Due to lots of support from the entertainment industry, the blood type diet by Dr. Peter D'Adamo has become very successful. The question is how successful the diet really is and he himself on his websites admits to only about 75% success rate. One thing I have noticed from the very beginning is that there was a complete lack of the rh factor when taking into consideration what a person should eat.

Now he seems to have updated his site and I have found this by one of his writers:

In the Rhesus blood group the main antigens are C, D, E, c and e (capital letters and lower case letters are different antigens). The Rhesus antigens come from two adjacent gene loci, the RHD gene which encodes the D antigen and the RHCE gene which encodes both the C and E antigens. There is no d antigen: Rhesus "d" signifies the absence of the D antigen (the RHD gene is usually non-functional or null), and that person is described as Rhesus (D) negative. Similar to non-secretor status, Rhesus negative is traditionally a "recessive" phenotype, which means in practice that if an individual has no functional Rhesus (D) genes, they are classed as Rhesus negative, but inheriting at least one Rhesus (D) gene will give that person the Rhesus (D) positive phenotype. The Rhesus negative phenotype is generally less common than Rhesus positive. Unlike the ABO blood group antigens, the resulting Rhesus blood group antigen is limited to the red blood cells.

Rhesus D incompatibility is best known as the main cause of newborn fatal blood reactions in the children of Rhesus negative women. Lesser known associations with the Rhesus blood group system are Natural Killer Cell (immune system) activity, transport of ammonia in the kidney and susceptibility to urinary tract tumours, myasthenia gravis, ovarian cysts and tumours, and spinal osteochondrosis. Offspring of a Rhesus positive mother may be more prone to hearing loss.

The question of Rhesus blood group significance is often asked in relation to the Blood Group Diet, but the Rhesus factor takes on a new and greater significance with The GenoType Diet: Rhesus negative phenotype can make a difference to individuals in both systems.

In Live Right 4 Your Type, individuals with Rhesus negative phenotype will find that there are specific recommendations for frequency of eating certain food groups: fewer portions of grain (blood groups A, B and O), fruit (blood group A), and more protein (blood groups B and O).

For an individual's GenoType, being Rhesus negative can mean the difference between being one GenoType or another. The GT4 Explorer is often Rhesus negative, which can change the entire diet and lifestyle advice for that individual.

Source: http://www.dadamo.com/B2blogs/blogs/index.php/2008/05/13/rhesus-factor?blog=14

Here is another take on the rh negative diet suggestions:

Biotype Rh-negative is a Basque biotype. This type has inherited a Basque gene for blood type Rh-negative from ancient ancestors in the Pyrenees Mountains of France and Spain. Their ancestors adapted to their specific ecosystem over long periods of time in isolation, and modern Rh-negatives have inherited those adaptations. They fare best with a temperate hunter-gatherer diet of Western European foods, such as meats, poultry, seafood, roots, tubers, and European fruits and vegetables, nuts and seeds.

The Biotype Research shows that blood type Rh-negative has more IgE allergies than Rh-positive. In fact, Rh-neg has the highest rate of immediate allergies of all blood types. The graph at right is an example. This biotype especially reacts to nuts and beans, but also to eggs, some meats, gluten grains and nightshades, as shown below. Their worst allergen is peanuts, a native American food. IgE Scores of 500-750 are mild, 750-1000 are moderate, and 1000-1250 denote strong allergies. Blood type Rh-negative also displays delayed allergies, including: strong IgG allergens, and some T-cell allergens. (Not shown.) For more on this type, see the Biotype Diets book.

Source: http://www.biotype.net/diets/rhnegative.htm

Yet another article warns about food allergies:

Dr. Powers' findings regarding IgE reflect the fact that individuals with Rh negative blood are more likely to have true food allergies. According to Medline Plus, true food allergies, in which the body produces an immune response against molecules in certain foods, are relatively rare--they affect less than 1 percent of the American population. The production of IgE antibodies in particular are responsible for primary food allergy symptoms. Rh negative blood types had the most severe response to peanuts, suggesting a propensity for peanut allergy. Rh factor negative is also hypersensitive to beans.

Read more: http://www.livestrong.com/article/294168-a-diet-for-rh-negative/#ixzz28qYiiVAd

O Negative Diet - A Negative Diet - B Negative Diet - AB Negative Diet