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Carbotoxicity

The harm of eating carbohydrates.

Carbotoxicity

Recent History

September 3, 1931

Sam Apple

Find Sugar is Fuel for Cancer - Develops Fastest Where Blood Has High Sugar Content - ADVISE DIET LOW IN CARBOHYDRATES

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"The general conclusion is that cancer patients, particularly those with a high level of blood sugar, should be put on a low carbohydrate diet which should contain little or no sugar."

BUFFALO, Sept. 3 (P), Sugar is "fuel' for cancer, and its regulation in diet essential for cancer treatment, the American Chemical society was told yesterday. The report came from the cancer research department of the University of Pennsylvania, from work done by Gladys E. Woodward and Edith G. Fry, under direction of Dr. Ellice McDonald. 


"In cancer," said Dr. McDonald, in explaining the technical report, "the essential difference between tumor tissue and normal tissue is the ability of cancer to digest the animal sugar (or glycogen) in a different and more expeditious way than normal. "The greater the amount of sugar there is in the blood of cancer patients, the shorter is the expectation of their lives. There is a greater growth of the cancer when there is a large amount of sugar in the blood. The tumor grows faster, and there are a greater number of dividing cells. Cancer patients with a low blood sugar respond well to treatment and have a better chance of survival, with slow growth of the tumor.


"The amount of the sugar in the blood of cancer patients should be periodically measured, particularly before and after any treatment, for if the blood sugar increases after any treatment of the tumor, this should be corrected before any further treatment is instituted, and any new treatment should be based on the results of the tests. 


"The general conclusion is that cancer patients, particularly those with a high level of blood sugar, should be put on a low carbohydrate diet which should contain little or no sugar."

January 1, 1935

Diet, delusion and diabetes

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The invention of insulin means that doctors can allow type 1 diabetics to eat more carbohydrates, apparently because it greatly increased their well-being because a low carb diet is apparently miserable. Dr Rabinowitch was prescribing diets with as much as 400 grams of carbohydrates!

"The benefit was dramatic, next only to insulin in the minds of its recipients, for it combined greatly increased well-being with escape from the miseries of an endless low carbohydrate diet.


The carbohydrate component soon escalated, and a typical diet prescribed by the Canadian physician Israel Rabinowitch in the mid-1930s might contain 2,230 calories, 400 g of carbohydrate, 50 g of fat and 70 g of protein, with 67% of energy derived from carbohydrate [20]."


Meanwhile, in the interest of showing both sides, a vegan site says this is a good thing:

https://www.wholefoodplantbaseddiet.com/tag/dr-i-m-rabinowitch-and-diabetes/#footnote_1_6199


In a seminal paper published in 1935 2 , Dr Rabinowitch demonstrated that simple dietary changes (increasing the ratio of complex carbohydrates while reducing calorie intake) could reverse type 2 diabetes.

In his summary he states:

I believe that in the data presented here there is incontrovertible evidence that the high carbohydrate-low calorie diet is more effective in controlling diabetes than all other methods of treatment hitherto reported…it is, therefore, more economical from the point of view of the cost of insulin…

August 2, 1950

Blood lipids and human atherosclerosis

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Dr John Gofman created the original diet-heart and lipid hypothesis, but included carbohydrates as a factor driving cardiovascular disease.

https://www.crossfit.com/health/ancel-keys-cholesterol-con-part-4

Dr Tim Noakes:

In a previous column (3), I described how already in 1950, John Gofman, MD, had formulated the diet-heart and lipid hypotheses (4) two years before Keys would commandeer the ideas as his own.

Gofman posed as a double challenge for Keys and his future disciples. First, Gofman was far more qualified than Keys to undertake research into the dietary and other factors causing heart disease. But perhaps more importantly, Gofman’s diet-heart hypothesis gave equal weight to dietary fats and dietary carbohydrates as the factors driving atherosclerosis and the development of CHD.

According to Gofman:

What is solidly established is that the Sf° 20-400 lipoprotein levels [i.e., blood triglyceride or VLDL concentrations] on the average, can be raised by increasing the dietary carbohydrate intake and can be lowered by decreasing it. … Furthermore, many individuals who are characterized habitually by some type of error in their metabolism that makes their Sf° 20-400 lipoproteins habitually extremely high will experience a marked reduction in the blood levels of these lipoproteins when the carbohydrate intake is lowered. (5, p. 123, my addition)

Gofman continues:

