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Official Website Of Dr. Peter J. D'Adamo & The Blood Type Diet®

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Comment from: funkymuse [Visitor]
Excellent. I'm glad you are going to react/respond. This guy is really getting away with bashing you about. Time to bring out the science guns. :)
08/17/08 @ 17:01
Comment from: Lloyd [Visitor]
What is always amusing to me is the varying levels of proof required by a skeptic. No matter how hard one works to provide the data requested there is always another request behind should you managed to irrefutably satisfy the first request. Heaven forbid that the standards given you to meet should be the same as for the skeptic's pet theory, no, the rules must be changed as the game is played.

The solution is to change to a different game. Force the challenger to verify his credentials in the area he critiques. Criticism without the attendant understanding and logic must be shown to be empty to be silenced. The best way to acheive this is to educate the critic. Usually the best one can do is educate the critic's audience.
08/17/08 @ 20:52
Comment from: Ron [Visitor]
Since Weil's claims are explicit and can be easily refuted, as you have done, are they not libel?

Webster's defines "libel" as, amongst its definitions, "a written or oral defamatory statement or representation that conveys an unjustly unfavorable impression; a statement or representation published without just cause and tending to expose another to public contempt."

Notice the repeated use of the root word "just" in these definitions. He leaves himself open to a libel suit when he claims, fraudulently, that there is "no evidence" for the role of lectins in diet or disease, when you yourself have already just presented us with multiple hundreds of such studies.

He's proclaiming himself an "expert"... and the minute he does that, he sets a standard of things he should know, ESPECIALLY when he makes such absolute and catastrophic claims BASED on his scaffold of "expertise".

I would totally sue him for libel. Hit him where he won't soon forget, and where will serve as an example to other priestly snipers: the wallet.
08/18/08 @ 00:39
Comment from: Dr. J. Cacciatore [Visitor] Email ·
Very interesting blog-- just bought the book and look forward to learning more!
08/18/08 @ 01:22
Comment from: Rob [Visitor]
Hey, I'd like to read your blog, but you should change your Font, it's illegible.

Better? --PD
08/18/08 @ 07:25
Comment from: funkymuse [Visitor]
I also agree with Ron. Especially since the AARP article. He is totally discrediting you based on nothing but his own personal opinion to millions of readers.
08/18/08 @ 11:30
Comment from: Laura [Visitor]
Good for you! It's about time somebody set him straight! Who made him the so called expert? HA
08/18/08 @ 11:38
Comment from: OSuzanna [Visitor]
It's a real head-shaker when the critic says there's no science, when there's tons of science. They just deny it's there!
You go, Dr. D! There're lots of healthier people running around alive because of your efforts.
08/18/08 @ 14:04
Comment from: Ron [Visitor]

The problem I have is that it's one thing for some willfully ignorant, loudmouth drunkard at a bar at 3 a.m. to have an "opinion" on something, and another thing entirely for someone like Andrew Weil, M.D., to do so... especially when he so widely and effectively casts his opinion on things of such great importance within his own self-appointed field of expertise, AND which have been exhaustively laid at his very feet by Peter D'Adamo, through the use of great numbers of meticulously-cited research studies to support his cause of genetically-compatible, lectin-based dietary and lifestyle protocol.

When someone like Weil casts his "opinion" on matters of alternative health -- which he himself has declared as his cause -- then, whether or not he wishes to acknowledge it, he must be held to the reasonable expectation of his giving a damn to actually study up on the subject before casting anything more than what he should qualify as only a TENTATIVE opinion.

But he doesn't do that. He holds high his banner of crusade, sounds the trumpets and rallies his legions of supporters to "attack the enemy", all based on his own willful ignorance and, not surprisingly, pan-galactic M.D. ego.

I've said it before, and I'll say it again: Allopathic medicine tried to play dirty, but the naturopaths and the naturopathic approach won the hearts and minds of the public. So, now, allopathy's goal is still of the dirty variety: it is nothing more than to absorb the very practices of natural medicine for itself, while all the while doing everything in its power to attempt to smear, slander and libel the right and proper practitioners of natural medicine, the naturopaths who bear the suffix "N.D." (such as Peter D'Adamo) right out of existence.

The allopaths have achieved an exclusive club of exclusive dominance, and they're madly determined to keep it that way... forever.

08/18/08 @ 17:45
Comment from: Mayflowers [Visitor]
I am not and will not be a member of AARP until they lovingly embrace that alternative medcine has a right to practice and promote it properly..

