This section is from the "Health and Survival in the 21st Century" book, by Ross Horne.
The main sources of protein and fat in the Western diet are of animal origin and thus contain cholesterol in quantities harmful to the human body. However, many pure vegetarians also suffer toxemia to a dangerous extent because their diet is based heavily on grain products and lentils, which are very high in vegetable protein, and in many cases include liberal quantities of concentrated vegetable oils.
The by-products of the metabolism of fat and protein which are potentially harmful are chemicals called ketones from fat, and uric acid and ammonia from protein. It is mainly these substances in excessive amounts which overtax the kidneys, sometimes to the extent of destroying them. For this reason it is wise for people on the traditional Western diet to drink copious quantities of water to flush out the kidneys. Not only do heavy protein-eaters need to urinate often, their urine is dark in color and odorous. Observers of primitive Eskimos in the early 1900s described how in winter the Eskimos had to go out into the freezing cold at frequent intervals to urinate and how they would return inside bringing snow to make more drinking water.
Apart from the toxins so produced, the condition of the bloodstream can be seriously degraded by particles of fat and cholesterol entering the bloodstream directly from the intestine via the lymph circulation, so much so at times that the blood appears milky red instead of crimson. In this situation the blood's red cells stick together in bunches called rouleaux, which block the fine capillary vessels and deprive the tissues of circulation, causing the tingling sensation of "pins and needles". At the same time the blood platelets also adhere to each other and the blood plasma itself becomes sticky, so up goes the blood pressure as the heart works harder. The white cells of the immune system become inhibited in function as well, and the entire scene becomes a set-up for disaster, disaster meaning every disease in the book. No wonder people lack vitality, need a lot of sleep, catch colds and get headaches, but these are only minor signs of the troubles that lie ahead if the toxemia is allowed to persist.
The most poisonous form of toxemia, however, originates in the colon (large bowel) because of constipation, which on the Western diet is unavoidable due to a lack of dietary fiber. It must be understood that a person can be "as regular as clockwork" and still be constipated. On a natural diet of mainly fruit and vegetables (raw), low in protein and fat, the indigestible cellulose remnants are quickly processed for elimination on reaching the colon by the normal aerobic bacteria there and are then readily defecated, having made the entire transit of the digestive tract in about twenty-four hours. However, when the undigested remnants of a high-fat, high-protein diet arrive in the colon they are difficult to break down further, and the normal aerobic bacteria must change in form to an anaerobic form which putrefies the remnants and produces different acids and toxic chemicals. Because meat, chicken, fish, dairy products and refined carbohydrates are completely lacking in fiber, the process is slow moving. Thus the "transit time" of the Western diet is about seventy-two hours instead of twenty-four, giving the potent toxins ample time to be absorbed into the body by way of the bile circulation and to set up the irritation which leads to appendicitis and bowel cancer.
A graphic illustration of how auto-intoxication from the colon causes all manner of disease is the experience of Sir William Arbuthnot Lane,* the famous English physician and surgeon. Sir William first realized that the bowel was the source of many health problems when, after surgically removing diseased bowels, he noted that his patients' health rapidly improved and various diseases such as arthritis, gall bladder "involvements", thyroid "difficulties", etc disappeared in a few days. At first his surgical training influenced him to specialize in removing peoples' colons, until it occurred to him from the biologist, Sir Arthur Keith's, studies of wild apes that the entire problem could be eliminated simply by dietary means.
*The Prevention of The Diseases Peculiar to Civilization by Sir William Arbuthnot Lane (1929).
That the problem of chemicals such as preservatives, coloring agents, etc: in food is one of relatively minor importance compared to body-produced toxemia is illustrated in some interesting comparisons of disease incidence in different countries. Denmark has very strict prohibition against most food additives, while Norway and Sweden do not. Despite this, Denmark has a cancer incidence twenty per cent higher than Norway and Sweden,* which is explainable by the fact that Denmark per capita consumes twenty per cent more fat in the diet. But another comparison, this time between Denmark and Finland, showed that in relation to colon cancer, meat was a greater danger than fat, because the Finns consumed even more fat than the Danes but had only a quarter as much colon cancer. That Denmark suffers four times the bowel cancer rate of Finland is explainable only by the Danes' much heavier meat consumption (from the International Agency for Research on Cancer 1977).
*Cancer Research, Vol. 35, p. 3379, K. Carroll.