The Book of Life

by Upton Sinclair

There are few poisons which can affect the system more quickly, or more dangerously, than a mass of food which is not digested. The stomach is an ideal forcing-house for the breeding of bacteria. It provides warmth and moisture, and you, in your meal, provide the bacteria and the material upon which they thrive. Under normal conditions, the stomach pours out a gastric juice which kills the bacteria; but let this gastric juice for any reason be lacking—because your nervous energy has gone somewhere else, or because your blood-stream, from which the gastric juice must be made, has been drawn away to the muscles by hard labor; then you have a yeast-pot, with great quantities of gases and poisons. In acute cases the results are evident enough: violent pains and convulsions, followed by coma and the turning black of the body. But what you should understand is that you may produce a milder case of such poisoning, and may do it day after day habitually, and little by little your vital organs will be weakened by the strain.

It does not make any difference at what hour of the twenty-four you take the great bulk of your food. It is one of the commonest delusions that you get some strengthening effect from your food immediately, and must have this strength in order to do hard work. To be sure, there are substances, such as grape-sugar, which require practically no digesting; you can hold them in the mouth, and they will be digested by the saliva, and absorbed at once into the blood-stream. But unless you have been starved for a long period you do not need to get your strength in this rush fashion. If you ate your normal meals on the previous day, your blood-stream is fully supplied with nutriment which has been put through a long process of preparation, and you can get up in the morning and work all day, if necessary, upon what is already in your system. To be sure, you may feel hungry, and even faint, but that is merely a matter of habit; your system is accustomed to taking food and expects it. But if you are a laborer doing hard work, you can easily train yourself to eat a light meal in the morning, and another light meal at noon, and to eat a hearty meal when your work is done and you can rest. Two light meals and a hearty meal are all that any system needs, and you can prove it to yourself by trying it, and watching your weight once a week.

I have tried many experiments, and the conclusion to which I have come is that there is no virtue in any particular meal-hours or any particular number of meals. For several years I tried the experiment of two meals a day. I was living a retired life, and had little contact with the world, and I would make a hearty meal at ten o'clock in the morning, and another at five in the afternoon. But later on I found that inconvenient, and now I take a light breakfast, and two moderate-sized meals at the conventional hours of lunch and dinner. I can arrange my own time, so after meal times is when I get my reading done. Sometimes, when I am tired, I feel sleepy after meals, but I have learned not to yield to this impulse. I do not know how to explain this; I have observed that animals sleep after eating, and it appears to be a natural thing to do; but I know that if I go to sleep after a meal, nature makes clear to me that I have made a mistake, and I do not repeat it. I never eat at night, and always go to bed on an empty stomach, so I am always hungry when I open my eyes in the morning. I never know what it is not to be hungry at meal times, and my habits are so regular that I could set my watch by my stomach.

Another common habit which is harmful is eating between meals. I have known people who are accustomed to nibble at food nearly all the time. Shelley records that he tried it as an experiment, thinking it might be a convenient way to get digestion done—but he found that it did not work. The stomach is apparently meant to work in pulses; to do a job of digesting, and then to rest and accumulate the juices for another job. It will accustom itself to a certain régime, and will work accordingly, but if, when it has half digested a load of food, you pile more food in on top, you make as much trouble as you would make in your kitchen if you required your cook to prepare another meal before she has cleaned up after the last one. Three times a day is enough for any adult to eat. Children require to eat oftener, because their bodies are more active, and they not merely have to keep up weight, but to add to it. The simplest way to arrange matters with children is to give them three good meals at the hours when adults eat, and then to give them a couple of pieces of fruit between breakfast and lunch, and again between lunch and supper. I have never seen a child who would not be satisfied with this, when once the habit was established.

I have already spoken of the cooking and serving of food. I consider that the "gastronomic art," as it is pompously called, is ninety-nine per cent plain rubbish. To be sure, if foods are appetizingly prepared, and look good and smell good and taste good, they will cause the gastric juices to flow abundantly, as the Russian scientist Pavlov has demonstrated by practical experiment with the stomach-pump. But I know without any stomach-pump that the best thing to make my gastric juices flow is hard work and a spare diet. When I come home from five sets of tennis, and have a cold shower and a rub-down, my gastric juices will flow for a piece of cold beefsteak and a cold sweet potato, quite as well as for anything that is served by a leisure class "chef." Needless to say, I want food to be fresh, and I want it to be clean, but I have other things to do with my time and money than to pamper my appetites and encourage food whims.

