"" The loss of weight during a fast does not represent a loss of vital tissue, but of surplus nutriment, waste, fat, etc. It is just so many pounds of "disease" that one loses. The muscles, for example, decrease in size. But this is due to a decrease in the amount of fat in them, and to a decrease in the size of their cells. There is no actual lessening of the number of muscle cells during the ordinary fast.""
""The weight lost during a fast is rapidly regained, if it is desirable to do so. There is not the slightest danger from loss of weight.""