This section is from the book "The Hygienic System: Fasting And Sun Bathing", by Herbert M. Shelton. Also available from Amazon: The Hygienic System Vol III Fasting and Sun Bathing.
After a fast the diet should be of the very best from the standpoint of its nutritive qualities. No canned and bottled juices should be used in breaking the fast. Only fresh fruits and fresh vegetables should be used. If any dried foods are to be employed in the diet, only sun-dried foods should be used. Certainly every food employed should have its full content of vitamins and minerals. Canned foods, sulphured fruits, denatured foods of all kinds, over-cooked foods, and foods that have been hashed or mangled, so that they have sustained vital losses through oxidation, are not to be considered. The loss of minerals and vitamins cannot possibly be compensated by the use of vitamin pills of whatever nature nor by the use of mineral preparations from any source. These things must be obtained from natural foods.
There is greater need for protein after a long fast than for carbohydrates. As the fasting individual who has had a long fast will build tissue rapidly, he will require more protein than that contained in a maintenance diet. High grade proteins will be required and these should be as fresh and wholesome as the market affords. It should hardly be necessary to add that the full portion of protein daily cannot be started from the first day the fast is broken. Caution must be observed in breaking an extended fast and the patient brought gradually from the fast to full meals.