If you have a grandmother, or ever had one, you know what grandmothers tell you about "hot nourishing food"; but I have tried the experiment, and satisfied myself that there is absolutely no difference in nourishing qualities between hot food and cold food. If you chew your food sufficiently, it will all be ninety-eight and six-tenths degree food when it gets to your stomach, and that is the way your stomach wants it. Of course, if you have been out in a blizzard, and are chilled, and want to restore the body temperature, a hot drink will be one of the quickest ways, and if the emergency is extreme, you may even add a stimulant. On the other hand, if you are suffering from heat, it is sensible to cool your body by a cold drink. But you should use as much judgment with yourself as you would with a horse, which you do not permit to drink a lot of cold water when he is heated up, and is going into his stall to stand still.

I have mentioned the word "stimulants," and this opens a large subject. There are drugs which affect the body in two different ways: some excite the nerves, and through the nerves the heart and blood-stream, to more intense activity; others have the effect of deadening the nerves, and dulling the sense of exhaustion and pain. One of these groups is called stimulants, and the other is called narcotics; but as a matter of fact the stimulants are really narcotics, because they operate by dulling the nerves whose function it is to prevent the over-accumulation of fatigue poisons; in other words, they keep the nerves and muscles from knowing that they are tired, and so they go on working.

It is possible, of course, to conceive of an emergency in which that is necessary. Once upon a time, on a hunting trip, I had been traveling all day, and was caught in a rain storm, and exhausted and chilled to the bone; I had to make camp without a fire, so when I got the tent up I wrapped myself in blankets and drank a couple of tablespoons full of whiskey. That is the only time I have ever taken whiskey in my life, and it warmed me almost instantly, and did me no harm. In the same way there were two or three occasions when I was on the verge of a nervous breakdown, and could not sleep, and let the doctor give me a sleeping powder. But in each case I knew that I was fooling with a dangerous habit, and I did no more fooling than necessary. No one should make use of either stimulants or narcotics except in extreme emergency, and never but a few times in a lifetime. What you should do is to change your habits so that you will not need to over-strain.

All these drugs are habit forming; that is to say, they leave the body no better, and with a craving for a repetition of the relief. When you are tired, it is because your muscles and nerves are storing up fatigue poisons more rapidly than your blood-stream can get rid of them. You need to know about this condition, and exhaustion and pain are nature's protective warning. If you put a stop to the warning, you are as unintelligent as the Eastern despots who used to cut off the head of the messenger who brought bad tidings. If, when you have a headache, you go into a drug store and let the druggist mix you one of those white fizzy drinks, what you are doing is not to get rid of the poisons in your blood-stream, but merely to reduce the action of your heart, so as to keep the blood from pressing so fast into the aching blood vessels and nerves. You may try that trick with your heart a number of times, but sooner or later you will try it once too often—your heart will stop a little bit quicker than you meant it to!

Drugs are poisons, and their action depends upon their poisoning some particular portion of the body, and temporarily paralyzing it. And bear this in mind, they are none the less poisonous because they are "natural" products. You can kill yourself by cyanide of potassium, which comes out of a chemist's retort; but you can kill yourself just as dead with laudanum, which comes out of a plant, or with the contents of the venom sac of a snake. You are poisoning yourself none the less certainly if you use alcohol, which is made from the juices of beautiful fruits, and has had hosts of famous poets writing songs about it; or you can poison yourself with the caffein which you get in a lovely brown bean which comes from Brazil, fragrant to the nostrils and delicious to the taste. You may drink wine and tea and coffee for a hundred years, and have your picture published in the newspapers as a proof that these habits conduce to health; but nothing will be said about the large number of people who practiced these habits, and didn't live so long, and about how long they might have lived if they hadn't practiced these habits.