Is it time to toss it? Whether I'm roasting vegetables, pan-frying a piece of fish, or whisking together a salad dressing, nearly everything I cook uses olive oil. That means for me—and countless ...

Yes, olive oil can go bad, and it turns rancid over time due to exposure to heat, light, and oxygen. Even though olive oil doesn’t spoil like dairy, it oxidizes and becomes rancid. This negatively ...