22 Jun

Does the Eat Right for your Blood Type Diet Really Work?

 

I am often asked what I think of the Blood Type Diet. It seems to help so many people yet others find it very frustrating to follow and limiting.

The short answer: I don't think there is 4 diets on the planet, I think there are 7 billion diets for 7 billion people and we have to eat to our specific needs.

 

I have tried to follow the type A blood diet as an experiment and had disastrous results. I am allergic to most grains, soy, and peanuts yet D'adamo suggests that all Blood Type A's are best as vegetarian. What am I supposed to eat? Without enough protein that I tolerate well, I fear that I would have muscle wasting, digestive problems and hormone imbalance. Even though there is mention that this diet helps us follow our ancestors diet, I am not supposed to eat one of the most healthy Russian foods- Cabbage.

 

A Critical Examination Of Blood Type Diets - by Loren Cordain, Ph.D., Professor

 

The History And Characterization Of Blood Type Diets


Blood type diets were first popularized by Peter D’Adamo, a naturopathic physician, in his best selling 1996 book, Eat Right 4 Your Type1. The inspiration for Dr. D’Adamo’s book came from subjective clinical impressions of his father, James D’Adamo; also a naturopathic physician who first proposed this concept in his book, One Man’s Food is Someone Else’s Poison 16 years earlier in 19802. As a member of Bastyr College’s first graduating class of naturopathic physicians in 1982, Peter became interested in attempting to validate his father’s subjective and personal observations from reviews of the scientific and medical literature – thus the fundamental reason for Peter writing his hugely successful diet book.

 

The underlying premise for Peter’s dietary ideas is that ABO blood type is the most important issue in determining healthful diets. He advocates separate diets for people with one of the four most common blood types (A, B, O or AB), and has further subdivided his dietary recommendations into three arbitrary ancestral categories: "African, Caucasian and Asian." Hence 12 subgroups (4 blood types x 3 ancestral categories) exist – each with differing dietary recommendations. Each blood type diet includes 16 food groups which are divided into three categories:

 

  1. Highly beneficial
  2. Neutral
  3. Avoid

 

For each of the 12 subgroups differing recommendations exist for the three food categories. If these nutritional recommendations sound somewhat complex to you, I had to re-read them about a dozen times to get the drift myself. Although I don’t want to get ahead of the game, for the observant reader, you may be curious to know how Dr. D’Adamo dreamed up this complex dietary system and if a long trail of experimental human clinical trials exist to support Peter’s recommendations? I, too, had to ask myself these same questions.


Before we get into the science or lack thereof of the blood type diet, I’ve got to flesh out a few more of the underlying concepts. Dr. D'Adamo believes that blood group O ("O for Old") was the earliest human blood type and that all humans at one time maintained this blood group before the subsequent evolutionary appearance of blood types A, B and AB (reference 1, pp. 6-13). Accordingly, Peter believes that people with the O blood type had ancestors who were skillful hunters and whose diets were high in meat and animal proteins. For modern people with the O blood type he advocates a high meat, low carbohydrate "hunter" diet, with virtually no wheat, few grains or legumes and limited dairy products. Do these dietary recommendations ring a bell for you, or sound vaguely familiar? Keep this thought in mind, as it may well explain the lasting popularity of Peter’s first book.


Peter now goes on to explain to us that blood group A ("A is for Agrarian") "appeared somewhere in Asia or the Middle East between 25,000 and 15,000 B.C." . . . and "allowed them to better tolerate and absorb cultivated grains and other agricultural products" (reference 1, p. 8). For type A’s, Dr. D’Adamo recommends a mainly vegetarian diet - the diet that he personally follows. However, more importantly he recommends that blood type A’s also avoid wheat and dairy (do these recommendations also sound familiar?) and replace meats with some "highly beneficial" fish and seafood – Hmm, lots of fresh fruits and veggies for type A’s, little wheat or dairy and fish instead of meat? Keep these recommendations in mind.