These same lipoproteins are essentially unaffected, in the average case, by changing from animal to vegetable fats. This information is extremely crucial, for in many individuals the risk of coronary heart disease comes primarily from the Sf° 20-400 lipoproteins [VLDL or triglycerides]. For such individuals, any attempt to lower heart attack risk by shifting from animal fat to vegetable fat in the diet would be illogical. There would be no reason whatever to expect any benefits since one would be changing the diet in a manner directed toward affecting the Sf° 0-20 [LDL] lipoproteins, which is not the problem at hand for these persons. For such individuals, the preventive efforts would have to be directed toward lowering the carbohydrate intake, which will, on the average reduce the Sf° 20-400 lipoprotein levels. With respect to the effect of carbohydrates on the Sf° 20-400 lipoproteins, it is a matter of the amount of carbohydrate that is eaten rather than the total number of calories ingested. For example, if one maintains individuals at exactly the same number of calories per day, so that they do not alter the weight in any way, but takes out some of the carbohydrates in their diet and replaces them by vegetable oil, one finds that the Sf° 20-400 lipoprotein levels will fall. Achievement of this result of lowering the Sf° 20-400 lipoproteins requires neither any alteration in caloric intake nor any alteration in body weight. (5, p. 124, my additions and emphasis)


Subsequently, in 1958 Gofman pointed out a key logical flaw that has since been ignored (6). He noted that a number of studies had found increasing the dietary intake of vegetable oils produced a fall in blood cholesterol concentrations, and this has been interpreted as beneficial. But the addition of vegetable oils also reduced total carbohydrate intake, and since carbohydrate increases the Sf° 20-400 lipoprotein levels, which contain approximately 13% of cholesterol by weight, the shift from a higher- to a lower-carbohydrate diet might be the real reason why increasing the intake of vegetable oils causes a reduction in blood cholesterol concentrations.


Thus, Gofman warned: “No consideration was given by them to the possibility that the lowering of cholesterol levels might have been the result of the simultaneous removal of a large amount of carbohydrate from the diet” (6, p. 277).


Gofman next describes the effects of a low-carbohydrate (100 g/day) diet in a 65-year-old male subject with a previous myocardial infarction (Figure 2).


Figure 2: The effects of a low-carbohydrate diet in a myocardial infarction survivor. Note the low-carbohydrate diet produced a very large decrease in the Sf° 20-400 lipoprotein levels, now known as the VLDL-lipoproteins, which transport predominantly triglycerides. Total blood cholesterol concentration was unaffected by this dietary change. Despite this, the patient’s atherogenic index (AI) had fallen, placing him in a more favorable metabolic state according to Gofman’s understanding. Reproduced from data on Table V in reference 6, p. 279.


As Gofman wrote: “It can be seen from these data that a massive fall in the serum Sf° 20-400 lipoprotein levels occurs on the low-carbohydrate diet, without significant changes in the Sf° 0-20 lipoprotein levels. Accompanying this fall in lipoproteins is a highly marked and favourable reduction in the atherogenic index value” (6, p. 278-279).

Thus, the real originator of the diet-heart and lipid hypotheses stated that a low-carbohydrate, high-fat diet can be used in persons with established coronary atherosclerosis, presumably to reverse that disease.


He continued:

These same principles of carbohydrate restriction have been applied successfully in several types of extreme derangement of lipoprotein level control of the Sf° 20-400 lipoprotein class, namely, in xanthoma tuberosum, essential hyperlipidemia, and in diabetes mellitus … . For such a [post-myocardial infarction] patient, it is quite clear that management of the problem of coronary disease by dietary means involves the use of a low-carbohydrate diet, and not a low-fat, high-carbohydrate diet which is so often prescribed when attention is not paid to the lipoprotein findings. (6, p. 279-280, my emphasis)

The importance of this is that this evidence anticipated Peter Kuo’s “discovery” of carbohydrate-sensitive hyper(tri)glyceridemia (7) and its reversal with a low-carbohydrate diet by nine years (Figures 6 and 7 in reference 8).

In his conclusions Gofman wrote:

The increase in risk of future myocardial infarction associated with elevation of lipoproteins of the Sf° 20-400 lipoprotein classes provides the basis for a rational application of dietary measures in this disease … . Dietary carbohydrate intake is a prime factor controlling the serum level of the Sf° 20-100 and Sf° 100-400 lipoprotein classes. Restriction of dietary carbohydrates can provoke marked falls in the serum level of these lipoproteins … . The serum cholesterol measurement can be a dangerously misleading guide in evaluation of the effect of diet upon the serum lipids … . Rational management of patients with coronary heart disease or of individuals attempting to avoid coronary disease depends upon knowledge of the lipoprotein distribution in the individual patient. (6, p. 282-283)


Elsewhere Gofman wrote: “Neglect of [the carbohydrate factor] can lead to rather serious consequences, first in the failure to correct the diet in some individuals who are very sensitive to the carbohydrate action; and second, by allowing certain individuals sensitive to the carbohydrate action to take too much carbohydrate as a replacement for some of their animal fats” (9, p. 156-157).

