Apple Cider Vinegar
Besides having amazing healing properties, apple cider vinegar keeps skin supple. It's heavy concentration of enzymes helps peel off dead skin cells. It breaks down fat and helps food digest properly.
Carrots
Maintain the outer layer of the skin to prevent premature aging. What you'll find in is the same as you'll get in Retin A.

Cheese
To ensure a happy smile, add a slice or two of hard cheese into your diet. Choose Swiss, cheddar, or Gouda to block bacteria in the mouth and prevent cavities.
Citrus Fruits
Hold the skin cells together by forming collagen. Collagen cannot be added to the skin topically, which is why fruits and fruit juices are such an important part of the daily diet.
Cranberries
Keep urinary tract lining healthy.