How do you keep apples from discolouring when sliced?

To prevent sliced Apples from discoloring, you can apply lemon juice, which contains citric acid that inhibits oxidation. Alternatively, soaking the slices in a mixture of water and salt or using a commercial anti-browning product can also be effective. Another method is to store the slices in an airtight container with minimal exposure to air. Keeping them cold in the refrigerator can further slow down the browning process.