Dr. Reid Hunt, chief of the Division of Pharmacology, Hygienic Laboratory, United States Public Health and Marine Hospital Service, made some very interesting experiments to determine the physiological changes upon animals which would result from the strictly moderate use of alcohol. These are described in Bulletin No. 33 of the Hygienic Laboratory, published in 1907. Mice and guinea-pigs were used. The food, usually oats, was soaked in diluted alcohol, at first of five per cent. strength, then gradually increased to forty or fifty per cent. By carefully observing the weight of the mice, and not increasing the strength of the alcohol too rapidly, it was possible to keep the animals for months on this diet without any material loss of weight. After the lapse of weeks, in some cases, and months in other cases, these alcohol fed animals were given small doses of a poison known as acetonitrile. Other mice to whom no alcohol was fed were given similar doses of this poison. In the first series the mice which had received alcohol died from about one-half the quantity of acetonitrile required to kill those which had not received alcohol. In the second series with a somewhat stronger dilution the alcohol mice succumbed to one-half to one-third the dose necessary to kill the non-alcoholized animals. In no case was enough alcohol given for any symptoms of intoxication to appear, nor was there any outward indication of any injury being done by the alcohol. In another experiment a mouse was kept for four months on a diet of oats soaked in water, then 0.5 milligram of acetonitrile per gram body weight was injected. The mouse recovered. It was then fed on oats soaked in an alcoholic solution which was gradually increased to 45 per cent. After a little more than a month of this diet 0.2 milligram acetonitrile per gram body weight proved fatal. The weight of the mouse had remained about the same throughout.
Alcohol increased the susceptibility of the guinea pigs also.
Dr. Hunt says on page 33 of the bulletin:—
“These experiments with alcohol and acetonitrile are of interest in another connection. The greatest advance in recent years in our knowledge of the physiological action of alcohol has been the clear demonstration that alcohol is oxidized in the body, and may replace fats and carbohydrates and to a certain extent, the proteids of an ordinary diet. So clear has been this demonstration that the view that alcohol, in moderate amounts, should be regarded as a food is almost universally accepted by physiologists, and the drift of opinion is certainly toward the view that it is in all respects strictly [analogous] to sugar and fats, provided always that the amount used does not exceed that easily oxidized by the body. Under these premises it would be expected that alcohol in a diet would have the same effect upon an animal’s susceptibility to acetonitrile as has dextrose, for example. This is by no means the case, however; on the contrary, the action of these substances in this regard is entirely different. Mice fed upon oats soaked in a solution of dextrose or upon cakes containing considerable dextrose, or upon rice, show a very distinct increase in their resistance to acetonitrile; such mice may recover from two or three times the dose fatal to controls. (Controls are the animals fed in the ordinary way without alcohol or in this case dextrose.—Ed.) While these facts are not sufficient to justify the conclusion that in many cases alcohol has not a true food value, yet they are sufficient to indicate caution in applying, without further consideration, the brilliant and very exact results on the proteid sparing power of alcohol to practical dietaries.”
Various other experiments were made, but there is not room here for a record of them.
In the summary Dr. Hunt says:—
“It is believed that these experiments afford clear experimental evidence for the view that extremely moderate amounts of alcohol may cause distinct changes in certain physiological functions, and that these changes may, under certain circumstances, be injurious to the body. The results also afford further evidence that in some respects the action of alcohol as a food is different from that of carbohydrates, and finally that in all probability certain physiological processes in ‘moderate drinkers’ are distinctly different from those in abstainers.”
Professor Chittenden, of Yale University, has made extensive researches upon alcohol and digestion. A full report of these may be found in the “Physiological Aspects of the Liquor Problem.” In the Medical News, vol. 86, page 721, Professor Chittenden says of the theory that alcohol is a food similar to sugar and fats:—
“It is, I think, quite plain that while alcohol in moderate amounts can be burned in the body, thus serving as food in the sense that it may be a source of energy, it is quite misleading to attempt a classification or even comparison of alcohol with carbohydrates and fats, since, unlike the latter, alcohol has a most disturbing effect upon the metabolism or oxidation of the purin compounds of our daily food. Alcohol, therefore, presents a dangerous side wholly wanting in carbohydrates and fats. The latter are simply burned up to carbonic acid and water, or are transformed into glycogen and fat, but alcohol, though more easily oxidizable, is at all times liable to obstruct, in some measure at least, the oxidative processes of the liver, and probably of other tissues also, thereby throwing into the circulation bodies such as uric acid, which are inimical to health; a fact which at once tends to draw a distinct line of demarcation between alcohol and the two non-nitrogeneous foods—fat and carbohydrate.”