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The Blood Type Diet was developed by Dr. D’Adamo who published the book ‘Eat right for you Type’ and became a popular diet book around the world. This diet suggests that depending on your blood type (O, A, B, AB), you’re body metabolizes certain foods better than others and can guide your dietary needs. Specific foods should be included or avoided depending on your blood type to maintain optimized digestive function, resistance to stress, overall energy, mental clarity and well-being.
Lectins are an important factor in the Blood Type diet as they are thought to react differently with each blood type. Lectins are sugar binding proteins found everywhere in nature. In our bodies, they serve many purposes from the regulation of cell adhesion to glycoprotein synthesis, control of protein levels in the blood as well as playing a role in the immune system. Lectins are also found in the foods we eat and are found in high levels in beans, cereal grains, seeds, and nuts. An excess of lectins in the diet can lead to immune responses, gastrointestinal problems and possibly plays a role in obesity through causing resistance to leptin, the hormone responsible for signaling fullness.
Dr. D’Adamo makes certain specific claims such as "...certain beans and legumes, especially lentils and kidney beans, contain lectins that deposit in your muscle tissues, making them more alkaline and less charged for physical activity." (p.53) and "Type O's do not tolerate whole wheat products at all," (p.63). It is the difference in reaction to these lectins found in our diet based on our blood type that forms the main argument for the Blood Type diet guidelines.
Blood Type O should follow a low-carbohydrate, high in protein (such as meat and fish), and low in dairy product intake diet. Blood Type A should avoid red meat, eat plenty of fish and vegetables, with a low dairy intake. Light exercise only. Blood Type B should avoid chicken and bacon, eat plenty of meat and dairy, some fish, and plenty of fruit and vegetables. Blood Type AB combines the A and B diets.
For more detailed explanations and guidelines for each blood type, check out the ‘How It Works?’ section
How It Works
First, you need to know what blood type you are. A simple blood test can tell you what type you are.
- Blood group O is said to be the hunter, the earliest human blood group. The diet recommends that this blood group eat a higher protein diet. D'Adamo bases this on the belief that O blood type was the first blood type, originating 30,000 years ago. The O diet is low-carbohydrate, high in proteins (such as meat and fish), and low in dairy products. Some specific foods to avoid for O bloods include; avocados, brazil nuts, and oranges. Type O should also engage in lots of exercise.
- Blood group A is called the agrarian or cultivator by D'Adamo, who believes it to be a more recently evolved blood type, dating back from the dawn of agriculture, 20,000 years ago. The diet recommends that individuals of blood group A eat a diet emphasizing vegetables and free of red meat, a more vegetarian food intake.
- Blood group B is, according to D'Adamo, the nomad, associated with a strong immune system and a flexible digestive system. The blood type diet claims that people of blood type B are the only ones who can thrive on dairy products and estimates blood type B arrived 10,000 years ago.
- Blood group AB, according to D'Adamo, the enigma, the most recently evolved type, arriving less than 1,000 years ago. In terms of dietary needs, his blood type diet treats this group as an intermediate between blood types A and B.
For more extensive guidelines on what type of diet for your blood type as well as life style suggestions, more information can be found at: http://www.dadamo.com/
For an easy to follow chart of food guidelines: http://www.drlam.com/bloodtypediet/
Dr. Michael Lam, M.D. "Blood type diet" Dr.Lam. Body. Mind. Nutrition. July 12, 2011. http://www.drlam.com/bloodtypediet/
Eat Right For Your Type. "Eat Right for Your Type. The official website for Dr. Peter D'Adamo and the Blood Type Diet" January 1, 2011. http://www.dadamo.com/
Everydiet.org. "Blood Type Diet" Everydiet.org July 11, 2011. http://www.everydiet.org/diet/blood-type-diet
Michael Klaper, M.D. "The "Blood Type Diet": Fact or Fiction?" Veg.ca Toronto Vegetarian Association. November 11, 2005. http://www.veg.ca/content/view/128/110/
T Jönsson, S Olsson, B Ahrén , T C Bøg-Hansen, A Dole and S Lindeberg (2005). "Agrarian diet and diseases of affluence – Do evolutionary novel dietary lectins cause leptin resistance?". BioMed Central Ltd.. doi:10.1186/1472-6823-5-10.
Wikipedia. The Free Encyclopedia. "Blood Type Diet." Wikipedia. July 1, 2011. http://en.wikipedia.org/wiki/Bloodtypediet