Brief
The only way to know if olive oil is pure is to test it chemically. But knowing how quality olive oil tastes is the next best way. Extra virgin olive oil should smell and taste like fresh olives. Refined olive oils have very little smell and taste, so getting a sense of purity with these lower grades isn’t something you can do at home.
For more quick answers to your olive oil questions, ask Ollie — a bot developed by the Olive Oil Times Education Lab that uses artificial intelligence to help people learn more about olive oil.
Want to be an olive oil expert? The Olive Oil Times Education Lab offers courses in New York, London and online.