Scientific evidence shows that the tears you shed from cutting onions are chemically different from tears over heartbreak emotional tears have a higher protein content

Scientific evidence shows that the tears you shed from cutting onions are chemically different from tears over heartbreak. Emotional tears have a higher protein content.

We’ve all experienced it before – that familiar sting in the eyes, the uncontrollable flow of tears, and the burning sensation that accompanies slicing into an onion. But have you ever wondered why this happens? Why do onions make us cry?

Scientific research has shed light on this phenomenon, revealing that the tears shed from cutting onions are chemically different from tears shed due to emotional distress. These two types of tears have distinct compositions, one of which includes a higher protein content in emotional tears.

When we chop an onion, we release a compound called syn-propanethial-S-oxide (SO), which is responsible for the pungent odor and irritant effects. When this compound comes into contact with the eyes, it triggers a series of chemical reactions. The onion’s cells rupture, releasing enzymes, and sulfur-containing molecules, which then react to form sulfuric acid. This acid stimulates nerve endings in the eyes, leading to the sensation of irritation.

In response to this irritation, the lacrimal glands located in the upper outer corner of our eyes produce tears. These tears act as a protective mechanism, washing away the irritants and helping to alleviate the discomfort. However, these tears differ in composition depending on the cause of their release.

Interestingly, emotional tears contain a higher protein content compared to tears shed from cutting onions. This variation in protein content is attributed to the physiological response of our body to emotional distress. When we experience intense emotions such as sadness, heartbreak, or joy, our body releases hormones and neuropeptides that contribute to the makeup of emotional tears. These tear proteins may serve various functions, including stress reduction and signaling emotional states.

While the composition of tears may differ, both tears shed during onion cutting and emotional tears share a common purpose – to cleanse and protect our eyes. Tears help maintain the moisture and lubrication of our eyes, ensuring their proper functioning and preventing dryness and irritation.

In conclusion, the tears we shed from cutting onions are chemically different from tears shed due to emotional distress. The pungent compound released from the onion triggers a series of reactions that lead to irritation and the production of tears. These tears have a distinct composition compared to emotional tears, including a higher protein content. Understanding the science behind the onion-induced tear response enhances our knowledge of our body’s remarkable ability to adapt and protect itself.

Source: Time