All Simple Vegetable Recipes

Why Do Onions Make you Cry?

  • There is no mystery to this. Onions contain a water-soluble organic sulphur compound called alliin, referred to in onions as the lacrimatory precursor - the harbinger of tears. This is present in varying amounts in different onions, hence some varieties will reduce you to tears more readily than others.

  • When the onion bulb is cut the enzyme alliinase acts on the alliin to produce an organic sulphur compound which reacts with water (the moisture in your eyes as you are standing over the onion with your knife) to produce sulphuric acid. It is the acid which produces tears and makes your eyes sting.

  • Tips: Slicing an onion right through, keeping its root intact, helps to prevent tears when chopping or slicing.

More about Onion Vegetables Recipes

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