Royal jelly is a nutrient-rich secretion produced by worker honeybees and fed to larvae, the food that directs a larva to develop into a queen. It is marketed as a health food and credited with various beneficial properties, though strong clinical evidence for most claims is limited. As a bee product it can trigger allergic reactions in sensitive individuals, particularly those allergic to bee stings or pollen. Quality products are harvested hygienically, cooled promptly, and stored cold to protect their delicate composition.