Fruit powder is a naturally secreted layer of waxy substance on the surface of fruits, scientifically known as "skin wax" or "fruit frost". Its essence is a natural protective layer generated by fruits during their growth process to protect themselves, rather than dust or pesticide residues.

The main components of fruit powder are long-chain esters or fatty compounds, and the specific composition varies depending on the type of fruit. For example, the fruit powder on the surface of blueberries is rich in triterpenoids such as oleanolic acid and ursolic acid; The fruit powder on the surface of grapes also contains oleanolic acid.

Fruit powder has multiple protective functions for fruits:

Water locking and moisturizing: The wax layer can effectively reduce fruit water evaporation and maintain freshness and plumpness.
Physical protection: It can reflect some ultraviolet rays and prevent the skin from getting sunburned; And make rainwater quickly slide down, reducing the risk of bacterial adhesion and mold growth.
Freshness indicator: Complete, uniform, and thick fruit powder is usually a sign of fresh fruit and gentle transportation process. Severe shedding of fruit powder may indicate that the fruit has been stored in a larger area or has been subjected to more bumps.
Fruit powder is safe to consume.