In one of his last publications, a 1960 editorial, he again emphasized his concern about the carbohydrate factor:

Several investigators have shown that a low-fat high-carbohydrate diet produces opposite trends in the blood cholesterol and the blood lipid levels. The cholesterol level falls because the low fat diet depresses the level of the cholesterol rich Sf° 0-20 lipoproteins. The triglyceride level rises because the high carbohydrate intake elevates the level of the triglyceride-rich Sf° 20-400 lipoproteins. Both the triglyceride-bearing and cholesterol-bearing lipoproteins have been associated with the development of coronary disease. It therefore behoves the physician utilizing the dietary approach to understand the likelihood that a focus on the fat intake without an appreciation of the effect of carbohydrate intake will not lower all the blood lipids associated with the development of coronary heart disease. (10, p. 83)


Blood lipids and human atherosclerosis

January 1, 1951

Roger Buliard

Carnivore

Inuk

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"Kakertogot taima"..."We are always hungry now."
Of course they were hungry. The Eskimo is a carnivore. His body craves meat--seal, bear, caribou, fish--and the climate and his hard life aren't satisfied by anything else. Half a grapefruit and a couple of pieces of toast are not the breakfast for the Inuk at all, but for another class of people.

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The Eskimo used to hunt only what he needed--bear, seal, caribou.

The little foxes--Tiriganiak--he despised. In the old days the Copper Eskimo hardly recognized the existence of the fox. If he met one on the trail he might risk an arrow on him, just to try his skill, but never because he wanted the animal. Fox meat makes poor eating, and fox fur is too frail for anything but baby clothes.

But fashionable women in Paris and New York did not share the Inuk's contempt for the fox. They regarded Tiriganiak's silvery fur as a perfect complement to their gleaming shoulders. What women want, men will get, and so the white man came to the Arctic after foxes and dinned into the Eskimo's ear the value of fox pelts.

"Do you want a rifle, eh, Inuk? Ammunition? Then go and get us foxes, plenty of foxes. Plenty of foxes."

The Eskimo wanted the white man's rifle, steel knife, fish net, boat. So he went after foxes. And soon he found he was so busy getting the miserable little animals that he had no time left in which to hunt for real meat--for bear and caribou. Observing the white traders, he saw them eating bread and jam, and tea with sugar. The new food was no good. It had no taste, and certainly didn't stay with one on the trail. But the Inuk wanted to imitate the Krabloonak. He ate the white man's sugar, and soon it became a habit. He found that he could not do without it. 

"Sugar!" he says. "The Eyebrows offered it to us for nothing, just to try, and we threw it away. The taste of that sand was so bad. Now we have got to like it, but they no longer give it to us. They sell it, and dearly. Mamianar! Calamity!"

Systematically, the white traders ensared the Eskimos, making them slaves to commodities of which they had felt no need before the Eyebrows came, unnecessary luxuries such as flour, silk, sugar, even chewing gum. All these things the Inuit paid for--by giving up his healthy, free life in exchange for trivial luxuries. He ceased to be a hunter, in many cases, and became a trapper, a slave to the little foxes he despised. Thus Tiriganiak--the smallest of all--revolutionized the Eskimo's life, at least the lives of those Eskimos close enough to the traders' posts to come under their influence.

Not too long ago, all Eskimos hunted to clothe and feed themselves. Now they go after foxes, with which to buy some jam, or a Micky Mouse watch, or a cheap, tinny-sounding phonograph. They haven't time to hunt fo seal to provide oil for their lamps, so they buy the white man's kerosene. More foxes. There is no caribou meat on hand, so he eats the white man's flour. More foxes. Soon he lives in a vicious circle, like a knifegrinder's dog in his wheel cage.

Thus, in those areas where the traders hold sway, the happy hunter of old has become a kind of clerk. Once fierce and independent, ignoring tomorrow and contemptuous of anyone who mentioned it, now he is always in debt, as badly off as a petty office worker caught in the clutches of the race-track bookmaker. Once his life was diversified--today hunting, tomorrow sealing, the next day fishing--whatever satisifed the whim of the moment. Now he must turn all his energies toward the capture of the fox. And the supreme irony, of which he is aware, is in the fact that he, the Agun, the male, must outstrip himself to satisfy the desires of the scorned Arna--the woman. And the Krabloonak's woman, at that.

Along the coast, noawadays, one often hears from the Eskimos a bitter, disillusioned cry. "Kakertogot taima"..."We are always hungry now."

Of course they were hungry. The Eskimo is a carnivore. His body craves meat--seal, bear, caribou, fish--and the climate and his hard life aren't satisfied by anything else. Half a grapefruit and a couple of pieces of toast are not the breakfast for the Inuk at all, but for another class of people.

Yet the Inuk counts on the little foxes to provide his sustenance all the year round, and sometimes the foxes don't turn up. Then he's in trouble. Then there is famine. And it is usually too late before the Inuit resign themselves to going out on the ice after seals, as they should have done early in the winter. They starve. At Coppermine, in 1948, for example the whole Eskimo colony kept alive only by eating old skins, boots, and other rubbish--and this not fifteen miles from a white man's settlement.

You might blame the traders themselves, and it is true that some are mightily unscrupulous, but it is not the individuals who should be blamed, but the system, and the government that encourages it. I am told that such tragedy is not known among the Eskimos in Greenland, under Danish rule, though it matches the colonial pattern elsewhere--in the sugar islands of the Caribbean, for eample, where the natives were persuaded to forego their food crops in order to plant sugar cane, and where starvation results when the sugar crop is poor or when the market drops and the price breaks. 

