Why Chopping Onions Makes You Cry
Ever wonder why your eyes fill with tears when you chop an onion? One eye doctor pinpoints the culprit. Onions use sulfur in the soil to create amino acid sulfoxides, which are sulfur compounds that readily turn into a gas. When an onion is cut open, it releases the sulfoxides and enzymes, which react and create a gas called syn-propanethial-S-oxide. Because onions grow underground, this gas helps deter critters that want to feed on them. But the gas is also what causes your