The GenoType Diet: Complete Review
Nutritional Genomics is the future of nutritional science. In time, we will be able to take the guesswork out of which foods/nutrients will work best for individuals under virtually any circumstance. The GenoType Diet, by Dr. Peter D'adamo, suggests that eating based on our genetic make-up is the key to optimal health, fat loss and other desirable attributes.
So is this book a revolutionary take on individualized nutrition or a flawed attempt at creating something unique? Let's explore.
One of the most formidable flaws of today's diet book is the one-size-fits all mentality. Ie. diet X is the best/only/easiest/all of the above diet for everyone... all the time. Hence, it is refreshing to see a diet book that makes an attempt to customize eating plans based on a factor that is central to our being - our genetics. On the flipside, this is the "Blood-Type guy". Eat Right for your Type scored big with the book-buying public but drew the ire of academics for its lousy science. Regardless, this is a different book and I was determined to approach it with the utmost of objectivity.
Dr. D'adamo paints a very easy-to-understand and yet very clever explanation on our genetic make-up works and how/to what degree we can alter/change it. He compares our genetic codes to a town meeting, whereby we have the capacity to turn up the volume on good genes and silence the bad ones.
Here's how it works:
There are 6 different geno-types, each one outlining characteristics such as; body type, traits, strengths, weaknesses and disease predispositions. They are as follows:
- GenoType 1: The Hunter
Tall, thin, and intense, with an overabundance of adrenaline and a fierce, nervous energy that winds down with age. Hunters have swift immune systems which is great on one hand but makes them prone to auto-immune disorders on the other. - GenoType 2: The Gatherer
Full-figured, even when not overweight, the Gatherer struggles with body image in a culture where thin is "in." With a "Whoever dies with the most wins" motto, Gatherers have thrifty genes whose primary goal is to hang on to every ingested calorie for dear life -- literally. - GenoType 3: The Teacher
Strong, sinewy, and stable, with great chemical synchronicity and stamina, the Teacher is built for longevity -- given the right diet and lifestyle. The Teacher represents the third basic response to a challenging world: altruism. "All you need is love" is the Teachers' motto, and their immune systems reflect it. Teachers are able to tolerate a wide variety of unfamiliar bacteria, viruses, and microbes, avoiding the hair-trigger symptoms. Unfortunately, they sometimes welcome infectious elements that they would do better to repel. - GenoType 4: The Explorer
Muscular and adventurous, the Explorer is a biological problem solver, with an impressive ability to adapt to environmental changes and a better-than-average capacity for gene repair. They are good at adapting to different conditions but are vulnerable to hormonal imbalances. - GenoType 5: The Warrior
Long, lean, and healthy in youth, the Warrior is subject to bodily rebellion in midlife. If Warriors are physically active, their metabolism burns hot; when they lead a sedentary life, they tend to put on the pounds with alarming speed. - GenoType 6: The Nomad
A GenoType of extremes, with a great sensitivity to environmental conditions -- especially changes in altitude and barometric pressure -- the Nomad is vulnerable to neuromuscular and immune problems. Yet a well-conditioned Nomad has the enviable gift of the ability to control caloric intake and age gracefully.
There are a series of evaluations/questionnaires offered to help determine which type you are. For each type, there is a description of disease susceptibilities, a metabolic profile, an immune system profile and do's and don'ts.
Evidence?
If that old bird from the Wendy's commercials were still around, she would probably ask "WHERE'S THE SCIENCE?" It would seem logical that we would be evolutionarily geared towards certain diets. It would also seem logical to assume that we can make the most of our genetic potential by eating the right way. In this sense, I agree with the global concept that we can counter genetic predispositions through proper eating. The specifics of the diet however are puzzling.
It just doesn't jibe with me that my blood type, the shape of my head or the length of my index finger in relation to my ring finger (some of the traits that determine our geno-types) would be sufficient enough data to determine whether certain foods are toxic or healthy.
As an example, according to my profile I am Hunter. In my list of foods, Atlantic salmon is considered toxic to me, while Chinook salmon is a superfood. Huh? I was also devastated to learn that kangaroo and opossum are to be avoided for my type.