The Eskimos have never heard of the seven lean kine. A trapper may bag three hundred foxes in one year and three the next, but it never occurs to him to store provisions against a bad season. Of course, we must blame him for his improvidence. But must we not also blame the white men who profit vilely from the Eskimo's ignorance, who take advantage of a good fox season by importing diamond rings, gold watches, silk dresses, chronometers, and similar goods? Of what use is a diamond ring to a woman who's going to wear it for cutting seal blubber, if she's lucky enough to have a seal to cut up? What good is a chronometer, complete with sweep second hand, to a man who doesn't care a whit for time? Of what use is a silk dress under a greasy caribou parka?

With melancholy one must watch a venal civilization displace the old Eskimo style. The white man is as devious as Sila. He takes much, and gives little. He talks big, and the rewards look inviting, but when the season is over he has the foxes and what has Inuk?

An empty belly. A forlorn view of the future. The precious watch will soon be opened to see what makes it tick and ruined by snow or water. The elegant dress will soon because a greasy snot-stained rag. The diamong ring will not be worn long before it is lost down a seals' hole. Alas!

January 2, 1951

Benjamin P. Sandler

Diet Prevents Polio

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Dr Sandler links polio to eating sugar. "Their susceptibility to infection was possibly due to their poor diet with its high sugar and starch content. The human is a carnivore and can thrive on protein and fat alone, if necessary."

The following is a chapter from the book Diet Prevents Polio written by Benjamin P. Sandler, M.D., and published in 1951, at the height of the polio epidemic. Dr. Sandler received his degree in medicine at New York University in 1931. He interned at Morrisania city hospital in the Bronx, New York and later was on the staff there as well as Polyclinic and Montefiore hospitals in New York City. From July, 1941, until February, 1947, he was in the U. S. naval medical corps, attaining the rank of commander. He has done considerable research in polio and the relationship between diet and disease. He has published six papers on the latter subject, as well as papers on other medical subjects including research on glucose and tuberculosis. His research includes a period assisting the research staff at Willard Parker hospital in New York City during the epidemic there in 1931, and independent research later, when he “gave” polio to a rhesus monkey, transmitted it to a rabbit, and then to another monkey. 


Diet Prevents Polio by Benjamin P. Sandler, M.D., and published in 1951 by the Lee Foundation for Nutritional Research, Milwaukee, WI 


Chapter 2: Low Blood Sugar and Susceptibility to Polio 


During my research I observed a large number of patients who had symptoms that were caused by low blood sugar. They complained of the symptoms previously described, namely: 

  • headache

  • dizziness

  • weakness

  • fatigue

  • abdominal pain

  • nervousness

  • palpitation

  • frequent sweats

  • occasional fainting spells 

Most of these patients were malnourished, which, physiologically, meant subnormal liver glycogen storage. Their diet was deficient in protein and consisted largely of the cheaper starchy foods. 


I noted that these patients also had poor resistance to infections such as colds, sore throat, grippe, influenza, bronchitis, and pneumonia. By increasing the protein content of their diet and by reducing the sugar and starch content, they improved considerably. They became stronger, more vigorous and buoyant, and had fewer infections. 


A few of these patients had had polio in childhood. Observations of these patients over a long period of time led me to suspect that their susceptibility to infection was possibly due to their poor diet with its high sugar and starch content.  


Their increased resistance to infection with a better diet confirmed this suspicion. It then occurred to me that their susceptibility to polio could be explained on a similar dietary basis. 


Specifically, I suspected that children and adults contracted polio because of low blood sugar brought on by a diet containing sugar and starch. 


I reasoned that the polio virus was able to cross tissue barriers, reach the brain and spinal cord, invade the nerve cells, damage or destroy them and cause paralysis. And I further reasoned that if the blood sugar never fell below 80 mg polio could never result. I suspected that during a polio epidemic only those children and adults who experienced periods of low blood sugar would contract the disease and that those individuals who were in actual contact with the virus but who maintained normal blood sugar levels would not contract the disease. Thus, it remained to prove that low blood sugar could be a factor in susceptibility to polio. And, after this had been proved, the following questions had to be answered: 

  • What causes low blood sugar in humans?

  • How can low blood sugar be prevented?

The prevention of low blood sugar would thus mean the prevention of polio. Before describing the experiments performed, I should like to make a preliminary summary and state without reserve that: 


  1. 1. Low blood sugar is a factor of susceptibility to polio. 

  2. 2. Low blood sugar occurs frequently in children and adults and is caused chiefly by a dietary error, namely, the consumption of sugar and starch 

  3. 3. Correction of this dietary error will prevent low blood sugar and thus prevent polio. 

