Olive oil may be the most essential part of the Mediterranean diet but today it is used more widely because of its extensive health benefits. One such amazing benefit is that it helps reduce the risk of heart disease. Mainly attributing its benefits to its richness in unsaturated fats or good fats here's how olive oil works to keep your heart healthy. It reduces cholesterol: Cholesterol is the major contributor of heart disease and olive oil lowers bad cholesterol and triglycerides in your blood without altering the good cholesterol levels. Some studies suggest that it may even boost good cholesterol.