How do I keep my apple from turning brown after I've sliced it?

Sliced apples turn brown with exposure to air. This is called oxidizing and it is sort of like iron rusting.

To stop the apple from browning, you need to prevent it from touching air. Storing it in an airtight container will help, or covering it tightly in plastic wrap. As a temporary measure, rubbing lemon juice on the cut parts will help change the chemical balance of the apple and slow down the oxidization.

Dipping it in caramel or chocolate works, too!

Lemon juice is the only thing i know of....good luck!

awhh i dont know the scientific explanation..

but lemon juice =]]

spronkle lemon juice over it ,this will work for most fruits and avocado ,I guess its the acid in it.