I wish to echo Angelnstix's sentiments in thanking you for sharing your experiences and opinions. I have a great deal of respect for anyone who first, chooses to devote their life to caring for others and, secondly, can successfully complete years and years of medical school.
As for the negative aspects of vegetarianism and veganism, there are several. As one who was a vegetarian for the first 31 years of life and a vegan ever since, I can tell you that you're labeled and teased. Restaraunts are a difficulty as many don't serve any dishes without meat, poultry or fish. That, of course, affects the ability to socialize over a meal. But all of the problems associated with such diets are social rather than health related.
King Element said:
I've seen several references to meat being necessarily bad for the GI tract as well as vegetable matter being necessarily good for it. That's a labeled approach and I tend to take that sort of commentary with a grain of salt. Most gastroenterologists will readily agree that while meat does, in fact, have a longer GI transit time than vegetable matter, the recurrent problems seen with patients who have GI motility problems tend to be associated with consumption of nuts, seeds and popcorn--which have a very high propensity for creating or aggravating bowel blockages. Now that's not to say that nuts, seeds and popcorn are hazardous to your health, but in moderation I think they have their place in a healthy diet.
Though I certainly respect your privacy and the confidentiality of your profession, would it be possible to give some basic numbers? Just a rough representation of how many patients you've seen suffering lower GI distress and a ballpark percentage of how many of those are suffering bowel blockages due to nuts, seeds and other plant matter?
The whole reason we see an abundance of available fiber supplements is to make up for the fact that most people consume too little fiber to promote healthy colons. Within the sacculated interior of the human bowel, fiber helps to keep things moving. Since meat contains zero fiber and almost all plant matter contains at least some, the idea that nuts and seeds are creating these problems seems contrary to the whole purpose of fiber and roughage. Is it more a matter of poorly chewed foods which are relatively hard or quite fiberous and therefore attempt to pass in large pieces? Or perhaps the consumption of materials which cannot be digested and shouldn't be consumed such as the shell of sunflower and pumpkin seeds? These would be the only scenarios I would think likely to cause such obstructions.
In the 1970s the
Journal of the National Cancer Institute was among the first to begin to report what was then seen as startling news. Researchers were finding that incidence of colon cancer were highest in precisely those regions where meat consumption was high. Conversely, colon cancer rates were lowest where meat consumption was low.
Wynder, E., "Dietary Fat and Colon Cancer," Journal of the National Cancer Institute, 54:7, 1975
Berg, J., "Can Nutrition Explain the Pattern of International . . . Cancers?" Cancer Research, 35:3345, 1975
Wynder, E., "The Dietary Environment and Cancer," Journal of the American Dieticians Association, 71:385, 1977
Weisburger, J., "Nutrition and CancerOn the Mechanisms Bearing on Causes of Cancer of the Colon, Breast, Prostate, and Stomach," Bulletin of the New York Academy of Medicine, 56:673, 1980
Reddy, B., and Wynder, E., "Large Bowel Carcinogenisis: Fecal Constituents of Populations with Diverse Incidence of Colon Cancer," Journal of the National Cancer Institute, 50:1437, 1973
Hill, M., "Colon Cancer: A Disease of Fiber Depletion or of Dietary Excess," Digestion, 11:289, 1974
Hardinge, M., "Nutritional Studies of Vegetarians: III. Dietary Levels of Fiber," American Journal of Clinical Nutrition, 6:523, 1958
King Element said:
As to the notion that meat stays for a necessarily longer time in the digestive tract, again, it depends on what you're referring to by comparison. All in all, meat takes longer to digest based on it's digestion profile, but I have not seen cases where meat putrefaction in the bowels has created problems except in cases where people who have undertaken long-term "meat only" diets.
Is that to say that it's not unhealthy to have meat rotting in the digestive tract?
King Element said:
These patients have been shown to have a greater likelihood for GI distress, impaction and blockages by comparison than strict vegetarians. But these are both the extremes of the spectrum and do not represent the vast majority of the population in this country.
So we do see an increase of bowel obstructions on pure meat diets. We also know that fiber is assistive to moving digestive matter through the digestive system and we know that meat contains no fiber. Much literature exists which suggests that vegetarians are more regular, suffering far less from constipation and that they suffer proportionately fewer cases of colon cancer.
Dr. John Berg, of the
National Cancer Institute, headed research to determine if genetic factors might explain why the Japanese displayed lower rates of colon cancer, rather than the fact that, per capita, they consumed less meat.
In conducting the study, Japanese immigrants who adopted an American diet were found to display cancer rates which equalled that of Americans. Of course, this doesn't let fast food off the hook and may help to implicate it further.
Journal of the American Cancer Institute, Dec. 1973, pg 1771
King Element said:
I certainly take issue with the widespread use of recombinant Bovine Growth Hormone in the beef industry as well as the deplorable conditions associated with poultry. I'm not particularly keen on high amounts of dairy consumption either, although probably for different reasons.
