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Why Do Onions Make You Cry?
°ü¸®ÀÚ 2024-10-07 ¿ÀÈÄ 4:37:40 41984

 

Why Do Onions Make You Cry?

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Description:

 

Onions make us cry because they contain sulfur compounds that release irritating vapors when cut.  These vapors trigger our eyes to water as a defense mechanism to wash away the irritant. 

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Transcription:

 

Ahoy! Let¡¯s think.

Today we answer the question: Why Do Onions Make You Cry?

Have you ever noticed that when people are cutting onions, their eyes begin to water or they start to cry?

You may have noticed that this doesn't usually happen when cutting any other type of fruit or vegetable.

So, what makes the onion unique that it can cause this? 

 

Onions are very good at absorbing sulfur, which they use in a number of amino acids.

Similar to animals which use camouflage, bright colors, or even poison to protect themselves, onions use amino acids as a form of protection. 

When you cut an onion, it releases enzymes called allinase, which mix with the sulfur-rich amino acids.

When combined, it forms a sulfenic acid, which is very volatile and moves through the air to cause irritation to the eyes. This, in turn, causes a reflex in our eyes to water in order to protect it from damage. 

 

So, do all onions cause us to cry? The biggest onion culprits are yellow, red, and white onions, which produce the harshest chemicals. Green onions have the least sulfur and are less pungent, so they typically have the least, if any, effect. 

 

If you love onions but don't like the tears, there are some suggestions to help you lessen the burn, such as using the freshest onions since the longer you store them, the more it affects their potency.

Other tips include using a very sharp knife to lessen the damage done to the onion, or cutting away or further from our eyes.

Some people will even wear protection around their eyes, such as goggles or even helmets, to prevent the vapors from reaching their eyes.

Have you seen or heard of any other methods to stop from tearing up while cutting onions? 

 

So, that answers the question: Why Do Onions Make You Cry? That took some thinking! 

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Questions:

 

1. What are the specific amino acids that onions use for protection?

2. Are there any other vegetables or fruits that produce chemicals that irritate the eyes, like onions?

3. Besides the tips mentioned in the video, what are some other techniques people use to avoid crying when cutting onions?​


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