Why do we cry when cutting onions? The secrets behind this phenomenon.

The act of cutting an onion can trigger a waterfall of tears in our eyes, but have you ever wondered why this happens?

The science behind tears. What causes this reaction? When we cut an onion, a volatile chemical compound called thiopropanal sulfoxide is released. This irritating compound reaches our eyes and activates a defense mechanism, triggering the production of tears to dilute and eliminate the irritant.

Thiopropanal sulfoxide reacts with the enzymes present in onion, giving rise to other chemical compounds, such as sulfenic acid. This acid is highly volatile and transforms into sulfinic acid upon contact with air, thus contributing to eye irritation. Our eyes are incredibly sensitive and are equipped with several layers of protection. When tears are triggered, they not only help eliminate the irritant, but also protect the ocular surface from possible damage.

So why do some people cry more than others? The amount of tears produced when cutting onions can vary considerably from person to person. Some people are more sensitive to irritating compounds, while others may have a greater tolerance. The way we cut the onion can also influence the intensity of crying. Slicing it thinly or chopping it quickly can increase the release of irritating compounds, causing a more pronounced reaction in our eyes.

Myths and realities about crying when cutting onions. Is it possible to avoid this phenomenon? Popular home methods Numerous home tricks have been proposed to avoid crying when cutting onions, such as lighting a nearby candle, chewing gum, or soaking the onion in water before cutting it. However, the effectiveness of these methods varies and they are not always completely successful.

In search of a definitive solution, some have turned to technology. Special knives and cutting boards have been developed, as well as devices that promise to neutralize the irritating compounds in onions. Although they may offer some relief, there is still no universally accepted solution.

Cutting onions can be an emotionally intense experience, but it is also a reminder of the complexity and diversity of nature. While tears may flow, we can also marvel at the intricate chemical and biological processes that are triggered by this simple culinary act.