You must have wondered why the eyes fill with tears whenever you chop onions. There is no visual health risk with this, but it IS irritating, isn’t it?
– Onions make use of sulfur in the soil to produce amino acid sulfoxides that will turn into a gas called syn-propanethial-S-oxide.
– The gas is created through a complex chemical process with red, yellow and white onions having higher concentrations of the lachrymatory enzyme.
– Tearing is a way of protecting the eyes from potentially harmful substances and is triggered by the nerves.
Chopping onions can cause some burning and irritation and tears. Other than that, it’s pretty safe on your eyes. It’s a temporary sensation with no known long-term effects, nor will it worsen any other conditions, like pink eye.
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