Why Cutting Onions Hurt😭🧅

Añadido: 2026-05-17

[00:00:00]Ever wondered why onions make your eyes burn and tear up? It's actually the onion's secret chemical defense system fighting back. When you cut an onion, its cells break open. Enzymes mix with sulfur compounds and create a gas called syn-propanethial-S-oxide.

[00:00:15]That gas floats into your eyes and reacts with the natural water there, creating a mild acid. Your eyes respond by producing tears to wash it away. To reduce the tears, chill the onion first, use a sharp knife, or cut near running water.

[00:00:30]Science makes cooking easier.