The Blood Type Diet

The Blood Type Diet was devised by Dr Peter D'Adamo ND (Naturopathic Doctorate) and details of the four diets for each blood group are detailed in his book "Eat Right 4 Your Type". According to the cover of the book The Blood Type Diet provides "The Individualized Diet Solution to Staying Healthy, LIving Longer and Achieving Your Ideal Weight". The book was first published in 1996 and was voted one of the "Ten Most Influential Health Books of All Time". It has become an international best seller, being translated into more than fifty languages, with more than four million copies in print and it has its following of celebrities on both side of the "Pond" such as Jennifer Lopez, Ellen DeGeneres, Hugh Grant, Elizabeth Hurley and Martine McCutcheon.

Dr Peter D'Adamo

Dr Peter J D'Adamo is a second generation naturopathic doctor who gained his Naturopathic Doctorate (ND) in 1982 from Bastyr College, Seattle. He has a medical practice in Wilton Connecticut and he has been practicing naturopathic medicine for over 20 years. He is licensed as a naturopathic physician in Connecticut, California, British Columbia, Washington, Ontario and Arizona.

The Thinking behind the Diet

Dr D'Adamo decided that there had to be a reason why some people lose weight and others do not whilst eating the same foods and why some people age better than others and why some people get ill and others don't.

Following research into medical history, genetics and anthropology Dr D'Adamo concluded that blood type was the answer to this conundrum., He believes our bodies ability to deal with different nutrients is determined by our blood group and he has based his theory on the idea that each blood group has its own unique antigen marker, a substance that the body recognises as being alien and each of these markers reacts badly with certain foods which could lead to all sorts of potential health problems. Dr D’Adamo believes that, if you follow a diet designed for your blood type, your body will digests and absorbs food more easily and efficiently and you will lose weight.

However Dr D'Adamo's theory is considered to be unsupported by scientific evidence by scientists, dieticians and physicians.

Dr Peter D'Adamo - Blood Type O Diet

The Four Diets

Dr D'Adamo had devised four diets for each of the four basic blood types:

  • O - the hunter
  • A - the cultivator
  • B - the nomad
  • AB - the enigma

Blood Type O

Blood Type O was the first blood type and Dr D’Adamo believes that our digestive tracts have retained the memories of ancient times and the ancestors of the Type O blood type were hunter gatherers because of this he recommends a diet that

· Is high in lean meats, poultry and fish

· Avoids dairy products, grains, bread, legumes and beans

· Is high in fruit and vegetables but avoiding brassicas such as cabbage, brussel sprouts, cauliflower and nightshade family plants such as potatoes and eggplant (aubergine)

· Avoids caffeine and alcohol

Blood Type O Food, Beverage and Supplemental Lists

Dr Peter D'Adamo - Blood Type A Diet

Blood Type A

Blood type A was the next blood type to evolve and the ancestors of the Type A blood type were farmers and Dr D’Adamo recommends a vegetarian diet that

· Is high in fruit and vegetables but avoids potatoes, cabbage,tomatoes, peppers, oranges, mangoes and papaya. .

· Avoids dairy products apart from small quantities of fermented dairy products such as yoghurt and low fat sour cream.

· Is high in legumes and beans and to a lesser degree nuts and seeds

Blood Type A Food, Beverage and Supplemental Lists

Blood Type B

Blood type B evolved in the Himalayan highlands which are now part of Pakistan and India.  It may have been a genetic mutation in response to the colder climate but the ancestors of Type B blood are considered by Dr D’Adamo to have developed the ability to thrive in changeable conditions.  He recommends a diet that

·        Is high in all lean meats with the exception of chicken.

·        Is rich in dairy foods and deep ocean fish

·        Avoids nuts and seeds and shellfish

·        Is high in fruit and vegetables but avoiding tomatoes

Blood Type B Food, Beverage and Supplemental Lists

Dr Peter D'Adamo - Blood Types B and ABs Diets

Blood Type AB

Blood type AB is the most recent blood type to appear and it evolved from the combining of blood types A and B. Possibly not unsurprisingly Dr D’Adamo recommends a combination of the diets for each of these blood groups that

· Is high in fruit and vegetables including tomatoes

· Contains dairy foods and seafood

· Avoids caffeine and alcohol

· Contains grains and tofu and nuts and seeds to a small degree

This article is one of a series that I've written reviewing some of the more popular weight loss and lifestyle programs. If you found this article interesting you may enjoy reading the others in the series which are

More by this Author

Comments 42 comments

Amber Allen profile image

Amber Allen 4 years ago Author

Hi RebeccaCurz

Thanks for commenting. I hope it works out well for you.


