How to Live Part 4

Section III--Hard, Bulky, and Uncooked Foods

The wise choice of foods does not consist entirely in balancing the ration as to protein, fat, and carbohydrate.

[Sidenote: Hard Foods]

Hard foods, that is, foods that resist the pressure of the teeth, like crusts, toast, hard biscuits or crackers, hard fruits, fibrous vegetables and nuts, are an extremely important feature of a hygienic diet. Hard foods require chewing. This exercises and so preserves the teeth, and insures the flow of saliva and gastric juice. If the food is not only hard, but also dry, it still further invites the flow of saliva. Stale and crusty bread is preferable to soft fresh bread and rolls on which so many people insist. The Igorots of the Philippines have perfect teeth so long as they live on hard, coa.r.s.e foods. But civilization ruins their teeth when they change to our soft foods.

[Sidenote: Bulk Versus Concentrated Foods]

Most of the ordinary foods lack bulk; they are too concentrated. For this purpose it is found that we need daily, at the very least, an ounce of cellulose, or "woody fiber." This is contained in largest measure in fibrous fruits and vegetables--lettuce, celery, spinach, asparagus, cabbage, cauliflower, corn, beets, onions, parsnips, squash, pumpkins, tomatoes, cuc.u.mbers, berries, etc.

Until recently would-be food reformers have made the mistake of seeking to secure concentrated dietaries, especially for army rations. It was this tendency that caused Kipling to say, "compressed vegetables and meat biscuits may be nouris.h.i.+ng, but what Tommy Atkins needs is bulk in his inside."

[Sidenote: Raw Foods]

[Sidenote: Vitamins]

Cooking is an important art; but some foods when cooked lose certain small components called vitamins, which are also found in the skin or coating of grains, especially rice, also in yolk of egg, raw milk, fresh fruit, and fresh vegetables, especially peas and beans. These vitamins are very important to the well-being of the body. Their absence is probably responsible for certain diseases, such as beriberi, scurvy, and possibly pellagra, as well as much ill health of a less definite sort.

Some raw or uncooked foods, therefore, such as lettuce or tomatoes, celery, fruits, nuts, and milk, should be used in order to supply these minute and as yet not well-understood substances which are destroyed by the prolonged cooking at the temperature which is employed in order to sterilize canned foods. They are also diminished and often destroyed by ordinary cooking, except in acid fruits and acid vegetables.

[Sidenote: Raw Milk]

It is true that only very clean milk is entirely safe in an absolutely raw state, and that heat is usually needed to kill the germs. But this heat, even at the comparatively low temperature of pasteurization, has been found to destroy the vitamins that prevent scurvy. Orange juice should always be given to infants over one month old who are fed pasteurized milk.

Not all foods can be taken raw with advantage. Most starchy foods, such as cereals and potatoes and unripe fruit must, of course, be cooked in order to be made fit to eat.

[Sidenote: Disinfection]

Raw foods have dangers of their own in carrying germs and parasites, and it is extremely advisable that all raw foods should be very thoroughly washed before eating.

[Sidenote: Acids and Inorganic Salts]

In addition to protein, fat, carbohydrate, and vitamins, there are other elements which the body requires to maintain chemical equilibrium, and for the proper maintenance of organic functions. These are the fruit and vegetable acids and inorganic salts, especially lime, phosphorus, and iron. These substances are usually supplied, in ample amounts, in a mixed diet, containing a variety of fruits and vegetables and an adequate amount of milk and cream. Potatoes, feared by some in acid condition (such as gout), are actually valuable because of their alkalinity.

Section IV--Thorough Mastication

Whether it be from lack of hard foods, requiring prolonged chewing, or from the nervous hurry of modern life, or from other causes, it is undoubtedly a fact that most people in America eat too rapidly. The correction of this habit will go far toward reforming an individual's diet in every way.

Thorough mastication means masticating up to the point of involuntary swallowing. It does not mean forcibly holding the food in the mouth, counting the chews, or otherwise making a bore of eating. It merely means giving up the habit of forcing food down, and applies to all foods, even to liquid foods, which should be sipped.

[Sidenote: Evils of Insufficient Mastication]

The consequences and evils of insufficient mastication are many, and may be enumerated as follows: Insufficient use of the teeth and jaws (and hence dental decay as well as other and worse dental evils); insufficient saliva mixed with the food (and hence imperfect digestion of the starchy substances); insufficient subdivision of food by mastication (and hence slow digestion); the failure of the taste nerves to telegraph ahead, as it were, to the stomach and other digestive organs an intimation of the kind and amount of digestive juices required (and hence indigestion); the overseasoning of food to make it relishable even when bolted (and hence overeating and irritation of the mucous lining); the excessive use of meat and eggs and like foods, which can be eaten rapidly with relative impunity, and the corresponding neglect of other foods, like bread, grains, vegetables, and salads, which require more mastication (and hence intestinal poisoning).

