Royal jelly, also known as royal jelly and bee milk, is the secretion of the pharyngeal head glands of young worker bees that cultivate larvae in the hive of honey bees, and it is the food supplied to the larvae that will be turned into the queen bee, and it is also the food of the queen bee for her lifetime. The so-called royal jelly is a kind of milky substance secreted by young and strong bees after eating pollen, this milky substance is just like mammalian milk and is very nutritious and immune and contains high longevity factor, bees and queen bees are the same in the egg stage, after hatching, they eat royal jelly for three days and then change to honey and pollen after hatching to become bees, and after hatching, they always consume royal jelly to grow into a queen bee.