Peter next tells us that blood type B, "developed sometime between 10,000 and 15,000 B.C. in the area of the Himalayan highlands – now part of present-day Pakistan and India (reference 1, p. 10). Peter suggests that type B’s have evolved the most varied diet and can include both meats and dairy in their daily menu, but again should avoid wheat. Before we move on to the final blood type (AB) it should be noted that Dr. D’Adamo generally eschews highly processed foods (chips, pastries, candy, ice cream, snack food, fast food, etc.) for all blood groups – once again, does this not sound like another familiar dietary suggestion?


From Peter’s diagram on page 6 of his book, he indicates that blood type AB appeared first in humans sometime between 500 B.C. and 900 A.D. He characterizes "AB is for Modern" and states "Until ten or twelve centuries ago, there was no Type AB blood." (reference 1, p. 13). Peter indicates that AB’s are a conglomeration of type A and type B blood types, and consequently their diets should reflect a mixture of the recommendations he makes for these blood groups. AB’s are therefore advised to eat meats, seafood and dairy, and to once again avoid wheat.

 

The Reality And The Science Of Blood Type Diets


The reality of Dr. D’Adamo’s book, Eat Right 4 Your Type, is that it has overwhelmingly become one of the sustained, best selling diet books of the past two decades, and continues to sell well on Amazon and other retail outlets – 14 years after its initial release in 1996. Unfortunately, as I will shortly demonstrate, Dr. D’Adamo’s explanations for the health-promoting effects of his diet have little or nothing to do with ABO blood groups. His claims about the origins of human blood types and the dietary selective pressures which elicited the four common blood types are completely incorrect and have no basis in the current scientific literature. By critically examining the faulty concepts and evidence underlying this book, it becomes almost comical how Peter’s series of errors, incorrect assumptions and conclusions actually ended up with dietary recommendations that may have therapeutic value for about 60% or more of the world’s population. The paradoxical nature of this book (bad science, pretty good dietary recommendations) helps to explain its lasting commercial success.

 

Actual Origins of Human Blood Types


Peter’s suggestion that O is the original human blood type is incorrect. Studies in humans, chimpanzees and bonobos (a specific type of chimpanzee) show that alleles (different versions of genes) coding for the A blood type was actually the most ancient version of the ABO blood group, and was shared prior to the evolutionary split between chimpanzees and hominids five to six million years ago3-5. Hence, Peter’s suggestion that blood type A appeared 15,000 to 25,000 years B.C. in response to dietary changes brought about by the new foods (i.e. grains) of the agricultural revolution is not only incorrect, but off base by about five million years. Now, let’s play a little game of logic and apply the correct data to Peter’s reasoning that "the original ancestral human blood type should be eating a high protein meat based diet." Since type A is the actual ancestral human blood type (rather than O), if we use Peter’s logic then he - himself a type A - should not be following a vegetarian diet, but rather a high protein meat based diet. These kinds of games of logic - although fun to play - more importantly underscore the fundamental and incorrect assumptions upon which Peter’s book is based.


The next blood type that appeared in the human lineage was B - which split from A - about 3.5 million years ago 3-5, not the recent 10,000 to 15,000 years B.C. origin that Peter has proposed. The O blood type split from A about 2.5 million years ago3-5 and consequently does not represent the oldest blood type as claimed by Peter. The only fact that Peter correctly deduced about the origin of human blood types was that AB was the youngest, but once again he completely missed the correct date, as it was actually about 260,000 years ago3 - not the mere 1,500 years ago that he has proposed.


So Peter has got all of his blood group origins messed up, his dates wrong, and the evolutionary splits incorrect. Why does this matter and how does it affect his dietary theories? To begin with, even if we were to believe in Peter’s underlying assumptions that diets should be prescribed upon blood types, he would have to completely revamp his original recommendations. Type A’s should be eating a high protein, meat-based diet rather than the vegetarian fare he suggests. But what about type O’s? With the correct evolutionary information, should they now be eating a vegetarian menu? And what about type B’s and type AB’s – what should they now be eating? Most telling of the logical failings of Peter’s blood type diet is the observation that all four of the major blood types had evolved almost 250,000 years before the coming of the Agricultural Revolution 10,000 years ago. Yet Peter would have us convinced that three of the four major blood groups only came into existence slightly before or after the Agricultural Revolution, and as a direct result from dietary selective pressures wrought by Neolithic food introductions.


