Why do Onions Make Your Eyes Water?

Answer

There are enzymes contained in the cells of onions that release acid sulphoxides into the air when broken, your eyes are very sensitive and therefore when this acid comes into contact with them your eyes automatically water as a defence mechanism.
1 Additional Answer
Many people wonder why onions make your eyes burn, the reason for this is because onions give off there own natural gases. The natural gases creates sulfuric acid and makes your eyes burn. If you want ti minimize the burning in your eyes try rinsing the onion in cold water.
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