Not overnight, but as your body gets cleaner and your diet improves, the body is able to absorb the nourishment and it rebuilds. One organ that reflects health is the skin.
The skin takes several months to regenerate once you reach a state of health. During this time, you will see the skin quality improve and superficial wrinkles may reduce. Even if the wrinkles are too deeply etched to be reversed, the glowing health of your skin will make them seem less of an issue.
Make sure to eat small amounts of good fats with every meal. Good fats, especially in the form of seeds or nuts, with lightly cooked veggies helps the body absorb the nutrients. Fats also stimulate bile flow to help the liver eliminate the toxins in your body.