Royal jelly and royal jelly belong to two kinds of bee products, there are differences in appearance, taste and composition, and the most important point is that there are some differences in nutritional value. Royal jelly is a special milky substance secreted by the royal jelly gland in the head of worker bees and used to feed the queen bee as well as the larvae. It is generally light yellow in color, resembling cream and solid when frozen, with sour, spicy, pungent and astringent flavors. The queen bee fetus is the fertilized egg laid by the queen bee, and the larval body grown and developed by worker bees fed only fresh royal jelly.