The Science Behind Why Onions Make You Cry
Understanding Onion Chemistry Onions, a prominent member of the Allium family, possess sulfur compounds absorbed from the soil. Cutting into an onion triggers the release of enzymes, leading to the formation of volatile compounds, including syn-propanethial-S-oxide. This potent gas irritates the eyes, activating the ciliary nerve and prompting tear production to alleviate the discomfort....