How do bees make royal jelly?

Bees produce royal jelly from glands in their hypopharynx, which are specialized glands located in their heads. Worker bees secrete this nutrient-rich substance to feed all larvae during their first few days of development. However, when a female larvae is selected to become a queen, she continues to receive royal jelly exclusively, promoting her growth and reproductive capabilities. This unique diet is what differentiates queen bees from worker bees.