The problem with me attempting to rubbish the concept, however is that I am neither a geneticist, an anthropologist a nutritionist or an anthronutritionalgeneticist (I don't think such a title exists, but hey it sounds cool). So rather than speculate, I asked an expert on the subject of Nutritional Genomics. The professor (who asked to remain anonymous) told me that he is not aware of any such evidence to support D'Adamo's claims.
Another red flag is that D'Adamo did not include any journal references and there are none to be found on his website. This leaves me to conclude that he has presented interesting but unproven ideas.
Overall Impression
It's a bit of a task to get through the book and to fully understand the principles (at least for me it was). I think it gives a wonderful overview of the relationship between our genes our pre-natal environment, our bodies and our environment.
The idea of eating for your own personal genetic code is going to have a bright future when it comes to nutritional science. I don't think this particular concept is it though. Too many questions still abound about the specifics of his suggestions. There aren't enough scientific rationalizations to be able to make such specific food selections - at least not any that I know of.
Also, this book is a bit like the last episode of the Sopranos. I was left thinking "That's it? That's how it ends? There were no meal plans, recipes or specific guidelines. I later figured out that you have to go to the website and pay for that information.
The Verdict
It wouldn't hurt to give it a try just for something different - the guidelines are pretty sensible regardless of the geno-type. Just don't put too much credence in the science behind it.


Im intrigued enough to want to read this yet, when reading the types above, think:
which one am I? would I be were I not working daily to be healthy and stay fit?
Kind of like the somatypes. People often tell me Im an ectomorph or mesomorph but, if I ate junk and sat on my arse more than I do now, Id be an endomorph.
or would I?
hard to know---but looks like something Id wanna read hard science behind or not.
THANKS FOR THE REVIEW as Id not even heard of the book.
ReplyThis is a great review - I'd looked into the online diet but never seen the book version, so this sheds a lot of light on the principles of the Genotype Diet. Does D'Adamo state any of his own research as back-up for his plan? Sometimes I wonder where an author comes up with their ideas for a book and/or diet like this. If there really is no science to back it up, does that mean people are willing to buy the next-best-thing whether or not it's proven to work?
ReplyI've not read this book, but from a marketing point of view - people love new taxonomies that place someone into a somewhat flattering category. You get a new identity, and probably meaningless insight that gives an afterglow of understanding...
ReplyI never fit into any of the categories in these sorts of books, and I hate the idea that we all fit neatly into boxes. Even if there were those "genotypes" once, thousands of years of intermarriage make the idea that we all fit neatly into these categories ridiculous.
ReplyI find this very interesting. I did not know there was much of a relationship between nutrition and genetics, but it does make sense. It's incredible what studies have shown in terms of how our genetic makeup effects our health in terms of diseases. Hopefully, this type of thing can help improve overall nutrition and health in the future.
ReplyIf he's not presenting his theories for other scientists to analyse and respond to, then it's not science. Science progresses via group effort.
Just because some multiple-choice test manages to sort people into x number of groups, doesn't mean that there are actually x groups to divide people among, or that these specific groups represent anything real.
What I am reading from Mike's review:
(1) pay Dr. Peter D'adamo money via buying his book.
(2) take test that he made up and no other scientist will vouch for.
(3) pay him money via his website to be able to put his ideas to use.
Sounds fishy to me (chinook or atlantic salmon, take your pick).
ReplyAs an aside, the test is actually available for free via the Genotype website, but once you take the test, you have to buy his book to find out what kind of "eating solutions" he has for your particular genome.
So, reverse #2 & #1 as follows:
1. Suck readers in by allowing them to take test for free, but giving them no further info.
2. Pay Dr. D. $$ by purchasing his book, which is backed by no other scientists.
He provides quite the effective "hook", no matter what kind of fish you are.
ReplyI am not a fan of any book that doesn't provide either research or actual exercises that you can try or work on that involves your health. The fact that you have to pay to get any of the information that you can use to apply the diet is ridiculous.
ReplyAre people just smoking pot, writing stream of conscious, and getting book deals?
How does this get published?
ReplyIt sounds like complete junk. It doesn't even pass the smell test and is not worth further investigation.
