This section of the book is from the "Handbook of Nature Cure Volume One: Nature Cure vs. Medical Science" book, by John L. Fielder.
The manufacturer of tissue salts claims that the only difference between inert minerals and organised salts is in the fineness of the particles: that and nothing else. So he grinds up the material—in a suitable medium, laboriously and with much display—and claims that in this finely divided form the salts can be used by the body. Any one with the most elementary knowledge of physical chemistry knows that a mineral salt can be readily divided into the smallest possible particles—individual ions—by simply dissolving it in water. (But possibly the tissue-salt-maker believes that he shakes up the nuclear structure of substances, too?) Tissue salts are not entirely worthless—but their value is approximately the same as that of a slightly hard drinking water. That is, they may provide a small concentration of mineral salts within the alimentary canal, and so reduce any tendency to "leaching" by a too-soft and over-consumed water supply. (It is an interesting coincidence that many of those who advocate the use of tissue-salts also uphold the drinking of distilled water. The combination of these two follies is a less serious problem for the body than either by itself. Distilled water, which would otherwise tend to withdraw salts of organic origin from the body, may be "appeased" to some extent by the minerals in the medicament. A direct cancellation of the two factors is unlikely, but the net general effect is probably little different from that of drinking an equal volume of ordinary tap water.) Here again, the advice given with the salts may be useful but, as with homeopathy, the tendency to put one’s faith in the wrong factor is a most undesirable feature.