What is the difference in nutritional value between purple onion and yellow onion?

Onion is a common food in our daily life. It tastes spicy and is rich in nutrition. It can be divided into purple onion and yellow onion according to its appearance color. There are also some differences in their nutritional value. Relatively speaking, the nutritional value of purple onion is higher. So what is the difference between the nutritional value of purple onion and yellow onion? Today, the editor will take you to understand it together.

What is the difference in nutritional value between purple and yellow onions?

1. Purple onion has a high content of allicin

Purple onion tastes much stronger than yellow onion, which means purple onion has a high content of allicin, a natural anti-inflammatory and bactericidal ingredient that can kill many germs in the human body and has a certain therapeutic and preventive effect on many common diseases such as colds, enteritis, and tracheitis. Yellow onion has a lower content of this substance and its anti-inflammatory and bactericidal effect is worse than purple onion.

2. Purple onion contains quercetin

Purple onion contains a large amount of natural quercetin, which is mainly concentrated in the purple skin of purple onion, while yellow onion does not contain this ingredient. Quercetin is a natural anti-cancer ingredient that can effectively prevent cell canceration and inhibit the regeneration of cancer cells. People usually eat purple onion to prevent and fight cancer, but eating yellow onion does not have this effect.

3. Purple onion has a high content of trace element selenium

The content of trace element selenium in purple onion is particularly high, which is a natural antioxidant that can delay cell aging. In addition, purple onion also contains some anthocyanins, which can also increase cell activity and inhibit body aging. The content of trace element selenium and anthocyanins in yellow onion is particularly low, and its anti-aging effect is much worse than that of purple onion. This is also the biggest difference in their nutritional value.