An experimental method to prove that low blood sugar was a factor of susceptibility to polio was readily available. In 1938, the only laboratory animal that could contract polio by experimental inoculation was the monkey. All other laboratory animals were completely resistant to the polio virus. The rabbit is one of these resistant animals. Without knowing the blood sugar range in the monkey and rabbit, it was suspected that the blood sugar in the monkey reached lower levels than in the rabbit. These suspicions were found to have a basis in fact through the investigations of Drs. Jungeblut and Resnick of Columbia University who studied blood sugar levels in monkeys, and through the investigations of Drs. du Vigneaud and Karr of Cornell University who studied blood sugar levels in rabbits. In monkeys, blood sugar values as low as 50 mg. were observed, whereas in the rabbit, values below 100 mg. were never observed. In numerous determinations made on rabbits I have never obtained values below 100 mg. It was therefore concluded that the susceptibility of the monkey to the polio virus was due to the fact that its blood sugar fell to subnormal values, and that the resistance of the rabbit might be associated with the fact that its blood sugar never fell below 100 mg, and that at this concentration cellular oxidation of glucose in the nervous system and other organs would be maintained at such a level as to enable the cells to protect themselves against invasion by the virus. Physiologists have stated that the normal blood sugar level of 80 mg. holds true for all mammals. The next step was to lower the blood sugar of the rabbit to subnormal values with insulin injections, and then inoculate the rabbit with polio virus. This was done and it was found that the rabbits became infected and developed the disease. The details of these experiments were published in the American Journal of Pathology, January, 1941. Some rabbits showed signs of infection 8 to 10 hours after inoculation. I wish to stress this short period of incubation in the rabbit because it demonstrates that polio can develop in a short period of time. This is important, as we shall learn later, when we discuss the onset of polio in humans within 24 hours after severe physical exertion. The rabbit is also resistant to the dog distemper virus. One of the largest research laboratories has conducted much research with this virus and when I informed the members of the staff about my success in inoculating rabbits with polio virus after  lowering the blood sugar, they inoculated rabbits with the dog distemper virus after insulin and reported to me that they observed signs of infection in the rabbit for the first time. This corroborating experiment indicates that low blood sugar may cause susceptibility to many infections. I was thus satisfied that low blood sugar was a factor of susceptibility to the polio virus in monkeys, and that rabbits could be rendered susceptible after their blood sugar was lowered with insulin (Insulin, as you probably know, is the hormone which diabetics inject into themselves in order to keep their blood sugar within normal range. It is a quickacting drug and can lower the blood sugar within an hour or so after injection). I concluded that the concept that low blood sugar created susceptibility to polio in both monkeys and rabbits could be applied to humans as well. What Causes Low Blood Sugar in Humans? The next step in the solution of the polio problem was to find out the causes of low blood sugar in humans. Fortunately the answer to this problem was already at hand. It has been found that the consumption of sugar and starch and foods containing these substances were the chief causes of low blood sugar. When patients drank a solution of pure glucose they had a period of low blood sugar which began one to two hours after the glucose was taken and which lasted for one to two hours, and longer. This study of the blood sugar is called the "glucose tolerance test" and is employed for the detection of hypoglycemia or hyperglycemia. When they ate a meal containing sugar and starch they also had periods of low blood sugar which came on an hour or so later and which lasted for from one to two hours. The low blood sugar was more marked and lasted for a longer time after the glucose solution than after a meal containing starch. It is an established fact that this paradoxic depressant effect on the blood sugar level is more readily exerted by sugar than it is by starches. I have observed these results in hundreds of cases and similar results have been obtained by other investigators. It is a surprising paradox: the more sugar (and starch) you eat, the more likely you will develop low blood sugar. Drs. E. P. McCullagh and C. R. K. Johnston have shown how the glucose tolerance test is readily influenced by diet. Thus the second problem: What can cause low blood sugar in the human? was solved. How Can Low Blood Sugar be Prevented? The third problem, "How can low blood sugar be prevented?" was the only one left and this, too, was readily solved. It had been found by other investigators that a meal consisting of protein, fat, and carbohydrates, but with no sugar or starch, NEVER caused low blood sugar. The addition of sugar and starch to such a meal could readily produce low blood sugar. Thus I arrived at a simple formula for preventing polio: eliminate from the diet sugar and foods containing sugar, and reduce the consumption of foods containing starch. Since eating sugar and starch during a meal may cause low blood sugar after one to three hours, and since elimination of sugar and starch prevents low blood sugar, the invasion of the body by the polio virus will be prevented by a diet containing no sugar and no starch. Protection against polio would thus begin on the very day such a diet was started and protection would last just as long as such a diet was adhered to. I have found that a diet completely free of sugar and starch and consisting of proteins, fats, and non-starchy vegetables: May be adhered to for years with beneficial effect and absolutely NO harmful effect. There is NO supporting evidence to indicate that sugar and starch are necessary for health or for energy purposes.


 The human is a carnivore and can thrive on protein and fat alone, if necessary. The Eskimos thrive well on meat and fish which yield only protein and fat, and polio is unheard of among them.  American and European explorers in the Arctic regions have lived on meat and fish for as long as 18 months and have maintained perfect health all the time on such a diet. Vilhjalmur Stefansson, the Arctic explorer, has described his existence on such a diet in great detail. He states that he was in perfect health on such a diet which consisted of protein and fat alone. 


