不是。用射线照过，有助于长期保存

https://baike.baidu.com/item/辐射保鲜

https://www.fda.gov/food/buy-store-serve-safe-food/food-irradiation-what-you-need-know

“The FDA has evaluated the safety of irradiated food for more than 30 years and has found the process to be safe. The World Health Organization (WHO), the Centers for Disease Control and Prevention (CDC) and the U.S. Department of Agriculture (USDA) have also endorsed the safety of irradiated food.”