Why Do We Cry When We Chop Onions?

 It’s not just your emotions — onions fight back.

1. Enzyme Reaction  

Cutting onions releases enzymes that mix with sulfur, creating a gas called syn-Propanethial-S-oxide.

2. It Hits Your Eyes  

This gas wafts up and irritates your tear glands, causing stinging and watery eyes.

3. How to Prevent It  

- Chill the onion first  

- Use a sharp knife  

- Cut under a vent or fan

Onions aren’t mean — they’re just chemically dramatic.