It is remarkable that man, in his present state of civilization, does not instinctively recognize the kind of food which is beneficial or prejudicial to his well-being. Experience alone teaches him what is good or bad. With the lower animals it is otherwise; they have the power to discern that which is suitable for food. The colt and the kid know how to select, among the varied herbage, the particular grasses which are suitable to their organization. Domesticated animals, having but an insufficiency of food, do sometimes partake of noxious plants. It may be that man, in consequence of his civilization, has lost that instinct possessed by the lower animals, and in blind confidence partakes of everything which is served to him in the shape of food; and this view derives support from the fact, that savages, and people but partially civilized, refuse to eat anything they are unacquainted with, no matter how temptingly it may be prepared.
The uneducated peasantry of France, at this day, will not taste food to which they are unaccustomed, or if they do, it is only with great mistrust.
It is matter of daily experience, that man can simultaneously feed upon both vegetable and animal matter, and can also live when restricted to one of these alone; such restriction, however, being better borne under the varied conditions of age, season and climate.
From these considerations it follows that, for the accomplishment of a given purpose, man has the privilege of selecting certain alimentary substances, and of refusing many others; the health of the individual, who may thus submit to the diet of his choice, being in no wise affected thereby.
Bearing in mind the well established principles of physiology and chemistry, together with the precepts set forth in the preceding pages, we may be safely guided in the selection of such alimentary substances as will conduce to the fixity of a certain condition of embonpoint, although having a tendency to redundancy; or which, on the other hand, will insure a diminution of obesity. Such results can be obtained by paying attention to the following remarks:
That kind of meat known as game is very nutritious, occupies but small space, and consequently only moderately distends the alimentary canal. It contains but a small amount of carbon, relatively to the other compounds, and therefore should be used as much as possible: such as venison, hare, the warren rabbit, woodcock, snipe, partridge, quail, plover, wild duck, &c.
The fluid portion of all ragouts should be avoided by those who dread corpulence, and game should therefore be roasted rather than stewed. The same may be said of butcher's meat, such as surloin of beef, beefsteak, veal cutlet, mutton chop, fresh pork, leg of mutton, &c. Gelatinous dishes, such as calves' feet and tripe, should be avoided. Poultry, when roasted, is not contra-indicated.
It is a matter of observation, that those races which live chiefly upon fish are gross and dull, pale and lymphatic, and less courageous than such as live upon flesh. A fish diet is consequently favourable to the development of fat, and the usual accompaniment of butter sauce is also productive of a like result.
The anti-obesic treatment, therefore, requires that fish should be partaken of sparingly; still it has been remarked that patients, while undergoing treatment, who eat principally of meat, with a very small amount of fish, do nevertheless succeed in the accomplishment of the object they have in view. The most nutritious fish are turbot, trout, sole, salmon, perch, pike, tench and carp. On the other hand, shell fish, such as oysters, lobsters, crabs and shrimps, have a tendency to impede the formation of fat.
Vegetables, such as lettuce, chicory, sorel, artichokes, spinach, green pease, beans, cabbage, celery, and all such as are used by way of salad, are not very nutritive, but contain much watery and mucilaginous matter, favourable to the development of corpulency: the same may be said of carrots, turnips, potatoes, rice, beet-root, maccaroni and vermicelli bread; all kinds of cakes, pastry and biscuits, which are made of wheaten flour, are decidedly contra-indicated, as are also eggs, cream, cheese and butter.