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In response to the 'Blood Type Theory', Michael Klaper M.D states, "Repeatedly packing the colon full of meat residue from a high protein diet has been shown to be highly correlated with cancer of the colon - among the leading killers of industrial nations. In fact, animal protein seems to be "high octane fuel" for the growth of many kinds of cancers.


"In today's world, is eating meat, in any form, safe?" It appears that to base one's diet around animal foods is becoming a high-risk activity, similar to unsafe sex or driving without wearing a seat belt.

Michael Klaper, M.D.



Frequently asked questions about vegetarianism and health.


  • Does vegetarianism guarantee good health? No, like everyone else, vegetarians can get sick and acquire illnesses and diseases but a plant based diet increases your chances of maintaining good health and is now being recognised within the medical profession as being helpful in minimising the chances of developing certain diseases.

  • What about the theory that some blood types are suited to being vegetarian and some blood types are not? There are people of all blood types who are vegetarian and vegan. The fact remains, the human body's digestive system is very long (no matter what the blood type) and therefore not well equipped to digest flesh, unlike carnivorous animals such as cats who are able to digest flesh very efficiently because they have short digestive systems.

    In response to the 'Blood Type Theory', Michael Klaper M.D states, I fear that the apparent improvement experienced by many people who use the "zone" rationale to become big-time carnivores will ultimately be at the cost of damaged vital organs and more lethal and degenerative diseases." and "Given these ever-increasing risks connected to meat consumption, I fear that the theories and books that attempt to justify and promote the eating of flesh - for whatever reason - could be opening the floodgates of ghastly epidemics five or ten years from now. These plagues likely will have a magnitude that will dwarf everybody's concerns about "being in the zone" or eating "right for your type." Click here for a medical opinion about the blood type theory: Blood Types and Diet

  • There seems to be contradicting theories about soy. Is it healthy or unhealthy? Soy

    Will I become anaemic if I go vegetarian suddenly? There are some people who can make an overnight transition with no problems at all while others need to make a bit of an effort with their choice of food while their body adapts. Make sure it is the right decision for you if you are thinking of eliminating animal food overnight and keep in mind that it's the long term that's important. For some people it's fine but some are more successful with a gradual elimination of animal food. Dr Michael Klaper states, "It may be that some "omnivore-from-birth" people who desire to sustain themselves on a vegan diet may have to make a more graded transition to completely plant-based foods, sometimes over several weeks or months, to give the body time to "gear up" its metabolic machinery. In other words, what appears to be a "natural need for meat" may really be the need for an attenuated weaning process from animal products in order to overcome metabolic patterns begun early in life, created largely by cultural practices." For more information on this subject from a medical point of view: click here You may find that replacing animal foods with 'mock meats' and tofu is especially helpful if you are making a sudden transition as these vegetarian meats give you that full feeling and are high in protein and iron - which your body is used to. It is not essential for vegetarians to eat this type of food but many find it very tasty and it can be especially helpful for people making a sudden change to a vegetarian or vegan diet.

    Vitamin C is also needed to absorb iron so have orange juice with baked beans and mushrooms on toast for breakfast or make sure you have food with vitamin C as well as iron. Those people going vegetarian gradually and are eating a good variety of whole foods should not have any problems. For vegetarians eating a healthy diet, iron deficiency (or any other deficiency) is not going to be any more likely than for meat eaters. Some people say that vegans (those who don't eat meat eggs or dairy) can be prone to vitamin b12 deficiency but most vegans do not have this problem. If it is of concern, a simple blood test will let you know whether a vitamin b12 supplement is required. If you are going from a meat eating diet to a strict vegan diet suddenly, a yearly blood test might be a good idea just to make sure you are eating properly.

  • If my teenage daughter wants to be vegetarian or vegan does it mean she has an eating disorder? Absolutely not. Unless your daughter shows signs of an eating disorder such as obsession about her weight and is decreasing the amount of food she eats, do not be concerned. As a healthy vegetarian, she should not be eating any less food than she was as a meat eater although it's possible she may want to eat more frequently and smaller servings - this is normal and healthy, as fruit, vegetables and grains are digested much faster than meat. As long as she is eating the same amount of food each day as she was as a meat eater, there is no problem. Eliminating animal foods from her diet should not make much difference to her weight unless she was eating a lot of meat in the form of take away chicken and hamburgers in which case she might loose a little. As a vegetarian, if she eats a good balance of healthy food, she should only become healthier. To support her, read the relevant pages on this site such as, Health, Fitness, Veg Food Basics and Teenage Vegetarian.

  • Am I going to suddenly feel fantastic when I become vegetarian? This will vary from person to person. Some will feel much better very quickly while some people may need some time to adjust before they notice the benefits and it will also depend on how well you eat.

  • Can a vegetarian diet heal any diseases? Probably vegetarianism on its own, for most people would not be enough to cure a serious disease although specific illnesses do respond well. Eliminating or even reducing meat and dairy, in most cases, will lower cholesterol and reduce the risk of heart attack and stroke, therefore improving the quality of life and possibly prolonging the life of someone with heart disease. American Physicians such as Dr. Dean Ornish and Dr. Caldwell Esselstyn have actually stopped and even reversed heart disease in patients by putting them on plant-based diets. Although some cancers are related to lifestyle and diet, (in some cases, cancer of the colon or stomach can be linked to a diet high in animal food) a plant based diet is best used as a preventative. Although eliminating animal food is a healthy choice for someone with cancer, eliminating animal food is unlikely, on its own, to provide a miraculous cure once the cancer is there. Eating a healthy diet whilst also pursuing the appropriate treatments gives the body the greatest chance of healing Usually people who have been miraculously cured of terminal diseases have used a combination of some of the following: a vegetarian diet, vegan diet, raw food diet, macrobiotic diet, visualisation, meditation, prayer, exercise, change of lifestyle, reading and education about the subject of healing, alternative healing and/or orthodox treatment, effective medications, strong relationships with exceptional doctors or other health practitioners, support groups, psychotherapy, spiritual healings, retreats and other techniques. A plant based diet may reduce the risks of developing many health problems and serious diseases in the first place.

  • Which illnesses or diseases respond well to a plant based diet? Reducing or eliminating not only meat but also just as importantly, dairy, may have a positive impact on health issues relating to high cholesterol, some cases of arthritis, type 2 diabetes, heart disease and obesity. Some people who eliminate dairy as well as meat also notice a decrease in sicknesses relating to the lungs and upper respiratory tract and report catching far less colds and flu, and can be less prone to lung and throat infections, bronchitis, pneumonia etc than they were when consuming dairy.


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