for further research worldwide.
Additionally, the Seven Countries Study, which has been ongoing since the 1950s in the U.S., Finland, the Netherlands, Italy, Greece, Yugoslavia, and Japan, confirmed the crucial role of olive oil and the Mediterranean diet in reducing cardiovascular disease risk.
This extensive epidemiological study included 12,000 middle-aged men and found that consuming monounsaturated fats (particularly from olive oil) and following a Mediterranean diet significantly lowered heart disease risks.
These studies proved the significant influence of dietary habits on cholesterol levels and the development of cardiovascular conditions.
As a result, in recent years, hundreds of scientific publications have focused on understanding the unique role of olive oil in human health.
The Role of Monounsaturated Fatty Acids (MUFA)
One of the primary reasons for the health benefits of EVOO is its high content of monounsaturated fatty acids (MUFA), particularly oleic acid.
According to Bruno Tuttolomondo, a professor of internal medicine at the University of Palermo and head of the stroke care unit at Policlinico Hospital, extra virgin olive oil contains between 60% and 83% MUFA.
The remaining percentage consists of small amounts of saturated fatty acids (such as palmitic and stearic acid) and polyunsaturated fatty acids.
Tuttolomondo emphasizes that MUFAs play a critical role in preventing cardiovascular diseases:
"MUFA helps protect heart health by lowering cholesterol and LDL levels, reducing LDL oxidation, and preventing the formation of atherosclerotic plaques."
LDL (low-density lipoprotein), often referred to as "bad cholesterol," can accumulate in the blood vessels, leading to plaque buildup and atherosclerosis, increasing the risk of heart attacks and strokes.
Since MUFA is the most abundant component of extra virgin olive oil, it is classified as a "good fat."
The Role of Polyphenols in Reducing Cardiovascular Disease Risk
Polyphenols are a large group of bioactive compounds found in many foods. However, EVOO contains a unique set of rare polyphenols that offer powerful antioxidant and anti-inflammatory effects when consumed.
Tuttolomondo highlights that oleuropein, a key polyphenol in EVOO, has been one of the most studied compounds regarding its impact on cholesterol levels and cardiovascular health.
Research conducted by Francesco Violi’s team at Sapienza University in Rome has shown that oleuropein helps stabilize lipid plaques and reduces LDL oxidation, further protecting heart health.
Can Extra Virgin Olive Oil Help Prevent Diabetes?
According to the World Health Organization (WHO), 422 million people worldwide have diabetes. Research suggests that adherence to the Mediterranean diet, which includes EVOO, can significantly reduce the risk of developing diabetes.
Since diabetes damages blood vessels, it is directly linked to cardiovascular diseases.
Tuttolomondo explains that EVOO helps prevent diabetes by improving insulin sensitivity and regulating blood sugar levels.
How Much Extra Virgin Olive Oil Should You Consume Daily?
EVOO should be consumed daily for optimal health benefits. However, not all extra virgin olive oils are the same.
The polyphenol content varies depending on olive variety, cultivation conditions, and processing methods.
“A high-quality extra virgin olive oil should contain at least 250-350 mg/kg of polyphenols.”
Studies suggest that consuming 20 grams of EVOO per day (about 1-1.5 tablespoons) provides the optimal cardiovascular benefits associated with the Mediterranean diet.
Some research indicates that up to four tablespoons per day may offer even greater heart health benefits.