As you rightly note, it appears at first to rest on a logical premise: that humans have evolved in ways that will make certain diets better or worse for them. It then makes a gigantic leap to making specific claims about what diets are better for certain supposed "genotypes." There is no science supporting these claims. If there were, we would already know about it.
ReplyThis book sounds sort of fishy to me. The descriptions of the different "GenoTypes" are kind of vague...I could be in either the Teacher or the Explorer category while my husband is probably a Warrior. If this book is like the Blood Type book, there are lists of foods that you can and cannot eat, so that's mostly what's going to lead to any sort of weight loss. If you can't eat X, Y, Z and are allowed to eat Q, R, and S, of course you'll probably lose some weight.
I'm sort of curious to see what else is in this book, so I may have to check it out to see what foods I "should" be eating.
I'm betting the next book this guy publishes will be the Zodiac Diet...if you're a Virgo, you should eat fish and beans but if you're a Libra, you should eat beef and quinoa or whatever. I'm sure people would buy it.
ReplyI briefly skimmed through that book in the store around x'mas. It involves a LONG test to determine your type. I find this still a one size fits all approach. Not everyone fits into the type exactly, just like someone mentioned, sort of life sameotype(sp.).
ReplyGreat review of the diet. I for one do not believe the hype of most diet books. I think regardless what your genetics are, if you choose a healthy diet and exercise regularly you can lose weight and be healthier. Books like the Geno Diet, really don't care about the health or weight of the "customers", they just care about the bottom line - the money in their pocketbook.
ReplyI find that the first sign that a so called ‘scientific’ theory has little actual scientific merit is when it does not use correct terminology. ‘Genotype’ is a real term but refers to the actual combination of genes that result in a specific phenotype. For example, the genotype for O blood type is (i,i). You won’t sell any books with that.
ReplyGenotype Diet is the good for health.I did not read the book but according to the action point of view Genotype diet is good diet that suits for the body.
ReplyI think it is an interesting notion but when you break it down I think it is a pretty crazy idea. We have not been hunter or gathers for thousands of years. If we all had these specific gean types they surely would have been cross bred so many times over the last few thousand years there would no longer be any distinct subsets. It sounds a bit far fetched and the fact there is no supporting evidence makes the claims very week.
ReplyDon't knock the book or its concepts til you've read and understand them...the science behind d'adamo's books is certainly there...unfortunately, those who've never read d'adamo's books pass his work off as rubbish because of their ignorance
The term, 'genotype,' is indeed used appropriately, as the premise of the book is how specific factors (e.g. nutrients, diet, and lifestyle) effect one's genes (genotype), thereby altering the expression of those genes (observably, phenotype). Naturally, different gene expressions (e.g. as a result of silencing, RNA interference, et cetera) and different genes themselves require different diets and lifestyles; d'adamo is simply trying to develop diets and lifestyles that promote the optimal expression of one's genes, which ultimately leads to better health.
ReplyUh, based on the tone of this book, I'm not really sure this "Dr. D'Adamo" who wrote it really knows a whole lot about gene silencing and protein synthesis, etc. I'm guessing that's why the name of the book is the "GenoType Diet" when he clearly doesn't base it on actual genotypes.
ReplyIt just feels like D'adamo is flogging a dead horse with the Genotype Diet, which is suffering the same negative press that his Blood Type Diet
received, and for all the same reasons.
If you go ahead and spend your hard earned money to gain access to the recipes and other tools for this diet (which is $4 a week, but you have to pay for 13 weeks, so actually it is a $52 investment, plus the cost of the book too) you find that the recipes are quite good. But again, if it is recipes you want then save some money and just buy a good low-carb, low-cal cook book and start cooking.
ReplyI have the book and like it alot. It said that we could go on the website to find a list of all the foods tested and newly discovered foods for our genotype to eat and to limit or avoid but I cant find this information. Can someone send me it please? Thankyou
ReplyWhere do I find list of foods tested and new ones to eat and those to limit or avoid?Help!
ReplyI ended up retyping my food list right from the book for my type, eliminating foods I don't normally eat. Hope this helps!
Reply