Carrots turn white after peeling and storing due to dehydration. The outer layer, which contains pigments and helps retain moisture, is removed, causing the carrot to dry out and develop a white, chalky appearance.
When you peel a carrot, you remove its protective outer layer. This layer contains pigments like carotenoids, which give the carrot its vibrant orange color. It also acts as a barrier, helping to retain moisture within the carrot. Once this layer is gone, the carrot is more susceptible to dehydration. As the carrot loses moisture to the surrounding air, the surface becomes dry and develops a white or pale appearance. This 'white blush' is essentially a sign of surface dehydration. The underlying carrot is still perfectly safe to eat, but the texture might be slightly less crisp. The rate at which this happens depends on the humidity of the storage environment. Drier environments will accelerate the process.
To prevent carrots from turning white after peeling, store them in an airtight container filled with water in the refrigerator. This helps maintain their moisture content and prevents dehydration. Change the water every few days for optimal freshness.