Journal

Almost everything on the front of an olive oil bottle is designed to sell you something. Here's how to read the parts that actually matter—and a 30-second check you can run in the aisle.

Most olive oil in grocery stores has quietly lost the compounds responsible for nearly all its health benefits. Here's what polyphenols are, why so many bottles have lost them, and a 10-second test to spot a real high-polyphenol oil at home.