Why Do We Cry When We Cut Onions?

If you’re one of those who suffers every time you cut an onion, you know that eye irritation is almost inevitable. But why does it happen?

The answer lies in chemistry! When you cut an onion, you damage its cells, and they release a chemical substance called propanethial S-oxide. This compound combines with the moisture in your eyes, forming an acid that irritates your tear glands and makes you cry.

Fortunately, there are some tricks to reduce this discomfort! One of the most well-known methods is to place the onion in the fridge before cutting it, as it slows down the release of these chemicals. Another trick is to cut the onion under running water or use a fan to blow the gases away from your eyes.

Incredible how a simple kitchen ingredient can trigger such an interesting reaction, right?