1. It may improve heart health
Olive oil is a key component of the Mediterranean diet and there has been a great deal of research showing its benefits for heart health. This includes the ability to lower blood pressure and improve cholesterol levels, both of which contribute to a reduced risk of heart disease.
A broad review of these studies showed that olive oil is a source of monounsaturated fat that reduces the risk of both stroke and heart disease.
2. It may reduce inflammation
Inflammation is thought to be one of the main drivers behind some of our most chronic health problems, including Alzheimer's and type-2 diabetes. Research studies looking at the role of antioxidants and their anti-inflammatory effects, including the oleic acid found in olive oil, have discovered that they play a role in reducing inflammation and a marker of inflammation known as C-Reactive Protein (CRP).
3. It may improve mood
As part of a healthy diet with high amounts of fruits, vegetables, whole grains and oily fish, olive oil has been found to play a role in reducing the risk of depression.
4. It may improve brain function.
A 2015 study found that a Mediterranean diet supplemented with olive oil or nuts in older populations was associated with improved cognitive function and may reduce the risk of Alzheimer's.
5. It protects against chronic diseases
Other early research suggested that olive oil and its high polyphenol content may have a protective effect against type 2 diabetes and some types of cancer. However, more research is needed before firm conclusions can be drawn.
Is olive oil healthy for everyone?
As a staple food for many of the world's healthiest populations, olive oil is seen as a good choice for the majority of people. However, rare reports of allergies have been recorded, but these are typically to the pollen of the olive tree rather than the oil of the fruit.
The use of olive oil with high calorie density should be moderated by substituting it for other fats used in the diet.