It is not out of emotion or regret. When the onion is split, our eyes become irritated because we produce cellular breaks that allow an enzyme called allinase to come into contact with an odorless molecule present inside this product. This combination generates certain molecules, including propanotial, which, upon entering the eye, causes eye irritation and tearing due to its contact with water. Also the sulfuric acid that it produces contributes to damage the conjunctival membrane. For this reason, the home remedy of cutting the onion by previously bathing it in water gives good results, since this way the propanotial dissolves before it reaches the eyes.
Why do we cry with the onion?
Japanese scientists create a 'washing machine for humans'
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Women are better at doing crosswords
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