So, why has Peter’s book become one of the best selling diet books in the past two decades? Because it works – but only for about 44-62% of the people who adopt it. Remember that for blood type O, Peter advocates a high meat, low carbohydrate "hunter" diet; with virtually no wheat, few grains or legumes and limited dairy products. If we look at the frequencies of the four major blood types for the entire world population, blood type O is by far the most frequently occurring version. It is found in 62% of all the world’s people, followed by A (21%), B (16%) and AB (1-3%)6. In the United States, the four blood type frequencies are O (44%), A (42%), B (10%) and AB (4%)7. So you can see that Peter has essentially advocated a diet similar to the Paleo Diet for between 44 and 62% of his readers. Quite simply, Peter’s diet works for about 44 to 62% of the people who adopt it – not because of their blood type, but because it emulates the same diet that natural selection has designed for us all.

 

References:

  • D'Adamo, P. with Whitney, C. Eat Right 4 your Type: The Individualized Diet Solution to Staying Healthy, Living Longer & Achieving Your Ideal Weight. Putnam’s Sons, New York, 1996.
  • D’Adamo, J. One man's food--is someone else's poison. R. Marek Publisher, 1980.
  • Calafell F, Roubinet F, Ramírez-Soriano A, Saitou N, Bertranpetit J, Blancher A. Evolutionary dynamics of the human ABO gene. Hum Genet. 2008 Sep;124(2):123-35.
  • Saitou N, Yamamoto F. Evolution of primate ABO blood group genes and their homologous genes. Mol Biol Evol. 1997 Apr;14(4):399-411.
  • Lalueza-Fox C, Gigli E, de la Rasilla M, Fortea J, Rosas A, Bertranpetit J, Krause J. Genetic characterization of the ABO blood group in Neandertals. BMC Evol Biol. 2008 Dec 24;8:342.
  • Mourant AE, Kopec AC, Domaniewska-Sobczak K. The Distribution of the Human Blood Groups and other Polymorphisms. Oxford University Press, London, 1976, p. 6.
  • Stanford School of Medicine, Blood Center.

 

