Why do my eyes burn and tear up completely uncontrollably when I am chopping onions?

Why do my eyes burn and tear up completely uncontrollably when I am chopping onions?

1. Introduction Your eyes burn and tear up completely uncontrollably when you are chopping onions due to a fascinating botanical defense mechanism that releases a volatile chemical compound called syn-propanethial-S-oxide into the air. When you slice through the cellular walls of the onion, stored enzymes mix with amino acid sulfoxides to produce this specific lachrymatory … Read more