Royal jelly is a kind of milk secreted by young and middle-aged bees after eating pollen. This kind of milk, like mammalian milk, has great nutritional value and immune function. Bees and queen bees are the same in the egg stage. Eat royal jelly for three days after hatching, eat honey and pollen, and grow into a queen bee. After hatching, they have been eating royal jelly and grow into queen bees. The life span of bees is one to six months, while the queen bee usually lives for five to seven years because she has been eating royal jelly. The color of royal jelly varies slightly according to the pollen eaten by bees, and is generally divided into milky white and yellowish.

Bees take nectar or secretions with water content of about 75% from plant flowers and store them in the second stomach. Under the action of various transformations in the body, after 15 days, when various vitamins, minerals and amino acids are enriched to a certain value, the polysaccharide in nectar is simultaneously transformed into monosaccharide glucose and fructose which can be directly absorbed by the human body, and the water content is less than 23%, which is stored in the nest and sealed with beeswax. Honey is a supersaturated solution of sugar, which will crystallize at low temperature, glucose will crystallize, and fructose is the main part that does not crystallize.