Comments  

+7 # Guest 2010-07-28 20:50
I agree with you, blood type diets do not sound scientifically for me. I did a lot of research on it because I have trainers around me (I'm working at the gym) being focused on it only, but I am biochemist at first place, I need facts and facts and facts only to make my decisions. Also my experience doesn't support this concept as well.
And it's still so many different factors affecting people's metabolism!
+7 # Guest 2011-02-25 21:27
Blood type diets are great. I had Doctors who could not help my migraines and other issues. Once I started following the diet with he help of a Naturopathic Doctor my symptoms have gone and when I go off the diet the symptoms return. Years of medication caused problems with my kidneys now I am healing much better
-1 # Guest 2010-09-03 01:57
D'Adamo has furthur refined his concepts with his GenoType diet which is much more liberal and takes more genetic components into the mix.
+8 # Guest 2010-10-28 15:50
I am type A and tried a vegetarian diet and was in complete tummy distress the whole time.. I had to quit as I developed an infection in my gut. Back to what works and that is low carb for me.. So I truly believe in this review..
# Guest 2011-01-05 03:50
I agree that the blood type diet doesn't sound quite right... but what is a good scientific way to determine what foods your body doesn't do well with? Blood allergy test?
+7 # Guest 2011-01-30 19:42
Intolerance blood testing can done through Gemoscan www.gemoscan.com to determine which foods you have built antibodies to. This is the same technology that they use to determine if a transplant recipient would accept or reject a donated organ.
If you repeatedly consume foods that your body cannot break down, it will create antibodies to wage a war against the offending substance. The result is inflammation that leads to a host of symptoms.
This testing will not determine what you are in fact allergic to, only your intolerances. It can give you a very clear starting point to formulate your own personalized diet. Once you have removed your intolerances it is easier to determine your allergies.
Allergy is a hypersensitivity disorder of the immune system that creates a rapid response to a substance that the body has come in contact with through ingestion, inhalation or topical exposure. Reactions occur within a short period of time and can include, but are not limited to, itchiness, hives, sneezing, runny nose, throat restriction, difficulty breathing, stomach pains and headaches. Some of these symptoms can also indicate an intolerance but usually take a bit longer to manifest (up to 72 hours.)
It is also possible to be allergic and intolerant to the same substance. For example I know I am allergic to milk as my throat starts to close and my breathing becomes laboured with in minutes of drinking anything with dairy. My Gemoscan blood analysis also shows that I built antibodies against dairy of all types. In contrast I also have the same allergic reaction to soy but my blood analysis did not indicate an intolerance.
One of the best ways to determine your allergies is through an elimination diet. This technique removes all common allergens for a period of time and then introduces them one by one back into the diet. Complete instructions on how to go about this can be found in my sister's new book Meals that Heal Inflammation.
+20 # Guest 2011-02-20 18:14
I have thought for a long time that eating for my blood type made sense. For years I was a vegetarian, then switched over to Vegan. I went this route because I was having a hard time with my stomach. I would get sick about 20 min after eating meat. About 6+ months into my Vegan eating, I became very ill. Emotionally and physically. My adrenal crashed, hormones crashed and my Vit D level dropped into the 20s. After doing a food allergy test with my ND, I found I should avoid eggs, dairy and gluten. So, as a Vegan, what do you eat? It was then that I heard about eating for my blood type (which is O-). I did some research, and found the food that came up on my list was on the foods to avoid list for type O people. so, to me, this made sense and I felt that this was the diet for me. After doing more research, I am now thinking I should not take this literally and just as a suggested food plan. I have found some items on my to eat list can cause stomach problems for me and foods that i should avoid I don't have any reaction too. I don't think this diet is 100% accurate. I think in this day an age, eating is a lot more complex, especially when you add in GMO food, and other chemically induced food products. At this point, I have given up on trying to figure out the perfect diet/food plan. It is too complicated now. A multi-billion dollar industry that is taking away our own innate sense of what we know is good for us. We should take over our own health and diet. Listen and pay attention to your body, it will tell you what you need. I need...chocolate. =)
# Guest 2011-07-03 22:54
After doing research for my nutrition classes, I found little-to-no support for this diet (other than the person who financially gains from it). Some people say it works for them with plenty of people finding the opposite reaction; unfortunately, many believe in the theory behind the book to be the reason it works for them instead of looking at a larger picture as it is very possible to have, coincidentally, good or negative reactions to foods that line up with a suggested diet. Follow the diet that works specifically for you, with care and through trial and error. It's called pseudoscience because it sounds like it could be scientifically sound. As mentioned above, there are plenty of methods to determine intolerances and allergies to foods, including the elimination diet without going on a limited, prolonged diet that could potentially do more harm than good.
-1 # Julie Daniluk 2011-07-04 02:49
Hi Jules,

Very good points. This is the reason why I say "There are 6.5 billion diets for 6.5 billion people."

Cheers, Julie
+2 # Guest 2011-08-30 20:37
I went on this diet(for Type A) because I was going through menopause and having delibilitating hot flashes many times per day. After about 2-3 weeks on the diet, my hot flashes disappeared, only to recur whenever I ate something I shouldn't. I know this was not psychological, because I had just begun the diet and didn't have the food lists memorized. If I got a hot flash, I would think about what I just ate, check the list, and sure enough that food would be on the "avoid" list. I am long since past menopause, but I have found I have to stay on the diet because I get various negative reactions to foods the diet says I shouldn't eat. Again this is not psychological. For instance. I absolutely cannot tolerate tomatoes at all due to severe indigestion, and shellfish makes me feel "heavy" and aggravated the day after I eat it. There are some foods on the Type A avoid list that used to be my favorite foods and never used to bother me, but since I went on this diet, these foods DO bother me. I am not happy about this and wish I could get off this diet, but every time I eat something I shouldn't, I do get some type of reaction I'd rather not experience. I feel like I've ruined my digestive system and I will have to avoid these foods for the rest of my life. I would not recommend this diet in general because of this - though I have to admit, it did cure my hot flashes when all else failed. If someone has a recommendation as to how to get off this diet with no ill effects, I would appreciate their letting me know. Thanks all.
Gerri
+2 # Julie Daniluk 2011-08-30 23:05
I would recommend seeing a ND for a full work-up. You maybe missing some key nutrients or enzymes. There are so many reasons why people become unable to digest certain foods. If you live in the Toronto area I can recommend a few NDs that could help you.