Perhaps when Dr. Weil loses about 70 pounds, he can make better comments about Natural Medicine.
08/19/08 @ 09:42
Comment from: Edna [Visitor]
Weil is a vapid, "holistic lite" spewer of statements designed to seem cutting edge, yet never threaten the status quo. He needs a new sweater collection, too. I suggest he study the sweaters of Bill Cosby, circa late '80's, to get an idea of what it means to put some pizazz, vim and verve into one's wardrobe. If Cosby's sweaters say "jazz", Weil's say "funeral dirge meets Grateful Dead noodley tangent". His "insights" are as dull as his sweaters.

I'm sticking with Dr. D.
08/19/08 @ 15:19
Comment from: ruthie [Visitor]
As for Dr Weil...
I would never take advice on health from someone who is obviously obese.
He needs to go on the GTD plan immediately.
08/20/08 @ 15:06
Comment from: Mo [Visitor]
I wish you'd refute Dr. Weil's article in the AARP Magazine itself. Readers need to be made aware of his bias.
I am a subscriber and was shocked to note that the good doc has called himself "Dr. Debunker."

Somewhere along the line he sold himself out.

Comments to AARP Magazine can be addressed to:
Be assured that as a subscriber, they will hear from me.
08/20/08 @ 18:00
Comment from: funkymuse [Visitor]
Ruthie... I beg your pardon.. but as a sugar addict who has struggled for years with diets and attempting to find my way out, I think your comment is uncalled for regardless of who it is about.

Many people have overeating and food addiction issues. Maybe he has not found his bottom line yet. Hasn't hit the hard times of addiction where the fear of not being able to control your substance abuse finally brings you to your knees. Since he obviously does not give credit to the BTD, I bet you he is struggling with many body issues including fighting body weight.

I won't take his advice but not because he is overweight. I feel that is a rude comment. No we don't like Dr. Weil but when someone carries extra weight there are unseen issues.

Sugar/carb addiction is a huge disease in this country.. one that is finally beginning to be diagnosed seriously from the standpoint of brain chemistry and with Dr. D's research Blood type and Geno Type by Dr. D and many others.

I wish you a more compassionate view of people who are overweight regardless of who they are.
08/21/08 @ 21:53
Comment from: Barbara [Visitor]
Skeptics will always be skeptics. My own family is constantly reminding me that if this diet works, why isn't it more well known. I have been using BTD for two years and don't have the health and weight issues my syblings have, we're all in our 50's yet some how they believe that constantly going back to their "Commercial Dietary Programs" works? I have asked them to give it a whirl and needless to say, they won't. I feel great, look great and that's what counts. You caount argue with a skeptic.
08/22/08 @ 17:52
Comment from: Melissa [Member] Email
Wow, excellent blog. As for his statement that "Making changes in how we eat is not easy. To follow any prescribed dietary program with rules and restrictions represents a significant commitment of mental energy toward self-improvement. That alone can lead to a greater sense of well-being and better health"

I can say that many of us, myself included, made drastic changes in how we ate on other programs, without the results we finally found on BTD/GTD.

Dr. D'Adamo, and those who earnestly follow his diets, are the picture of health. The same cannot be said for Dr. Weil.
08/23/08 @ 15:34
Comment from: Ron [Visitor]

I've found that many skeptics are not really skeptics at all... but, rather, secretly devout followers of some other system, their allegiance to which they conveniently forget to disclose.
08/24/08 @ 03:23
Comment from: carmelle [Visitor] Email
Dr Weil is just one of many sceptics of Dr D'Adamo's research in eating according to your blood type.I, on the other hand,am a staunch believer, and as such, I have been following the blood type 'A' diet for seven full years and have NOT ONCE thought that I should take another look at what I have been eating to stay as healthy as I am today. I am a 60 years young female who decided to take a proactive approach to my health in Feb 2001, by following Dr D'Adamo's eating and health plan and I've never looked back.I have been diagnosed with M.S. since Feb.1981(almost 28 years now.)Our daughter just turned 28 in June this year and I was diagnosed 7 months after she was born.Right now,Erin has just accepted placement at Sunny Brook Hospital in Toronto ON. as a registered dietician.My husband and I are so proud of her. With all that said,Erin is NOT supportive of Dr.D'Adamo's research. I'm ok with her disapproval and she's ok with my acceptance of his diet.She is aware of which foods I eat and sees how I am healthwise and relaxes on the criticism since she sees that I am eating well and my physical and mental health are NOT suffering,SOOOO I should keep up my regiment of blood type diet and THAT I will continue.As far as Dr Weil is concerned,he needs to get more proactive about losing weight don't you think? He really should give Dr D'Adamo's theory and eating plan for his blood type a try.It won't hurt him and who knows, he may even shed a few unwanted pounds.I hope he gives d'Adamo's health plan a try.He won't regret it and will definitely be better for trying this eating plan.By the way,exercise is very important also. THAT needs to be part of the plan. Just for stats purposes only, I am 5'1" and I weigh 92 pounds.I exercise every day for about 1/2 hour. I rebound on a mini trampoline for 15 minutes and I do yoga stretches and core moves on an exercise mat for another 15 to 20 minutes.I use a cane for mobility as well as a walker for long distance walking.Actually I am doing quite well considering that I've had MS for so long and in 2000 I developed pneumonia which was followed by an asthma diagnosis,which I continue to treat on a daily basis.The asthma is under control and I feel GREAT! Thank you for the Blood Type Diet theory.I hope Dr Weil incorporates it for HIS HEALTH too!
08/30/08 @ 22:33
Comment from: Kate Eryn [Visitor]
"I've found that many skeptics are not really skeptics at all... but, rather, secretly devout followers of some other system, their allegiance to which they conveniently forget to disclose." - Ron

