Category Archives: Mildly Stimulating Oil

Why Do Onions Make my Eyes Water?

Onions contain a mildly stimulating oil.  This oil readily forms a vapor (gas) which escapes when the onion is cut.  It not only gives the onion its sharp odor, but also irritates the eye.  The eye reacts by producing a flow of tears to wash away the pungent stuff the onion gives off. When you …

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