Cheers, Julie
+1 # Guest 2012-01-22 18:21
I just got introduced to the blood type diet recently by a friend, since i read the book i became so confused of what to eat knowing that i didn't have any problem with my current diet ..i have a high metabolisim and no matter what i eat and how much i eat my stomach *crash*them and my weight is perfect to my hight,i never been on a diet my whole life ,but since I'm 50 years old now and trying to stay fit and careful of what to eat the blood type diet cinfused my LIFE :) should i follow its instructions or NOT ...especially that all the avoid list for my blood type (B-) are my favorite food..:((( plzzz help
+1 # Julie Daniluk 2012-01-23 22:07
I truly believe there are 7 billion diets for 7 billion people on this planet not just 4. Every person is unique and needs to figure out what works for them. There are so many other factors involved in what you can and cannot eat that go beyond which blood type you are.

For example, years ago I experience a case of food poisoning that almost killed me. It left my digestive system so badly damaged I was unable to digest many carbohydrates. In my case this damage wouldn't let me eat most of the foods on my blood type list. I do not believe I am alone in this.

If you haven't experienced any symptoms of inflammation or disease, then you could be one of those lucky people who do very well with a wide variety of foods.

If you are experiencing some symptoms you may want to consider intolerance blood testing to rule out possible inflammatory foods.

Intolerance blood testing can be done through Gemoscan http://www.hemocode.com/ or Doctors Data www.doctorsdata.com

Testing your blood will determine which foods you have built antibodies to. This is the same technology that they use to determine if a transplant recipient would accept or reject a donated organ.

It can give you a very clear starting point to formulate your own personalized diet. Once you have removed your intolerances and allergies, you body has a chance to heal.

Food Allergy & Intolerance Testing an be performed by the following practitioner in the Toronto area:

Dr. Kate Wharton N.D
246 Albaby Avenue, Toronto, Ontario
647-435-5131
http://naturalbalance.vpweb.ca/default.html

She uses Doctor's Data, Inc., (DDI) a fully licensed and certified independent clinical laboratory with over 30 years' experience, provides high quality specialty testing to healthcare practitioners worldwide. DDI's tests are utilized in the assessment , detection, prevention, and treatment of heavy metal burden, nutritional deficiencies, gastrointestinal function, hepatic detoxification, metabolic abnormalities, and diseases of environmental origin.

Web site: www.doctorsdata.com Email: inquiries@doctorsdata.com

Cheers, Julie
+2 # Guest 2012-03-02 17:06
I'm a Type A person and don't do well on grains at all.

Whenever I try to incorporate grains into my diet, cut down on protein and good healthy fats, I end up totally stuffing my digestion for days. Its not some detox thing either, because it doesn't go away. I was constantly hungry all the time and instead of losing weight, I gained it!

My body loves its protein. If I have a little protein at each meal, I'm never hungry in between, my digestion is happy and chugs along contentedly and I have energy to do whatever I want. Plus I lose weight effortlessly.

What does work for me is avoiding sugar and wheat. I'm not gluten intolerant, but I feel really well when I avoid wheat in my diet as much as possible. So I stick to gluten free.

I agree totally with the second paragraph in this article, every body is different. Its horses for courses really, just find what works for your body and enjoy!
+1 # Julie Daniluk 2012-03-02 17:35
Hi Sereena,

My diet is now similar to yours. I do not do well on grains. I must eat high quality proteins, good fats and lots of veggies to keep up with my crazy schedule.

Sugar is my kryptonite!

Cheers, Julie
# Guest 2012-03-02 18:44
Hahaha, yes Julie, I know where you're coming from about the kryptonite!! :D
-1 # Julie Daniluk 2012-03-02 19:01
:lol:
+1 # Guest 2012-04-14 21:05
This diet makes perfect sense to me. I always used to feel cold, tired and sluggish after meals (or all the time). I totally believe that I was eating incorrectly for my blood type. Since I switched to a type A diet, I have more energy, better skin and have lost weight and I feel great. My partner is a type O and he always used to tell me to eat loads of protein throughout the day, as this would speed up my metabolism - and it never worked for me but always kept him in shape!! I have total faith in the blood type diet. It may mean I have to cut out a lot of my fave foods, but I feel a 100 times better for it. There must be some truth in it.
+1 # Julie Daniluk 2012-04-14 23:05
Hello Rebecca,

Thank you for your feedback! I appreciate the fact you took the time to tell me about your experience. I am glad you and your partner have found a diet that works for both of you. That is the most important part.

