Retinol is in the vitamin A family. It or other forms of vitamin A are needed for eye sight, maintenance of the skin, and human development. It is converted in the body to retinal and retinoic acid through which it acts. Dietary sources include fish, dairy products, and meat.
Fruit juice can be helpful for children who are constipated and fruit juice diluted with fluoridated water is a good way to get your child fluoride if he doesn't like to drink plain water. American Academy of Pediatrics. Policy Statement. The Use and Misuse of Fruit Juice in Pediatrics.
Three to five glasses of this diluted juice is drunk every day, along with plenty of water, at least 2 quarts (which is the same amount as eight 8-ounce glasses). A couple cups of herbal tea is usually also permitted. The Juice Fasting Daily Plan gives a detailed breakdown for when and how much juice to drink.