Is it wax if there is white on the apple peel scraped with a knife

The white substance that appears on the apple peel after cutting may be natural fruit wax or artificial edible wax, which is usually safe to consume. The wax on the surface of apples mainly includes two types: natural wax secreted by the skin itself and artificially added edible grade fruit wax, the latter of which is commonly used for preservation and enhancing appearance. The apple epidermis itself secretes a layer of natural wax, mainly composed of keratin and lipid compounds, which is part of the plant's self-protection mechanism. This layer of wax can reduce water evaporation, prevent microbial invasion, and present a slight misty white frost on fresh apples. When lightly scraped with a knife, a white powdery substance will appear. Artificial edible wax is a legal additive used by some businesses in the post harvest processing of apples. Common types include palm wax, insect glue, etc. These food grade waxes have undergone safety assessments and will not harm health when used reasonably. The standard for the use of food additives in China clearly stipulates that edible wax should be controlled within 0.4 grams per kilogram, and apples purchased through regular channels usually meet this standard. If the wax layer on the surface of an apple is abnormally thick, has a pungent odor or a sticky feeling, it may be an industrial wax used improperly. Industrial wax contains heavy metals and harmful solvents, and long-term intake may damage the liver and nervous system. When purchasing, you can choose apples with regular labels, or gently wipe the surface with warm water and a soft bristled brush, which can clean without damaging the nutrition of the fruit pulp. Organic apples usually only retain their natural wax, and those who are sensitive to wax can choose them first.

Before daily consumption of apples, it is recommended to rinse with flowing water for more than 30 seconds to remove most of the surface impurities. For people who have concerns about skin wax, they can choose to peel and consume it, but it should be noted that apple peels are rich in dietary fiber and antioxidants, and peeling them will lose some nutrients. When storing apples, keep them dry and ventilated to avoid high temperature environments that accelerate wax oxidation. If there is an abnormal chemical odor on the surface of an apple or discomfort in the throat after consumption, it should be stopped immediately and a professional physician should be consulted.