Nicely said. When reading Dr. D's blog I couldn't help but think self proclaimed skeptics are misleading, because they choose not to believe before any evidence has been presented.

I was always marginally interested in Dr. Weil, even while reading up on the BTD five years ago. I picked up one of Dr. Weil's books too and found it to be fluffy and pedestrian. 8 weeks to change my health included more breathing exercises and unplugging my TV than sound nutritional advice. I am a carb addict, lol. I get in moods where I'd sell my gramma for a biscuit with butter. I want to understand and redirect, not further anesthetize myself, trading blind submission for blind mastication. Weil says Maybe eat more fish. Why, I wanted to know. Is this some peyote-inspired vision or is there a reason you want me to do XYZ? Two days into Dr. D's book and I forgot all about Dr. Weil. I like facts, and can connect the dots with faith.

On a personal note, I do have to agree with the writer who said she/he would not take health advice from someone who is overweight. I am still overweight by about 40 lbs and I am not offended in the least. I agree with the sentiment. Dr. Weil positions himself as a health expert, yet clearly is not physically healthy. Or spiritually healthy, if you want to get right down to it. He's been unyielding, close minded, ego-centric. Perhaps he should try some more breathing, and turning off the news. The stress he has from focusing negative energy on another humanitarian is cancerous not only to himself, but the world at large. Someone into "alternative" medicine should understand that.

I will not go to a marriage counselor who has never been married, has a broken marriage or dysfunctional one, I will not follow a leader, a God, a politician, any expert on anything who does not walk the walk. If you want to lead me, you have to show me how it works in science and then prove it's worked in real life. Dr. D follows his own regimen and provides more data than even a geek like myself can process.

I believe in yoga breathing when I am having an emotional response or seek a spiritual connection; I believe in the chemistry of blood types when I want to understand and manipulate the bio processes of my metabolism. The right tool for the right job. Well, if the world wanted an easily dismissable tool for the role of Dr. Debunker, they sure found the right one.

Fellow Warrior, A+
09/08/08 @ 08:04
Comment from: LibertyLady [Visitor]
Here is the message I sent to "Dr. Debunker" in response to his criticism of the BTD:

"As a staunch critic of the Blood Type Diet ("This popular eating plan ought to be sacked"), it follows that you must claim expertise in offering such a harsh commentary. I am a 10 year survivor of an aggressive breast cancer and as such my experience with doctors has taught me two very important lessons:

1) In spite of the authoritarian air exuded by many doctors, they are, of necessity, only the products of their medical educations and anecdotal practices. Doctors who are generally dismissive of new theories, especially those who cite a lack of scientific evidence, are usually ignorant of that evidence.

2) In matters of health, I put more trust in experts who appear healthy themselves. Common sense dictates that a true professional follows his own advice. Common sense also dictates that by following his own advice, his physical appearance will manifest the result.

With regards to #1 above, I suggest you visit . This portion of Dr. D'Adamo's website offers an enormous database of the scientific evidence you claim is non-existent.

With regards to #2, please forgive me if your appearance has recently changed, but judging from hundreds of your photos on Google Images, you appear to be about 30 pounds overweight and don't look terribly fit. What incentive does the image you portray give me to follow your advice?

It saddens me to think of the thousands of people you reach through your books, columns, and personal appearances who accept your unsubstantiated opinions as truths."

