Frying olive oil too long breaks down its natural compounds and creates new ones—but adding olive extract slows this breakdown and even boosts total antioxidants for the first few hours.

When you add olive extract to frying oil, it helps keep more of the natural plant compounds that give olive oil its health benefits—even after long frying.

Adding a natural olive extract to olive oil helps it resist going rancid when used for deep frying at high heat for a long time—much longer than plain olive oil.

Even with added extract, frying olive oil too long makes it lose its good taste—but the extract still makes it taste less rancid than plain oil.

When you add a special olive extract to olive oil, the healthy antioxidants in it don’t break down as fast—even when you fry it for hours at high heat.

After frying for 12 hours, regular olive oil loses almost all its healthy compounds, but extra virgin olive oil still keeps about a third of them — adding sesame oil doesn’t help preserve them.