I find it hard to imagine how anyone could not object to such practices. In addition to growth hormones there are antibiotics, relatively high concentrations of pesticide residues, chloramphenicol and a host of other drugs/chemicals in common use, some of which have been banned in other countries.
King Element said:
It's also my opinion that a diet high in fat complicates the issue and aggravates any predisposition to health problems, including those of dietary origin. However, I am not of the opinion that consumption of meat should be labeled as responsible for all of the cardiovascular problems found in the civilized societies.
Certainly not all cardiovascular disease is directly attributable to the consumption of animal-based foods. But based on the research and the evidence it seems likely to be directly tied to the majority of cases.
A vast and still growing body of evidence strongly indicates that diets high in saturated fat and cholesterol raise the level of cholesterol in the blood and produce atherosclerosis, which leads to cardiovascular disease. The number of studies which confirm these findings is staggering.
Gordon, T, "Premature Mortality from Coronary Heart Disease: The Framingham Study," Journal of the American Medical Association, 215:1617, 1971
Kannel, W., "Incidence and Prognosis of Unrecognized Myocardial InfarctionAn Update on the Framingham Study," New England Journal of Medicine, 311:1144, 1984
Ellis, F, "Angina and Vegan Diet," American Heart Journal, 93:803, 1977
Editorial: "Trials of Coronary Heart Disease Prevention," Lancet, 2:803, 1982
Zampogna, A., "Relationship Between Lipids and Occlusive Coronary Artery Disease," Archives of Internal Medicine, 140:1067, 1980
Kannel, W., "Cholesterol in the Prediction of Atherosclerotic Disease: New Perspectives Based on the Framingham Study," Annals of Internal Medicine, 90:85, 1979
Page, I., "Prediction of Coronary Heart Disease Based on Clinical Suspicion, Age, Total Cholesterol, and Triglyceride," Circulation, 42:625, 1970
Kannel, W., "Cholesterol in the Prediction of Atherosclerotic Disease: New Perspectives Based on the Framingham Study," Annals of Internal Medicine, 90:85, 1979
Shekelle, R., "Diet, Serum Cholesterol and Death From Coronary Heart Disease," New England Journal of Medicine, 304:65, 1981
King Element said:
Exercise, or lack thereof--which seems to be increasingly worse through the decades--is a major contributor that I have not seen sufficiently mentioned in this topic.
Certainly there is no argument there. Exercise is always a part of being healthy no matter what one chooses to eat. Without exercise no diet can possibly succeed in producing optimum health.
King Element said:
I think it's jumping the gun to conclude that meat consumption for them is the causative factor when there are so many other variables to consider.
Certainly in every case there is more than one factor. But based on what we know and have known about saturated fats and cholesterol in cardiovascular disease, they must be considered major contributing factors.
King Element said:
It would also stand to reason that people who consume a significant amount of fast food are neither likely to not be vegetarian, nor are they likely to be actively involved in regular and appropriate cardiovascular exercise.
This is true, but what are the primary characteristics of fast food which cause health problems? Saturated fats, sugar, cholesterol, highly processed carbohydrates. Two of those four are attributable primarily to animal products.
King Element said:
Many of you will note that I have been a proponent of low carbohydrate diets for several years now from purely a weight loss standpoint. However, one of the greatest injustices is when I hear of someone saying they are eating a low carb diet consisting of meat almost exclusively. That's not a low carb diet, that's an almost meat-only diet and shouldn't be construed as anything else. Even Atkins himself did not advocate meat only for anything more than short periods of time. If people would pay particular attention to his dietary guidelines in the various stages of his plan, it would be clear and evident that only the vegetable matter highest in sugar content is recommended to be avoided once a specific weight loss goal had been obtained. With that being said, there are patients to whom I would not recommend the Atkins diet in it's entirity, just as there are also patients whom I do not feel could tolerate rapid transition to an all vegetable diet without restriction. We are all different physically and we all have different needs; just as the recommended daily allowance for vitamins and minerals are different for individuals for a variety of reasons, their macronutrient ratios will also be different and varied. So I would hardly suggest one diet fits all approach and would caution against anyone else doing it.
Though nutritive requirements do vary from person to person, we are all of the same species. It would be inappropriate to insinuate that because the nutritive requirements of large cats varies from animal to animal that some will do fine eating leaves and grass. They're carnivores and as such remain healthiest on a carnivorous diet. A rabbit will fare no better eating only meat. The nutritive requirements for humans is likely no more diverse than for any other species. As you've pointed out, people who eat a pure meat diet run a greater risk of suffering health problems related to such a diet. Indeed any animal, which attempts to eat a diet substantially different than what anatomy shows to be natural for that particular species, is more likely to suffer related health issues than one which eats a natural diet. By "natural", I refer to the diet suggested by the anatomy of a given species. At this juncture it's worth pondering that statistically, vegetarians and vegans suffer fewer health problems than those consuming an omnivorous diet.