Fruits are one of the oldest forms of food known to man. According to Bible Adam, the first man ate an apple, the forbidden fruit of heaven. There are many references to fruits in ancient literature. Vedas state that the fruits form the base of the Food of Gods. According to Quran, the fruits like grape, date, fig, olive and pomegranate are the gifts and heavenly fruits of God.

Fresh and dry fruits are the natural staple food of human. They contain substantial quantities of essential nutrients in a rational proportion. They are excellent sources of minerals, vitamins and enzymes. They are easily digested and exercise a cleansing effect on the blood and the digestive tract. Persons subsisting on this natural diet will always enjoy good health. Fresh and dry fruits are thus not only a good food but also a good medicine.

The fibrous matter in fruits, cellulose, aids in the smooth passage of the food in the digestive tract and easy bowel action. The sugars and organic acids contained in fruits also increase their laxative effect. Hence, regular use of fruits prevents and cures constipation.

Fruits, as dependable sources of vitamins, exert a tonic effect in the body. Guavas, custard apples and citrus fruits, like lemons and oranges, are particularly valuable sources of vitamin C. These fruits are usually eaten fresh and raw, thus making the vitamins fully available to us.

Fruits are highly beneficial in maintaining acid-alkaline balance in the body. They neutralize the toxic condition of the body resulting from excessive intake of acid-forming foods and restore its alkalinity. They help clear the system of morbid waste and cater to the body's requirement of natural sugar, vitamins and minerals.

In the case of the all-fruit diet, one should take three meals a day of fresh, ripe juicy fruits such as apples, pears, grapes, oranges, grapefruit, pineapple, peaches, melon or any other juicy fruit in season. Banana; should, however, not be taken, nor should any other foodstuff be added to the fruit diet. For drinks, plain water or unsweetened lemon water may be taken.