The oily or greasy feel on some apples is due to a natural wax coating the apple produces itself. This wax is produced both before and after harvest, and during storage.
Apples naturally produce a waxy coating as a protective mechanism. This wax:
- Helps to prevent water loss: This keeps the apple hydrated and prevents shriveling.
- Provides a barrier against pathogens: The wax creates a physical barrier that makes it harder for bacteria and fungi to penetrate the apple's skin.
- Contributes to the apple's appearance: While sometimes perceived as oily or greasy, the wax also gives the apple a shiny and appealing look.
The amount of wax produced can vary depending on:
- Apple variety: Some apple varieties are naturally waxier than others.
- Maturity: Wax production generally increases as the apple matures.
- Storage conditions: Certain storage conditions can promote wax development.
- Handling: Excessive handling can spread the wax unevenly, making it appear more noticeable in some areas.
While this natural wax is harmless and edible, some consumers find the texture unpleasant. Washing the apple can reduce the oily feel, though it may also diminish its natural protective layer.