RebeccaCurz profile image

RebeccaCurz 4 years ago from United States

Aha... Thanks for the nice info.. now I can avoid any foods that are now allowed with my blood type.

Amber Allen profile image

Amber Allen 5 years ago Author

Hi hatailor

I don't fit the profile for my blood type but did think that the diet might be of interest to some people which is why I reviewed the book.


hatailor 5 years ago

The author is nicely saying that the blood type diet is all nonsense (and the 'naturopath' is laughing all the way to the bank). So why is every comment positive?

Because the author basically recommends avoidance of simple carbs and gives only minor modifications by blood type. So any blood type version you follow will work !

Amber Allen profile image

Amber Allen 5 years ago Author

Hi Stephen

The diet has worked out very well for you and has helped you turn your life around.



Stephen 5 years ago

I was told to try the diet since I am a O type. I got the book and followed the plan so far for 4 months. I cut out bread and dairy because that's what it recommended. I am so happy to say I have lost 29 pounds in 4 months by just cutting out wheat bread and dairy. It was hard at first but when I saw the results I will never go back to my old eating ways. And now I don't even crave dairy or bread. Stick with your blood types diet and your life will change. My energy is sky high and my stress is gone. By the way, I am off my anti depressants now too. This diet was a game changer for me. Good luck!

Amber Allen profile image

Amber Allen 5 years ago Author

Thanks Roy!


Roy Mckinney 5 years ago

nice hub dear...

Amber Allen profile image

Amber Allen 6 years ago Author

Hello aetennis

Thank you for reading my hub and commenting. I hope your expereimenting with a vegetarian diet works out for you.


aetennis profile image

aetennis 6 years ago

I'm type A and I love meat. I should try a vegetarian diet and see how it goes. Great hub! Thanks.

Amber Allen profile image

Amber Allen 6 years ago Author

Hi Stacie

I think the four types are a little narrow. Perhaps you needed to adjust the diet to suit you - as I've said I'm an A group with a gluten intolerance. Nice to meet you.


Stacie L profile image

Stacie L 6 years ago

I read about this and tried to eat a diet made for my blood type,but just couldn't stick with it.

good hub..

Amber Allen profile image

Amber Allen 6 years ago Author

Hi billy

It was a new concept to me too and whilst I'm not totally convinced there did seem to be some merit in the theory. I just don't think it went far enough - I think should probably be sub types within each blood type.

Thanks for commenting


billyaustindillon profile image

billyaustindillon 6 years ago

Never thought of a diet to suit your blood type Amber. I guess I better find out what my blood type is :)

Amber Allen profile image

Amber Allen 6 years ago Author

Thanks for your comment love of night. Amber:)

loveofnight profile image

loveofnight 6 years ago from Baltimore, Maryland

i have never heard of this before, this is an excellent idea.

Amber Allen profile image

Amber Allen 6 years ago Author

Hi Don

That is a great achievement and losing weight slowly is definitely the best method. You might be suffering from low blood sugar in the evening which is cauing you to feel hungry.


Don Simkovich profile image

Don Simkovich 6 years ago from Pasadena, CA

Hi Amber, I've lost 12 pounds since October . . . and my goal is another 5 - 7 lbs in the next 3 months. I'll look more closely at the blood type O . . . I've found my biggest battle is in not thinking about food at night . . . I almost always eat an omelette with a small amt of sausage, green peppers and onions for breakfast . . . and it helps me a great deal.

Amber Allen profile image

Amber Allen 6 years ago Author

Like you I think that four categories is too narrow. I'm an A blood group with a gluten intolerance so I don't fit the profile that well either but on the other hand a lot of the other things like exercise fitted me very well. I believe you just have to keep trying the different diets until you find one which works for you. I've just written a new hub on the New Atkins diet which now caters for vegetarians which you may find interesting.


vonny 6 years ago

I am O blood type but my profile fits an A type, am I not what you call the hunter ? leader. I tried the atkins diet in the past which is high in protein similar to the O blood type but it was awful, I do not eat much meat and in the end dreaded another protein meal. This diet cannot work for me and I think it's impossible to put everyone into 4 categories. I have however tried food combining which is excellent and weight loss is very fast.

Amber Allen profile image

Amber Allen 6 years ago Author

This was a new diet to me too! Amber:)

prettydarkhorse profile image

prettydarkhorse 6 years ago from US

this is the very first time I heard of this, nice, Maita

Amber Allen profile image

Amber Allen 6 years ago Author

Hi prasetio

Thanks for the thumbs up and rating up!