Organically yours,

Julie
+1 # Guest 2012-05-02 19:30
I think the first sentence says it all.
"I am often asked what I think of the Blood Type Diet. It seems to help so many people yet others find it very frustrating to follow and limiting."
I think there are two sentences in the second sentence - first sentence is "it helps so many people"...second sentence is, "humans want to put in their mouth what they want to put in their mouth and the heck with restricting our taste buds." So likely, the second sentence does not say anything about whether the phylosophy/science is good or not; it just explains the weakness of human nature.
I am a Canadian who believes there is something in this. Two South Africans I know have expressed belief. Yes, the science is not studied a whole lot yet; so why are there so many minds discrediting something that is working for people. Should we not explore this field of science more?
# Julie Daniluk 2012-05-04 13:02
Hello Mark,

I still come back to the fact there are 7 billion diets for 7 billion people not 4. This diet maybe a good launching point to help some people to figure out what is best for them, but I don't believe it is the definitive answer. Both my sister and I eat an extremely strict diet of 80% vegetation with 20% organic animal protein, raw nut/seed and oils. No grains, beans, dairy or sugar. We are both celiac and cannot digest any grains or beans yet both of us are of the blood type A group that suggests we should eat a vegetarian diet.

We both were strict vegetarians/vegans for over 15 years and it did serious harm to our bodies. We could not break down the proteins/carbs no matter how much we cleansed. We have undergone countless therapies to heal our digestive in order to eat a vegetarian diet but our bodies did not start to heal until we addressed our food allergies and intolerances. The “Eat Right for Your Blood Type” does not address these concerns. According to this diet “Type As have low stomach-acid content, therefore they have a hard time digesting meat.” My sister has been repeated tested for her acid level and it has never been low. She digests meat easily. It is physically impossible for her to break down soy or other types of beans and these caused perfuse diarrhea, boating, bleeding of the bowel and inflammation that leads to arthritis. The same goes for grain.

I respect that there are people who have had success with this diet but I cannot endorse the concept that there are 4 diets on the planet. This does not take into account a person’s personal medical history or the environment they have grown up or live in now. After observing thousands of clients over the years, I feel there are too many factors involved to simply narrow it down to 4 lists of food.

Yours in good health,

Julie
# Guest 2012-08-31 13:29
I found my blood type out for the first time today- that alone was an interesting process! I went to Live Blood London where my blood was looked at and to my delight was healthy enough. I have no problems and no readon to have gone besides curiosity. In terms of blood types and the diet I had run through before with the lady foods that I didnt like or didn't make me feel good- mayonnaise, ketchup, mixing ham and cheese, anything cream based, lobster, crayfish - and all of them were in my Type A 'no list'.
I found it really interesting! I appreciate everyone is different but I would like to read the book!
# Julie Daniluk 2012-08-31 14:27
Hello Susie,

Thanks for writing in! It's good to know that you have figure out what works for you. There are many items on my so called blood type 'no' list that I can not digest and many that I thrive on.

Glad to hear your blood analysis reflexed your good health.

Cheers, Julie
# Guest 2012-10-02 02:54
Hi, I work with holistic doctors and practitioners - some believe in the diet completely - others do not. I have tried it and found, through various modes of tests, that I need some of the foods my AB type says I cannot have. There is blood testing, skin testing, electral dermal testing, muscle testing, DNA hair testing for intolerances, IGG, IGM . . . and the elimination diet. I need red meat and have tested for it being fine for me, yet I am only supposed to have lamb and turkey. The key to anyone's proper diet is staying away from processed, boxed, canned, microwaved, smoked fooks, rancid oils, :fake" oils, butters, and sweeteners. Stick with whole foods, non GMO and meats that are organic, grass fed (see Food, Inc dvd) and organic vegetables, fruits, and no ENRICHED grains. If you use dairy the healthiest form is UNPASTEURIZED, even though many are afraid of it. And don't forget the elimination diet.
+1 # Julie Daniluk 2012-10-09 21:31
Hello Nis,

Thanks for writing in! I agree with a lot of what you have said.

