British Food Journal Volume 19 Issue 5 1917

At the present time when all kinds of adulterants are being employed by many bakers in the manufacture of bread, and the food rations, and bread rations in particular, are considerably reduced, it is of the utmost importance that the public should take what steps they can to obtain a bread which contains a relatively high percentage of assimilable proteins. Many of the “ war breads ” which have been manufactured of late cannot be characterised as satisfactory and desirable products especially in view of the cases of acute indigestion which have been directly attributed to the use of such bread. One of the “ Die Hard ” fallacies, which continues to be promulgated by some members of the Scientific and Medical professions with obstinate regularity, is that the protein content of a food is an absolute indication as to its nutritive value. Nothing could be much more misleading or erroneous. It is quite possible for a food to contain a high percentage of substances described as proteins and yet to possess very little or no nutritive value for the average person inasmuch as many of the substances described as proteins may be entirely indigestible or nearly so. The nutritive value of any food to any given person is largely dependent upon the idiosyncrasies of the person, the amount of available protein present in the food, and certain other factors.