Eskimos who live on meat and fish are not susceptible to infectious diseases. They do become susceptible when they live amongst white men and eat the white man’s diet with its sugar and starch. It is true that the Eskimo’s fresh contact with the white man exposes him to infectious diseases to which he (the Eskimo) has not had the opportunity to become immune. The presence of sugar and starch in the Eskimo's new diet is of greater significance. A US public health officer stationed in Alaska has blamed this dietary factor for the great susceptibility of the Eskimo to tuberculosis. A low carbohydrate meal elevates and stabilizes the blood sugar levels. This stabilizing effect is important because some of the symptoms of low blood sugar are due to rapid fall in blood sugar level which accompany wide fluctuations in blood sugar levels following the ingestion of sugar and starch.

Ancient History

8000

B.C.E.

Evolutionary and Population Genomics of the Cavity Causing Bacteria Streptococcus mutans

S. Mutans, the bacteria involved in creating cavities likely evolved and expanded with the population growth 10,000 years ago as humans started relying more on starches and sugars.

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Streptococcus mutans is widely recognized as one of the key etiological agents of human dental caries. Despite its role in this important disease, our present knowledge of gene content variability across the species and its relationship to adaptation is minimal. Estimates of its demographic history are not available. In this study, we generated genome sequences of 57 S. mutans isolates, as well as representative strains of the most closely related species to S. mutans (S. ratti, S. macaccae, and S. criceti), to identify the overall structure and potential adaptive features of the dispensable and core components of the genome. We also performed population genetic analyses on the core genome of the species aimed at understanding the demographic history, and impact of selection shaping its genetic variation. The maximum gene content divergence among strains was approximately 23%, with the majority of strains diverging by 5–15%. The core genome consisted of 1,490 genes and the pan-genome approximately 3,296. Maximum likelihood analysis of the synonymous site frequency spectrum (SFS) suggested that the S. mutans population started expanding exponentially approximately 10,000 years ago (95% confidence interval [CI]: 3,268–14,344 years ago), coincidental with the onset of human agriculture. Analysis of the replacement SFS indicated that a majority of these substitutions are under strong negative selection, and the remainder evolved neutrally. A set of 14 genes was identified as being under positive selection, most of which were involved in either sugar metabolism or acid tolerance. Analysis of the core genome suggested that among 73 genes present in all isolates of S. mutans but absent in other species of the mutans taxonomic group, the majority can be associated with metabolic processes that could have contributed to the successful adaptation of S. mutans to its new niche, the human mouth, and with the dietary changes that accompanied the origin of agriculture.


Undoubtedly, one of the major challenges that S. mutans had to overcome as the carbohydrate content of the human diet increased was surviving at low pH. Although S. mutans does not constitute a significant proportion of the oral flora colonizing healthy dentition, it can become numerically significant when there is repeated and sustained acidification of the biofilms associated with excess dietary carbohydrates or impaired salivary function (Burne 1998).

Luxor, Luxor Governorate, Egypt

2475

B.C.E.

The Earliest Record of Sudden Death Possibly Due to Atherosclerotic Coronary Occlusion
WALTER L. BRUETSCH

The sudden death of an Egyptian noble man is portrayed in the relief of a tomb from the Sixth Dynasty (2625-2475 B.C.). Since there is indisputable evidence from the dissections of Egyptian mummies that atherosclerosis was prevalent in ancient Egypt, it was conjectured that the sudden death might have been due to atherosclerotic occlusion of the coronary arteries.

It may be presumptuous to assume that an Egyptian relief sculpture from the tomb of a noble of the Sixth Dynasty (2625-2475 B.C.) may suggest sudden death possibly due

to coronary atherosclerosis and occlusion. Much of the daily life of the ancient Egyptians has been disclosed to us through well-preserved tomb reliefs. In the same tomb that contains the scene of the dying noble, there is the more widely known relief "Netting Wildfowl in the Marshes." The latter sculpture reveals some of the devices used four thousand years ago for catching waterbirds alive. It gives a minute account of this occupation, which in ancient Egypt was both a sport and a means of livelihood for the professional hunter.

The relief (fig. 1), entitled "Sudden Death," by the Egyptologist von Bissing2 represents a nobleman collapsing in the presence of his servants. The revelant part of the explanatory text, as given by von Bissing, follows (translation by the author):


The interpretation of the details of the theme is left to the observer. We must attempt to comprehend the intentions of the ancient artist who sculptured this unusual scene. In the upper half (to the right) are two men with the customary brief apron, short hair covering the ears, busying themselves with a third man, who obviously has collapsed. One of them, bending over him, has grasped with both hands the left arm of the fallen man; the other servant, bent in his left knee, tries to uphold him by elevating the head and neck, using the knee as a support. Alas, all is in vain. The movement of the left hand of this figure, beat- ing against the forehead, seems to express the despair; and also in the tightly shut lips one can possibly recognize a distressed expression. The body of the fallen noble is limp. . . . Despite great restraint in the interpretation, the impression which the artist tried to convey is quite obvious. The grief and despair are also expressed by the figures to the left. The first has put his left hand to his forehead. (This gesture represents the Egyptian way of expressing sorrow.) At the same time he grasps with the other arm his companion who covers his face with both hands. The third, more impulsively, unites both hands over his head. ... The lord of the tomb, Sesi, whom we can identify here, has suddenly collapsed, causing consternation among his household.

