A scientific study has focused on a universal domestic drama: crying while cutting onions. Far from being a personal flaw, the research reveals that the intensity of tearing depends on each person's individual chemical sensitivity. If you end up looking like a fountain while your companion doesn't even blink, science backs you up: it's normal and there's nothing to be sorry about (besides the onion itself).
The chemistry of tearing: sensitivity and enzymes 🧅
The mechanism is well-known: when cutting an onion, the gas syn-propanethial-S-oxide is released, an irritating compound that reacts with the eye's moisture to form diluted sulfuric acid. What is novel about the study is that it analyzes the variability in the production of the lachrymatory-factor synthase enzyme and the ability of each cornea to regenerate the protective tear layer. People with a higher density of trigeminal receptors or a lower corneal irritation threshold exhibit more intense responses. It's not a user error, but a factory setting.
Spoiler: no, you are not the onion's chosen one 😢
Don't worry, you haven't discovered a superpower nor is it a gypsy curse. You simply have more sensitive eyes than average, like someone with thin skin or who gets emotional over detergent commercials. The onion doesn't hate you personally; it's a democratic vegetable that attacks everyone, it just hits some people's bullseye more accurately. Next time you cry, remember: it's not weakness, it's chemistry applied to your face.