09/18/08 @ 14:14
Comment from: Frances [Visitor]
I think I once read something about Weil having gained a name for himself in the 1960s while at Harvard by involving himself in some academic manouvers of questionable moral character.

Tell the the truth and don't be intimidated by this guy. The doctors I trust are those with sturdy egos who are willing to LISTEN to people and consider possibilities, who in other words, humbly embrace their humanity and yours.
09/29/08 @ 07:49
Comment from: Chel [Visitor]
I agree with Mo, Andrew Weil has sold out completely and I told him this before I unsubsribed to his little newsletter. He straddles the fence betwixt alternative and conventional meds to obtain the most followers and p#@$ off the least amount of people. His newsletter was nothing but advertising for all of his wonderful products.

When I first subscribed to his "news"letter I naively wrote a note extolling the advantages of the Blood Type way of eating, and someone on his team wrote back a scaling response and said I should not be so all-trusting of the quackery that abounds, (my words). That's when I saw him for what he is, a "Corporate" Medical Advisor. It seemed that he resented the competition for HIS products. With Weil it's all about the Benjamins.
11/10/08 @ 13:15
Comment from: Dr. K [Visitor] Email ·
Dr. D,

Good to see you responding to this.

When I saw that Weil hit bit in AARP ('cause I guess I'm old!) I hoped you would respond. Your refutation of his double standard is right on the mark.

Weil has presented himself to the mainstream press as a sort of founding father of CAM for far too long. Time Magazine aside, he's nothing of the sort, but has never been called out for his exaggerated sense of him self.

At least you would think he'd want to be friendly with his natural allies in a cause he claims. At best, I expect people of wisdom to give a little credit where credit is due (as you've done in your post btw). Instead, he simply arrives at a conclusion and works his way backwards, dismissing anything that comes from outside the closed loop of his own opinion. That's the UNscientific method.

I don't know him, never met him. I do know you. I think the world of you and your work. You always have my best wishes,

11/12/08 @ 00:05
Comment from: shake [Visitor]
I'm just a dumb mechanic who is on the blood group diet, for me it works 100%,
but what concerns me are all these so called Doctors that pop up out of no where with statements like "it has been discovered red wine and coffee are good for you" or "tests show that too much milk has its down sides". They are armed with only half the facts there guns are loaded with some blanks and ill equipped for combat.
Should there not be some sort off world standard that a diet must be rated under.
I was lucky the blood group diet was my first choice, it's not a money making racket but a genuine guide to good health, now what about all those poor people out there that are stuck on diets that don't work or ever make them sick,they all believe a doctor is a doctor and must know what he or she is doing, they are messing with these people's health, there needs be some sort of control.
11/28/08 @ 01:14
Comment from: jane faria [Visitor] ·
If the diet works and it is perfect,why reinvent the wheel? I never felt so good! Do you want more than feeling great? Thank you Doctor for all your hard work.In my opinion you do not have to proove right to anyone, the results speak for itself!
12/27/08 @ 05:34
Comment from: April Holley Commodore [Visitor]
All the thinking lay people out there who assess and decide for self cannot be so easily deceived. I'm one of them! Not long after learning of your research, I searched the internet and came across various medical doctor nay-sayers discrediting blood type eating. I was happy to disregard their comments and try for myself. The results were right on! Thank you so much for sharing the results of your research with the world. Prior to Dr. Weil's comments against your work, I considered him an authority worthy of consideration -- but not now.
12/29/08 @ 14:29
Comment from: Page [Visitor]
How about the recently published studies showing a direct correlation between blood type and pancreatic cancer?
I used to live in Tucson and met several doctors who either trained under Weil or had to work with him, none had flattering comments.
06/08/09 @ 19:29
Comment from: Ffantazsia [Visitor]
From the quotes posted, it seems like he is coming around. I would take the higher road and just keep doing the work you do; defend yourself and your work where you must, but don't play bad politics (making him look foolish, lawsuits, etc. as others have suggested). Ignore him... don't give your power away. You are a healthy, successful doctor who has loyal followers. You hold youself to a higher standard; it is all you need to do.
06/28/09 @ 03:43
Comment from: Isa-Manuela [Visitor]
congratulation, Peter, great blog
times and habits need to be changed, also here in Switzerland, the land all pratiotiones get confronted when not working or accepting the swiss food pyramide....:-(......

facts onto the more lies!!!

all the success I've had with my clients were only about the introduction of BTD.... why should I change and adopt the swiss nutritionel models?? :-)....
Thank you for having tought me and giving a glimps about realities in life.
All my best wishes to you and your family
amicalement yours Isa
09/17/09 @ 05:08
Comment from: Bekki Shining Bearheart [Visitor]
Really enjoyed the blog and the comments, only one thing I would add.

