Beth - while some people claim that these diets have really helped them, there is very little hard science to support this as very little scientific research has been done to prove the claims in this book.
I got curious about this diet a while ago myself so I did some research on it. I found a saved email I sent to someone about it that included the following quote it from a reputable source (I *think* it was on the web but I can't seem to find it again now...) Anyway, these are some of the criticisms of this diet:
Quote:
Some physicians and nutritionists argue that Dr. D'Adamo's theory about lectins lacks solid scientific support. These critics point out that the research that has been done on lectins has been performed mostly in test tubes. Therefore, it is not yet known what, if any, physiological effects lectins have in humans. Furthermore, many food lectins are destroyed by cooking and/or digestive enzymes, so many critics argue that the number of lectins absorbed intact through the digestive system is minimal. Other critics point out that Dr. D'Adamo's emphasis on the ABO blood-typing system is somewhat arbitrary. In a book review, Alan Gaby, MD, points out that the ABO system is only one of many different blood-typing methods, and to date, more than 30 unique markers have been identified on the surface of red blood cells. Consequently, if Dr. D'Adamo had based his diet on a different marker, his diet recommendations may have been very different.
Most critics believe the diet is associated with no real health hazards. However, critics caution that people with Type O blood may increase their risk of heart disease by adhering to Dr. D'Adamo's Type O diet recommendations.
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Blood type diet...some criticisms...
