In hot summer, eating an iced watermelon can really refresh people. However, a research report submitted by scientists from the US Department of Agriculture on the 26th showed that the nutritional components of chilled watermelons were far lower than those preserved at room temperature.

According to the research report published in the American Journal of Agricultural and Food Chemistry, watermelon can still produce nutrients after being picked, but rapid cooling will delay the process of producing nutrients, thus reducing nutrients.

The researchers said: "Under normal circumstances, watermelons can be stored at 13℃ for 14 ~ 2 1 day; But in cold conditions, such as only 5 C, watermelons start to rot in a week. "