Royal jelly is a honey bee secretion that is used in the nutrition of larvae, as well as adult queens. It is secreted from the glands in the hypopharynx of worker bees, and fed to all larvae in the colony, regardless of sex or caste.
When worker bees decide to make a new queen, because the old one is either weakening or dead, they choose several small larvae and feed them with copious amounts of royal jelly in specially constructed queen cells. This type of feeding triggers the development of queen morphology, including the fully developed ovaries needed to lay eggs.

Effects on  human body

It has proven to be the richest and  healthiest  natural food. It has positive effect on metabolism, growth and longevity. It regulates and balances the functions of the body, oxygenates the cells and increases the natural resistance to external attacks, but also to internal defects. Increases physical and spiritual forces, stimulates memory, stamina, fertility and sexual performance.