According to the folks at Prego themselves—assuming they have time between perfecting marinara and fighting off rival pasta hordes—your opened jar of Prego is good for about five to seven days in the fridge. Yes, you heard that right: a single week of glory, give or take a day for good behavior. That’s it. No more “it’s been two weeks, but it smells fine” mental gymnastics.
Why so short? Because once you crack that seal, you’ve invited oxygen, bacteria, and your own questionable kitchen habits into the party. Think of it like a vampire: once exposed to the air, it has a limited lifespan before it turns into something you don’t want to invite back.
