The Blood Type Diet was developed by Dr. Peter J. D’Adamo, the author of the bestsellers “Eat Right for Your Type” and “Live Right for Your Type”. The diet is based on the principle that chemical reactions occur between the foods you eat and your blood type. According to D’Adamo, if you follow a diet designed for your blood group, your body will digest food more efficiently, you’ll lose weight, have more energy, and have a better general health.
According to D’Adamo, the blood type O diet is beneficial for people with O plosive blood type as well as people with O negative blood type. Because blood type O is the most common blood type, I am going to look at the Blood Type O Diet and discuss what foods you should eat and what you should definitely avoid.
WHAT EXACTLY IS BLOOD TYPE O?
Your blood group is identified by antigens and antibodies in the blood.
Antibodies are part of your body’s natural defenses against invading substances such as germs. Antibodies recognize anything foreign in your body and alert your immune system to destroy it.
Antigens are protein molecules found on the surface of red blood cells.
Blood group O has no antigens, but both anti-A and anti-B antibodies. As group O red blood cells don’t have any A or B antigens, it can safely be given to any other blood type group (A, B, AB).
WHAT IS THE DIFFERENCE BETWEEN O POSITIVE AND O NEGATIVE BLOOD TYPE?
Red blood cells sometimes have another antigen, a protein known as the RhD antigen. If this is present, your blood group is RhD positive. If it’s absent, your blood group is RhD negative.
A person with blood type O can have either O positive (O+) blood type or O negative (O-) blood type.2The blood type O positive contains the RhD antigen but the blood type O negative doesn’t contain the Rhd antigen.3 The majority of people have O positive blood type.
WHAT IS THE BLOOD TYPE O DIET?
According to Dr. D’Adamo, people with blood type O have more stomach acid which makes it easier to digest meals that contain protein and fat. Therefore, a blood type O diet contains more protein sources like red meat, poultry and fish.
However, a person with blood type O should limit their intake of grains, beans, and legumes and definitely avoid wheat and certain leafy vegetables. The reason for this is due to a compound called lectins.5
Lectins help your immune system to fight disease. However, according to Dr. D’Adamo, if you eat food containing lectins that are incompatible with your blood type, this can cause inflammation in the body and make the immune system become overactive, which can lead to autoimmune diseases.4
It has to be said that the blood type diet is not without its critics, and not all doctors agree with the health benefits of the Blood Type Diet. At the end of this article, I will discuss what some of the critics have had to say, and look at the evidence that Dr. D’Adamo has presented to refute their claims.
Let’s look at the best and worst foods for people with blood type O (O positive or O negative).
WHAT TO EAT AND WHAT NOT TO EAT ON THE BLOOD TYPE O DIET
People in the O blood group should follow a strict diet of certain foods. This means that it’s important to know what foods you can definitely eat and what foods are strictly off limits on the blood type O diet.