Kind regards, Julie
+2 # Guest 2013-01-09 16:27
I think the naysayers to this diet are forgetting one key fact about the food we ingest....it is essential to eat foods that are non GMO (Peter says this in his information) . If you dont you may as well forget about following any diet. furthermore the wheat we ingest now is not the wheat that we "used to" . It has been genetecally modified as well....No one should eat wheat now as the majority of the population will have some adverse affect from it .
+1 # Julie Daniluk 2013-01-09 17:22
Hi Tanya,

Thanks for writing in. I believe that the blood type diet and eating GMOs are two different topics. I have been an anti-GMO activist for over 15 years. I believe GMOs are a dangerous experiment this is having devastating consequences to our health and environment.

I do not believe the Eat Right For Your Blood Type diet is appropriate for everyone. For example, my sister is completely intolerant to soy. Any amount will cause her digestive problems. Yet according to her blood type, she should be eating soy. The Eat Right For Your Blood Type diet simply does not take into account food intolerances or allergies.

To clarify the wheat issue...I agree that no one should be eating wheat. (I suggest reading the book The Wheat Belly) but genetically modified wheat has not been released onto the market anywhere in the world. It is still relatively new. The wheat we are consuming is a highly hybridized wheat which, as you say, is not what we used to eating.

Cheers, Julie
# Guest 2013-02-07 21:19
Thanks for posting this article. I've been having digestive issues and thought that the Blood-type diet might be the answer. But trying to implement it has been almost impossible! It is counter-intuitive for me - like Seerena above - I'm type A, yet feel sluggish when I DON'T eat protein. I also have serious nut/soy allergies, so that's not a healthy alternative to meat protein in my case! Plus I find it's so limiting that it's no wonder someone would lose weight - it feels like you're barely eating! After reading your article I think my new course of action will be more "common sense" - lots of fresh fruits and veggies, lean proteins, avoiding wheat and GMO's... Moderation, right? And I think I'll seek out a naturopath to take some of the other tests you've suggested. Thanks again! :)
# Julie Daniluk 2013-02-08 16:38
Hi Shannon,

Thanks for the feedback! I agree, the diet does appear to be counter intuitive. An investigative approach of journalling your food intake and symptoms over a period of 3 months is very effective. An ND can also run some bloods work to help you as well.

Good luck on your health journey!

Cheers, Julie
+1 # Guest 2013-02-13 23:56
I think we should all be able to afford health care. if we make less visits to the doctor due to a 20$ book i say go for it! no more pills is bad for medical monopolies.as fo eat eight for your blood type it seems to work 60% of the time any thing above 50% is good for me.as the other 40% find something that dose work.If a had worte this book i would be testing this 40% to come up with a new book.Time will allways tell the truth. :lol:
+1 # Julie Daniluk 2013-02-16 13:36
Hello Eshage,

Thanks for your comment. Yes, time usually has a way of revealing the truth.

Cheers, Julie
# Guest 2013-02-15 22:13
About 9 years ago, I decided that I needed to lose a lot of weight, I had always been slim until the birth of my second baby! BOOM! 5ft4 and 240lbs! Not good! Anyway, I'm O type and I decided to give it a go. I stayed faithful to the diet for 2 years, lost 110lbs. I have gained a bit back soley because of wheat, and I know that. My stomach pain is also from wheat. Of course I'm a complete carb addict and love breads! Overall, I love this eating style and am glad to say that I am back at it again. I feel full of energy, alert and just wonderful as a whole. With all of that said, just because it works for me doesn't mean it will work for everyone else, everyone is different. Need to find what works best for you and what are your healthiest options. :lol:
# Julie Daniluk 2013-02-16 13:39
Hello Trish,

Thanks for sharing your story. I feel a big reason why this diet works for some people is that some of the blood types are told to remove common allergens such as gluten (wheat) and dairy. It would be interesting to see how many people felt better if they allowed to keep those foods in their diet.

