They are digested and absorbed with the help of fats that are in the diet. Vitamin A is needed for strong bones, good vision, and healthy skin. It is found both in dark green and yellow fruits and vegetables. Vitamin D is essential for children because it helps calcium and phosphorus to form straight, strong bones and teeth. With direct sunlight on the skin, the body can manufacture its own vitamin D. Infants and young children often need a vitamin D supplement.
Vitamin D is added routinely to most milk during processing.
Vitamin E helps to protect vitamin A and red blood cells. It is found in a wide variety of foods, and almost everyone gets enough. Small amounts are found as well in the green leaves of spinach, kale, cabbage, and cauliflower and also in pork liver. Fat-soluble vitamins can be stored in the body for long periods. They are stored mostly in the fatty tissue and in the liver.