Amber Allen profile image

Amber Allen 6 years ago Author

Hello anginwu

AB blood type is quite unusual. I'm so pleased you've found my hub interesting and useful too!


prasetio30 profile image

prasetio30 6 years ago from malang-indonesia

I have heard about this diet before. I believe this useful for us. I am glad to follow your tips. good work and very well research. Tuhmbs up and I rate this hub. Thank you very much, Amber.


anglnwu profile image

anglnwu 6 years ago

Very interesting subject. I belong to the AB blood group and I eat almost all that's recommended. However, I really should eat more dairy. Thanks for the useful information.

Amber Allen profile image

Amber Allen 6 years ago Author

Hi fuscia

Welcome to Hubpages! Thanks for reading my hub, it is a fascinating subject.


Amber Allen profile image

Amber Allen 6 years ago Author

Hi Art

It is good to hear from you. I had no idea either but it seemed like an interesting subject for a hub. Thanks for the rating up.


Amber Allen profile image

Amber Allen 6 years ago Author


Thanks for rating up and your kind comments.


Amber Allen profile image

Amber Allen 6 years ago Author

Hi Sage

Thanks for taking the time to read my hub. The theory behind this diet was new to me too!


Amber Allen profile image

Amber Allen 6 years ago Author

Dear Pollyannalana

It must have been hard having suffered so many miscarriages I had at least three before I managed to carry my son full term but even then I almost lost him and he needed specialist care and transfusions of platelets for the first couple of weeks. The doctors had no idea what had caused the problem but decided it had something to do with me!


Amber Allen profile image

Amber Allen 6 years ago Author


I'm like you in as much as I think four blood types are too narrow because I'm an A+ with a gluten intolerance but having looked at what Dr D'Adamo has to say about exercise and other things he does seem to hit on something which the medical establishment just wants to ignore.


Amber Allen profile image

Amber Allen 6 years ago Author

Hi Katie

Thanks for the rating up. I think our blood types may hold the keys to lots of things and from what you said about your doctor this information has been out there for sometime.


fucsia profile image

fucsia 6 years ago

interesting topic ....Appears that the lectins, proteins with specific Agglutination properties, causing a chemical reaction with our blood and can, if they are incompatible with our blood, act as antigens.

very interesting!

profile image

TattoGuy 6 years ago

Jeeez I never knew you cud have blood type diets, aren't you the clever one, nice hub Amber, rated up by moi ; )

profile image

hubpageswriter 6 years ago

Power up. What a great and informative hub. The nutrient factors amaze me.

Sage Williams profile image

Sage Williams 6 years ago

Wow, great hub, very interesting and well written. I thought I had heard of every diet possible. But this is a new one. Great job.


Pollyannalana profile image

Pollyannalana 6 years ago from US

I have NB self on any card I have carried, all I really know about that is it use to be dangerous if negative blood female had possitive blood baby inside, usually causing the pregnancy to abort which happened to me several times, short of being a miscarriage, my body fighting something foreign but think they have something for that now. The two children I have are negative like me.

BkCreative profile image

BkCreative 6 years ago from Brooklyn, New York City

It's interesting that Dr. Charles Drew created blood typing decades ago but for some reason it is just ignored - probably because our medical profession knows nothing about nutrition - and just engages in pill pushing in a one size fits all type of mentality.

While I don't agree with D'Adamo that there are only 4 blood types on earth I think we are all somewhere around that range of types (maybe) - but as A positive - his diet suggestions fit me - type A bodies are alkaline so we should never eat meat or chicken (I don't) - too hard to digest - we need an acidic body like blood type O - but of course Americans eat abnormal amounts of flesh.

The diet and lifestyle suggestions in his book suits me - I love the beans and berries etc. The A types can drink coffee and I enjoy a cup now and then - but O types tend to become addicted - this is bad because coffee tends to be acidic and so is the O type. Lots of heartburn then.

I think the book is a good read - it offers a lot of good food for thought - and approaches our health with nutrition - which is what makes the most sense.

Thanks for a good hub!

katiem2 profile image

katiem2 6 years ago from I'm outta here

Amber, Ewww very interesting, That answers the question why I was born vegetarian, I'm type A positive, I remember my doctor telling my Mom not to worry about it that it was best for my blood type years ago, been a veg head all my life. Very interestin. Love this hub. I rate it up and call it a must read and share. Thanks and Peace :)

Amber Allen profile image

Amber Allen 6 years ago Author

Thanks for being the first to comment JJ. The theory behind the diets does seem to have some merits but unfortunately as a blood type A with a gluten intolerance I seemed to be the exception which proves the rule!!

jayjay40 profile image

jayjay40 6 years ago from Bristol England

Very interesting, I have never heard of this before so I have learned a lot. Thanks for sharing

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