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.
In previous chapters four important facts about fasting have been fully established, as follow:
1. Fasting, as a period of physiological rest, affords the tissues and organs of the body an opportunity to repair, renew and replenish themselves. Damaged organs are repaired, worn out and diseased cells are discarded and cast out.
2. Fasting, as a period of physiological rest, affords an opportunity for recuperation of depleted energy.
3. Fasting, because it compels the body to rely upon its internal resources, forces the tearing down (by autolysis) of growths, effusions, infiltrations, deposits, accumulations and excesses. These are thoroughly overhauled, their usable constituents are employed in nourishing the vital tissues, their unusable portions are excreted.
4. Fasting, by the foregoing and related processes, enables the body to regenerate itself to a marked degree. It becomes younger in physiological condition. Its functions are improved, its structures repaired, and its fitness to live increased.
Two replies may be made to those investigators who stress the ephemerality of the cellular regeneration that results while fasting. The first of these was made by Dr. Christopher Gian-Cursio. He says: "it does not take more than a transitory regeneration to remove a structural abnormality and to increase functional efficiency. Even where the structural impairment cannot be completely removed, there is, nevertheless, great functional betterment through compensation. The activity that removes the toxic influence may be transitory, but the removal of that toxin is permanent." The other reply is that these investigators, in making their experiments, have guaranteed the transitory character of the regeneration that results, by the post-fasting feeding and other care that have been given to their subjects. Always have they sent their "washed sows" back to "their wallowing in the mire." Nothing should be expected to produce permanent regeneration if, after the regeneration has been achieved, the renovated organism returns to the habits of living that accounted for the prior degeneration. Unfortunately, biologists who have observed the structure and function of cells during and after fasting, fail to recognize the part played by unbiological and unphysiological habits of mind and body in inducing pathological changes in the cells and tissues.