In the section below (to the left) is shown the wife who, struck by terror, has fainted and sunk totheflor. Two women attendants are seen giving her first aid. To the right, one observes the wife, holding on to two distressed servants, leaving the scene. . . .

von Bissing mentions that the artist of the relief must have been a keen observer of real life. This ancient Egyptian scene is not unlike the tragedy that one encounters in present days, when someone drops dead of a "heart attack." The physician of today has almost no other choice than to certify the cause of such a death as due to coronary occlusion or thrombosis, unless the patient was known tohave been aflictedwith rheumatic heart disease or with any of the other more rare conditions which may result in sudden death.


Atherosclerosis among the Ancient Egyptians 


The most frequent disease of the coronary arteries, causing sudden death, is atherosclerosis. What evidence is available that atherosclerosis was prevalent in ancient Egypt?

The first occasion to study his condition in peoples of ancient civilizations presented itself when the mummified body of Menephtah (approx.1280-1211B.C.), the reported "Pharaoh of the Hebrew Exodus" from Egypt was found. King Menephtah had severe atherosclerosis. The mummy was unwrapped by the archaeologist Dr. G. Elliot Smith, who sent a piece of the Pharaoh's aorta to Dr. S. G. Shattock of London (1908). Dr. Shattock was able to prepare satisfactory microscopic sections which revealed advanced aortic atherosclerosis with extensive depositions of calcium phosphate.

This marked the beginning of the important study of arteriosclerosis in Egyptian mummies by Sir Mare Armand Ruffer, of the Cairo Medical School(1910-11). His material included mummies ranging over a period of about 2,000 years (1580 B.C. - 525 A.D.).

The technic of embalming in the days of ancient Egypt consisted of the removal of all the viscera and of most of the muscles, destroying much of the arterial system. Often, however, a part or at times the whole aorta or one of the large peripheral arteries was left behind. The peroneal artery, owing to its deep situation, frequently escaped the em- balmer'sknife. Otherarteries,suchasthe femorals, brachials, and common carotids, had persisted.

In some mummies examined by Ruffer the abdominal aorta was calcified in its entirety, the extreme calcification extending into the iliae arteries. Calcified plaques were also found in some of the larger branches of the aorta. The common carotid arteries frequently revealed patches of atheroma, but the most marked atheroselerotic alterations were in the arteries of the lower extremities. The common iliae arteries were not infrequently studded with calcareous plaques and in some instances the femoral arteries were converted into rigid tubes. In other mummies, however, the same arteries were near normal.


What is known as Mdnekeberg's medial calcification was also observed in some of the mummified bodies. In a histologic section of a peronieal artery, the muscular coat had been changed almost wholly by calcification. In one of Ruffer's photographic plates, a part of a calcified ulnar artery is shown. The muscular fibers had been completely replaced by calcification.


In the aorta, as in present days, the atherosclerotic process had a predilection for the points of origin of the intercostal and other arteries. The characteristics and the localization of the arterial lesions observed in Egyptian mummies leaves litle doubt that atherosclerosis in ancient times was of the same nature and degree as seen in today's postmortem examinations.


As to the prevalence of the disease, Ruffer ventured to say that the Egyptians of ancient times suffered as much as modern man from arterial lesions, identical with those found in our times. Ruffer was well qualified to make this statement having performed many autopsies on modern Egyptians, Moslems, and other people of the Middle East. In going over his material and examining the accompanying photographic plates of arteries, one can have litle doubt that what Ruffer had observed in Egyptian mummies represented arteriosclerosis as it is known today.


Although the embalming left no opportunity to examine the coronary arteries inl mummified bodies, the condition of the aorta is a good index of the decree of atheroselerosis present elsewhere. In individuals with extensive atheroselerosis of the aorta, there is almost always a considerable degree of atherosclerosis in the coronary arteries. If Ruffer's statement is correct that the Egyptians of 3,000 years ago were afflicted with arteriosclerosis as much as we are nowadays, coronary occlusion must have been common among the elderly population of the pre-Christian civilizations.


Furthermore, gangrene of the lower extremities in the aged has been recognized since the earliest records of disease. Gangrene of the extremities for centuries did not undergo critical investigation until Cruveilhier (1791- 1873) showed that it was caused by atherosclerotic arteries, associated at times with a terminal thrombus.


SUMMARY

The record of a sudden death occurring in an Egyptian noble of the Sixth Dynasty (2625-2475 B.C.) is presented. Because of the prevalence of arteriosclerosis in ancient Egyptian mummies there is presumptive evidence that this incident might represent sudden death due to atheroselerotic occlusion of the coronary arteries.

