Does Chewing Gum Stop Onion Tears? The Truth Revealed

You've probably heard the tip: pop some gum in your mouth before slicing onions and you'll be tear-free. It's kitchen folklore that's been passed around for years, showing up in life hack lists and cooking forums. But does this minty trick actually work, or is it just another culinary myth?

The short answer: it might help a tiny bit, but don't expect miracles. The science doesn't really back this one up as a reliable solution.

Why Onions Make You Cry

When you cut into an onion, you break cell walls and release enzymes. These enzymes react with sulfur compounds in the onion to create syn-propanethial-S-oxide, a volatile gas that floats up to your eyes. When this gas hits the moisture in your eyes, it forms sulfuric acid—and your eyes respond by producing tears to flush out the irritant.

It's your body's defense mechanism, and it's remarkably effective at making grown adults weep over dinner prep.

The Gum Theory

Proponents claim chewing gum works through two possible mechanisms:

• Mouth breathing: Chewing encourages you to breathe through your mouth instead of your nose, potentially directing onion vapors away from your tear ducts
• Distraction: The act of chewing might stimulate saliva production or simply keep your mind off the irritation

Sounds plausible, right? The problem is that onion gases don't care much about your breathing pattern. They rise naturally and find your eyes regardless of whether you're breathing through your mouth or nose.

What Actually Works

If you're serious about stopping onion tears, here are methods with actual science behind them:

• Chill your onions: Cold temperatures slow down the enzyme reactions. Refrigerate onions for 30 minutes before cutting
• Use a sharp knife: A sharp blade crushes fewer cells, releasing less of the tear-inducing compound
• Cut near ventilation: A fan, open window, or range hood pulls vapors away from your face
• Rinse frequently: Running the onion and knife under cold water washes away irritants
• Wear protection: Swim goggles look ridiculous but create a physical barrier (and they absolutely work)

Some chefs swear by leaving the root end intact until last, since that's where sulfur compounds concentrate most heavily.

The Verdict

Chewing gum isn't completely useless—if it encourages mouth breathing or distracts you enough that you don't notice minor irritation, you might experience marginal relief. But calling it an effective solution is generous at best.

The truth is that gum addresses the symptoms (barely) rather than the cause. You're still releasing the same amount of irritating gas, and that gas is still reaching your eyes. At best, you might reduce tears by 10-20%, and even that's optimistic.

If you want to actually prevent onion tears rather than just slightly reduce them, stick with temperature control, proper knife technique, and good ventilation. Your eyes—and your dignity—will thank you.