Cheers, Julie
# Guest 2013-05-13 15:06
I read eat right for your blood type as a vegatarian...I am type O, well the book as you know suggested that I eat meat, lots of it and avoid wheat gluten, etc. Now i know why i feel like my energy just drops out from under me when I have certian foods, and other foods keep me running at top speed. I think his book was helpful to me.

Minky.
# Julie Daniluk 2013-05-14 17:46
Hello Minky,

Thanks for writing in! Good to hear from you. I am glad you found the help you needed.

Cheers, Julie
# jasmine 2013-08-10 20:43
Well thanks for this article. I think everyone is looking for a miracle food or pill etc to either cure an ailment/s they have or to prevent and remain healthy, that whenever someone promotes something everyone wants to jump on the bandwagon. I knew where you were getting at every time you put the emphasis on *wheat free*. I said yep that sounds like a paleo diet to me. People don't seem to realize that not just wheat but gluten found in basically all grains cause health issues. And because this is eliminated from the blood type diet maybe that is why they benefit. I mean lets face it even healthy foods aren't that healthy. Most foods are gmo products,injected with so much crap. Not to mention the artificial colors and ingredients, which this so called miracle diet eliminates.These type of foods are to be avoided no matter what blood type. And thats why hence it works for some because those processed foods (which we all suffer from, even if we don't realize it now) aren't mentioned in this blood type diet. Like you said there are 7 billion diets for 7 billion people. Regardless of of who has what blood type. My sis and me have the same blood type and what works for her doesn't work for me and vice versa. And that is type b (no I will not be eliminating chicken out of my diet). I decided to go grain, (except for rice and certain ones), legumes, dairy , beef/pork/goat/lamb (anything outside of turkey,chicken &seafood) free.Oh yeah not to mention no more soy. Basically the paleo diet but with my own twist to it. I think most of us if not all can salut to the fact that processed food are the main culprit and we could all benefit from staying clear of them.

Cheerios :)
# Julie Daniluk 2013-08-12 13:28
Thanks for writing in Jasmine!
Well said!
Cheers, Julie
# Tara Mills 2013-09-21 16:59
I'm glad that I found this site. Four or five years ago I had a computerized electro dermal test with a naturopath and the results were printed out for me. Recently I became interested in Dr. D'Adamo's theory. I am type O but decided to go further and be tested for secretor status. Unfortunately for me, I'm a non-secretor which if following the beneficials and avoids, is a more restricted diet. I dug out my EDT results to compare and while many intolerances are the same as they are on the Avoid list, many are not, and some listed as Beneficial are an avoid in my food intolerance test. For example, Cod is one of the Beneficials for an O non-secretor and is an Avoid (#63) on my EDT list. So here I am, intolerant to Cod and told that Cod is beneficial for my health according to Dr D'Adamo's theory. Very confusing! It troubles me that so many will just accept the Eat Right for your Type theory non knowing that they may be eating the very food that their body has an intolerance to. (sorry for the verbosity here :-),
Tara
# Julie Daniluk 2013-09-21 17:18
Hello Tara,

Thanks for writing in!
I have had many people tell me similar stories.
A good example of this is my sister who was told she can eat peanuts and soy when she is allergy to both of them. If she followed the blood type diet, she would be very sick.

Cheers, julie
# Brenda 2014-01-09 05:10
I tried the blood type diet for about 2 months. I am and A positive. For me, I was supposed to be eating primarily grains, veggies and very little meat. The diet did not do a thing for me but make me sicker. I have hypothyroidism and did not get good results until I followed a paleo diet and eliminated all grains. I also added coconut oil to my diet (which is an avoid for ALL blood types according to the blood type diet). It took only a few weeks before I began see good results. I continue to follow a grain-free diet and my thyroid issues are improving every day. For me, the blood type diet seems to be a way for this "doctor" to sell a lot of books and nothing more.
# juliedaniluk 2014-01-09 20:40
:-) Thanks for writing in Brenda. I couldn't agree with you more. My issues were identical to yours. Grain free is best for me!

Cheers, Julie

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