Cairo, Cairo Governorate, Egypt

1580

B.C.E.

ON ARTERIAL LESIONS FOUND IN EGYPTIAN MUMMIES

Arteries of Egyptian mummies from 1580 B.C.E. to 525 A.D. have extensive calcification of the arteries, the same nature as we see today, and unlikely to be due to a very heavy meat diet, which was always a luxury in ancient Egypt. Instead, the diet was mostly a course vegetarian one.

DISCUSSION OF RESULTS.

Nature of the lesions. There can be no doubt respecting the calcification of the arteries, and that it is of exactly of the game nature as we see at the present day, namely, calcification following on atheroma.

The small patches seen in the arteries are atheromatous, and though the vessels have without doubt been altered by the three thousand years or so which have elapsed since death, nevertheless the lesions are still recognisable by their position and microscopical structure.

The earliest signs of the disease are always seen in or close below the fenestrated membrane,-that is, just in the position where early lesions are seen at the present time. The disease is characteiised by a marked degeneration of the muscular coat and of the endothelium. These diseased patches, discrete at first, fuse together later, and finally form comparatively large areas of degenerated tissue, which may reach the surface and open out into the lumen of the tube. I need not point out how completely this description agrees with that of the same disease as seen at the present time.

I have already mentioned the absence of leucocytes and cellular infiltration, and need not therefore return to it here.

In my opinion, therefore, the old Egyptians suffered as much as we do now from arterial lesions identical with those found in the present time. Moreover, when we consider that few of the arteries examined were quite healthy, it would appear that such lesions were as frequent three thousand years ago as they are to-day.


I do not think we can accuse a very heavy meat diet. Meat is and always has been something of a luxury in Egypt, and although on the tables of offerings of old Egyptians haunches of beef, geese, and ducks are prominent, the vegetable offerings are always present in greater number. The diet then as now was mostly a vegetable one, and often very coarse, as is shown by the worn appearance of the crown of the teeth.


Nevertheless I cannot exclude a high meat diet as a cause with certainty, as the mummies examined were mostly those of priests and priestesses of Deir el-Bahari, who, owing to their high position, undoubtedly lived well. I must add, however, that I have seen advanced arterial disease in young modern Egyptians who ate meat very occasionally. In fact, my experience in Egypt and in the East has not strengthened the theory that meat-eating is a cause of arterial disease.

Finally, strenuous muscular exercise can also be excluded as a cause, aa there is no evidence that ancient Egyptians were greatly addicted to athletic sport, although we know that they liked watching professional acrobats and dancers. I n the ca6e of the priests of Deir el-Bahari, it is very improbable, indeed, that they were in the habit of doing very hard manual work or of taking much muscular exercise.

I cannot therefore at present give any reason why arterial disease should have been so prevalent in ancient Egypt. I think, however, that it is interesting to find that it was common, and that three thousand years ago it represented the same anatomical characters as it does now.


FIG. 1.-Pelvic and arteries of thigh completely calcified (XVIlIth-XXth Dynasty).
Fro. 2.-Completely dcifiedprofundaarteryaftersoakinginglycerine(XXIstDynasty). FIQ. 8.-Partly calcified aorta
(XXVIIth Dynasty).
Fro. 4.-Calcified patches in aorta (XXVIIth Dynasty).
Fio. 5.-Calcified atheromatous ulcer of subclavian artery (XVIIIth-XXth Dynasty). Fro. &-Patch of atheroma
i n anterior tibia1 artery (glycerine). The centre of the patch

is calcified (XXIst Dynasty).
FIG. 7.-Atheroma of brachial artery (glycerin) (XXIst Dynasty).
Fro. &-Unopened ulnar artery, atheromatous patch shining through (glycehne) (XXIst Dynasty). 31

FIG. 9.-Section through almost completely calcified posterior peroneal artery (low power). Van Gieson staining. a,al, n2, Remnants of endothelium and

fenestrated membrane. b, Calcified patches.

Many more are seen.
Same stain. (Leitz, Oc. 1, x &.)

FIG. 10.-Section


FIG. 11.-Section m(Leitz, Oc. 1, x *.)

a,Remains of endothelium.
b, Fenestrated membrane.
c, Muscular coat.
d,f,Membrane coat undergoing degenerntion.
e, Completely degenerated remnants of muscular coat.

atheroniatous patch of n h a r artery. Same stain. (Leitz, (Reference letters the same as in Fig. 11.)


FIG. 12.-Section Oc. 1, x fa.)

through calcified patch of ulnar artery. a,d, Calcified patches.
b, Partially calcified m wular coat. c, Annular muscular fibre.

 through atheromatous patch of anterior tibia1 artery. Same stain through
FIG. 13.-Section at edge of atheromatous patch. Hreniatoxylin stain (Leitz, Oc. 1, XTh.1 a,Leucocytes (1). The atheromatous part on the left stains intensely dark with hamatoxylin.

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