A March 2020 study by the Harvard T.H. Chan School of Public Health said,
"Previous studies have linked high consumption of olive oil with better cardiovascular health, particularly in Mediterranean countries where olive oil intake is much higher than in the United States."
"Our aim was to investigate whether higher olive oil consumption was beneficial to heart health in the U.S. population."
"One interesting thing our study shows is that although olive oil was better than most animal fats and margarine, it was not superior to vegetable oils in this study population."
"This means that replacing any type of animal fat with vegetable oils, including olive oil but also others, could be a good strategy to improve cardiovascular health."