Can apples still be eaten after being nourished?

Apples can usually be consumed after oxidation, but their taste and nutritional value may decrease. The oxidation of apples mainly occurs when polyphenolic substances in the flesh come into contact with air and undergo enzymatic browning reactions, without producing harmful substances. Apple oxidation is a common natural phenomenon in fruits. When cut or bitten apples are exposed to air, polyphenol oxidase in the flesh catalyzes the oxidation of polyphenolic substances, forming brown substances. This process is similar to peeling potatoes and turning them black, which is a normal chemical reaction. After oxidation, the vitamin C content of apples will decrease, but the nutritional components such as dietary fiber and minerals will be basically retained. Slightly oxidized apples have no impact on healthy individuals and can continue to be consumed, but the taste may become lighter and the texture may become softer. If an apple is oxidized and accompanied by a noticeable fermentation odor, moldy spots, or abnormally softened texture, it may have gone bad. This situation is more common in apples that have been stored for too long or in an improper storage environment, where the damaged skin is prone to mold growth. Rotten apples can produce harmful substances such as penicillin, which may cause gastrointestinal discomfort after consumption. Especially for apples with signs of mold, even if the moldy part is removed, the fungal toxin may spread to other parts. It is recommended to discard them directly.

When storing apples in daily life, they can be soaked in light salt water to slow down oxidation, or sealed and stored in refrigeration. Before consumption, the oxide layer can be removed and combined with fruits such as lemon juice and oranges that are rich in vitamin C to improve taste and reduce nutrient loss. For those with gastrointestinal sensitivity, it is recommended to consume freshly cut apples to avoid taste changes caused by oxidation that may affect appetite.