Many family members and friends have seen the progress I have made on this diet over the years. Some have tried it, with great success; some have tried it and fallen off the wagon; some refuse (so far) to try it. In my experience it is more about whether one is willing to put one's health first, even on a trial basis.

Many people are addicted to their comfort foods (not always sugar or wheat-- I know people who would be better off without red meat, but they love it.) I admit that I occasionally am tempted by foods that are not good for me; I know what the outcome will be and don't fool myself into thinking there aren't consequences.

Many people will not even consider the possibility of eating a diet that might require them to limit a food that has emotional meaning to them. I no longer eat as a part of my regular diet a number of things that I grew up with and that equal "family", "love", "comfort", "pleasure". I may eat them once or twice a year at a family gathering. But a lot of people just can't give those things up. They will give you all kinds of "logical" reasons, or cite science, but the fact is they enslaved by their emotional (and sometimes physical) connections to the foods they eat, and it is too scary, or feels too much like deprivation, to change.

I always tell anyone who complains of ill health to try the diet for 2 weeks-- a month if they are really bad off. My attitude is, that it is 2 weeks out of your life. If you don't feel better, you have only invested 2 weeks to find out it doesn't help. If you do, then you can decide if feeling better is worth it. I have found that most people do see a change in 2 weeks and if they really want to feel better they now know how to do it.

If they don't bother to try it, then they don't have a right to complain...
09/17/09 @ 20:40
Comment from: pumpkinhead [Visitor]
I changed my diet in 1999, BTD A and have never in all my life felt so good.
People that stumble around in the dark have to wait untill the light comes on!

09/24/09 @ 06:07
Comment from: Tucson desert bunny [Visitor] Email
Yes, it does take a lot of "emotional energy" to make changes in diet or in life.
Dr. Weil obviously does not want to do that, so he refuses to seek out the truth by examining the evidence. It's much easier to deny something when you don't have the knowledge than to learn of it and then refuse to accept it. This is very common today. That's why most ignorance is self-inflicted. It's because they like their way of life and it requires too much "emotional energy" to make the changes. It's just too bad that he's in a position to influence so many people.
The BTD has been a savior for me. Don't give up your wonderful work Dr. D'Adamo! As the old saying goes, "The proof is in the pudding!" Thank you!
01/23/10 @ 11:30
Comment from: free yoga [Visitor] ·
well written post!!!
02/08/10 @ 11:07
Comment from: loki [Visitor] ·
Don't think that Andrew Weil speaks for the sceptics amongst us. He's just as laughed at as D'Adamo is. If Peter wants a discussion about the pseudo-science of BTD then I'm sure there's many biochemists and biologists ready to put him right. Double blinded experiments in the meantime might be a good place to start anf the many other holes in the presumed correlation between one gene deciding blood type and it's almighty control over the body. even though there's 276 distinct blood types, P D is more than happy to gloss over and pin it down to four. Even though blood types evolved millions of years ago, AB happened 1000 years ago? Come on.

Hello Andy,

Despite your best efforts to be pithy, you really could be a much better skeptic if you stuck to facts by

1.) Consulting a text book on modern immunology. That could have sufficed to alert you that the ABO system is unique in its appearance in non-hematologic tissue, such as the digestive tract.

2.) Learning some basic genetics. AB blood group is an outcome of the presence of two co-dominant alleles, not the result of any evolutionary process.

3.) Talking to a biochemist. I think you'll probably be unpleasantly surprised by the extensive biochemical basis for this theory.

4.) Learn what a word means before you use it. Pseudoscience generally proposes changes in basic scientific laws or reality in order to allow some phenomenon. My humble theory would most certainly fail that test.

5.) Work on your skeptic credentials. I looked at your blog link and -surprise- your other blog is a collection of vegan recipes from around the world. To my mind, vegans just lack street credentials when it comes to skepticism. [1] However, since I'm type A vegetarian I'll probably check them out.

03/10/10 @ 16:21
Comment from: Derick Jones [Visitor] ·
My wife has been following the diet for a while now and she can vouch for you. I too have never seen her fitter and as energetic as she is now. It is amazing. Thank you for all your hard work! Let the skeptics remain skeptics. They don't know what they are missing out on. Great to learn about your blog.God bless you.
06/28/10 @ 08:36

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