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How does lemon juice prevent apples from turning brown?

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Cut apples turn brown because of a reaction called oxidation. Oxygen in the air reacts with a natural substance in apples called phenolase and turns the cut surface brown. Mild acids like lemon juice can stop this reaction; tossing cut apple chunks with a little lemon juice will keep the apples from turning brown.as we know that lemon has high vitamin C so in both ways is good and healthy.

Applying lemon juice holds for pears, potatoes, eggplant, and other fruits and vegetables which turn brown just like apples do. If lemon juice is not available, you can also try using salt water which also does a good job in avoiding the browning effect. -