[Sidenote: Prolonged Relish of Food]

The habit of insufficient mastication is subtle, because it has become "second nature" with most of us. To free ourselves of it we must first of all allow plenty of time for our meals and rid our minds of the thought of hurry. A boy's school in which the princ.i.p.al is endeavoring to fight the habit of food-bolting has wisely ordained that no boy may leave the dining-room until a certain hour, even if he has finished eating long before. In this way the boy soon learns that there is nothing to be gained by fast eating, and, in fact, that the pleasantest way of spending the meal-time is to prolong the relish of the food. It would be well if all of us would adopt a similar rule for ourselves.

Mr. Gladstone did something of the sort and was noted for the slow mastication of his food. Latterly Mr. Horace Fletcher set such a rule for himself, and revived the interest of the public in the subject.

[Sidenote: The First Three Mouthfuls]

At first one must give some conscious attention to his efforts to reform; but if one will merely attend carefully to the first three mouthfuls of a meal, the slow pace can often be established for the rest of the meal without further thought.

[Sidenote: Careful Tasting]

Slow eating is important not merely as a matter of mastication, but also as a matter of taste and enjoyment. Food must have a pleasing taste and flavor and then must be enjoyed in order to be most readily a.s.similated.

[Sidenote: Increased Enjoyment]

There is a mistaken notion that the hygiene of food means "giving up all the things that taste good." While it is true that, in many cases, sacrifices have to be made, the net result of reforming one's diet is not to diminish but to increase the enjoyment of food. In general, it is extremely unhygienic to eat foods which are not relished. Experiments by Pavlov and others have shown that the taste and enjoyment of food stimulate the flow of digestive juices.

[Sidenote: Choosing Foods]

Finally, slow eating is a great aid in the proper choice of foods. Some suggestions have already been given as to the wise choice of foods, but no rules can be formulated which will completely insure such a choice.

Even the wisest physiologist can not depend altogether on his knowledge of food values, while, to the layman, the problem is so complicated that his main reliance must be on his own instincts. Animals depend exclusively on instinct except when under domestication. Civilized man should not and can not altogether depend upon instinct, but his food instincts are far more keen and correct if he obeys the rule of eating slowly than if he bolts his food.

[Sidenote: "Good" and "Bad" Foods]

In the choice of foods it is as difficult to distinguish absolutely between what are "good" and "bad" foods as it is to cla.s.sify human beings into "good" and "bad." All we can say is that some foods are better than others, remembering that it is usually more important to be _satisfied_, even if the foods are not "ideal," than to be unsatisfied with what in the abstract seem "ideal" foods.

Among the best foods for most people are fruits, potatoes, nuts (if well masticated), milk, sour milk, and vegetables. Among the worst foods are putrefactive cheeses, sweetbreads, liver, kidneys, "high" game or poultry.

But a fastidious study of foods will find some faults as well as some virtues in almost any food. The best way to help the ordinary man choose his foods is to advise him to use as much as possible of the "better"

and as little as possible of the "worse" without attempting to draw a hard and fast line between the "good" and "bad."

[Sidenote: Salt, Pepper, Spices]

Salt, pepper, and hot condiments should be used very sparingly, if at all.

[Sidenote: Sugar and Candy]

A great cause of ill health is overuse of sugar in concentrated form, candy, etc., especially by the sedentary. One reason why sugar has a high food value is that it is readily utilized for combustion, and if taken between meals greatly increases the calories and may lead to _overnourishment_.

[Sidenote: Water with Meals]

There is, for normal people, no objection to drinking a moderate amount of water at meals--say one or two gla.s.sfuls--provided it is not taken when food is in the mouth and used for was.h.i.+ng it down.

[Sidenote: The Digestibility of So-called "Indigestible" Foods]

The science of dietetics will develop rapidly in the future, and in a few years it will probably be possible to be more definite than we have been here. At present there is much unknown, especially as to how far our rules have to be modified for the particular individual. Personal idiosyncrasies have to be taken into account. Sometimes "What is one man's meat is another man's poison." On the other hand, many have mistaken ideas as to their own idiosyncrasies. For instance, many people think that nuts never agree with them, when the trouble really is that they do not masticate them properly. Many think peanuts indigestible, not realizing either the importance of mastication or the importance of avoiding over-roasting. The ordinary peanuts are over-roasted. Peanuts very slightly roasted and very thoroughly masticated seldom disagree with one. Others believe that bananas never agree with them, when the fact is they eat them too green. The banana vender usually finds that the ignorant public buys his fruit best when its color is an even yellow, and he puts aside for himself the only bananas ripe and fit to eat, namely those which are mottled with black.

[Sidenote: Avoidance of Fads]

Each individual must use his own intelligence and common sense, avoiding so far as he can the mistake of following a "fad" and accepting a theory without sufficient evidence; and the opposite mistake of accepting as hygienic the customs about him simply because they are customs, and thus mistaking for fads any conclusions of science which are discordant with current custom.

[Sidenote: Necessity of Medical Examination]