Should Blood Groups Determine What You Eat?

Does your blood group play any role in your diet? More specifically, is there a relationship between your blood group and what you should or shouldn’t be eating? This is one area that has seen a lot of debate over the years. Some physicians and nutritionists believe that it isn’t necessary to go on a diet based on your blood group, whiles others claim that blood grouping plays an important role in choosing what to eat.

Dr Peter J. D’Adamo, a naturopathic doctor, in his book ‘Eat Right For Your Type‘ explains that there are some substances present on the surface of foods called lectins. These lectins react differently to each blood group, and based on the kind of reaction and severity, the body can respond negatively and this can result in many health complications including constipation, ulcer, stomach upset, intestinal parasites and nervous problems. Dr D’Adamo also believes that based on our blood groups, we have different body chemistries which plays a big role in determining which foods we are able to digest optimally.

Apart from diet, he notes that the kind of exercise most suitable to individuals, and even our responses to stress are all based on our blood type. People with health conditions associated with diet, like allergies and gastrointestinal problems usually observe better health once they start adhering to the diet.

Dr Pauline Zitolina, also states in her book, Alchemy of the Blood Group “A” ,that the blood plays a major role in proper metabolism, and it’s therefore important to know your blood group and eat accordingly. She goes on to explain that, blood transports nutrients to all parts of the body and assists in proper removal of body wastes such as carbon dioxide. Blood also plays an important role in fighting infections if the body’s glutathione (immune globulin) are improved through proper diet. There are three categories of blood cells; Red blood cells, White blood cells and platelets.

Red blood cells carry oxygen to various parts of our bodies and takes away carbon dioxide. White blood cells fight diseases and infections, some seek out and attack foreign invaders (bacteria) while others release antibodies to help remove and prevent specific types of diseases. In some cases, the white blood cells attack their own bodies, this is referred to as autoimmune disease which is often at times related to blood group ‘B’ due to bad choices of food that form molecules of free radicals  in their already heavy and weak blood cells. Platelets reduce help reduce blood clots.

She further states that, for example, cinnamon and nutmeg are dangerous for blood group ‘O’. They can cause palpitation. Nutmeg hallucinates and causes imbalance of the central nervous system. After a plate of food, if you develop gripping pains in your heart and incessant heartbeat, this signifies that the oil you used does not match your blood group because some refined oils become rancid when they undergo the process of frying, they congeal in the blood and block nerve synapses and makes it impossible for the heart to beat properly. Olive oil is the best oil for all blood types because it does not undergo any chemical reaction after heating and it also nourishes the heart and nerves.

She goes on to give some advice: eat plenty pawpaw if you are blood group ‘B’, kiwi if you are blood group ‘A’ and Fig if you are blood group ‘O’. These are alkaline-based fruits for proper pH balance of your body.

If you are blood group ‘B’, abstain from Lycopene and Cyanide products. They are very dangerous to the plasma  and can cause clots. Examples of such foods are; Tomatoes, Chicken, Soya bean, Raw Cassava, Corn and many others.



  • Danish scientists have identified a link between those with AB blood type and deep vein thrombosis (DVT). DVTs are blood clots in the lower legs that can be life threatening if they break free and travel to the heart or lungs. Those with A or B type blood are at a slightly higher risk.
  • The risk of coronary heart disease may also be linked to blood types. And AB was found to have a much higher risk than O, A and B were both slightly higher than O.
  • If you’re having trouble getting pregnant, you should start with blood typing. Studies have shown that those with type O may have fewer viable eggs than other blood types.
  • Blood typing is important to consider when donating or receiving blood because some types aren’t compatible. In an emergency, knowing your blood type can mean the difference between life and death.  If your type is extremely rare, you might consider banking some of your own blood for emergencies.


Even though there is not so much research to prove the works of people like Dr D’Adamo and Dr Zitolina, the fact remains that many people who decide to eat according to their blood groups see a lot of improvement in their health conditions and mostly general well-being. Whenever you eat, listen to your body, you’ll realize that there are some foods that give you indications of indigestion and other signs. You can also grab a copy of Dr D’Adamo’s ”Eat Right for your Type’‘ and learn all about how your blood group affects your diet.

If you have any questions, please leave a comment below and I will get back to you as soon as I can. I would love to have your feedback too, let me know what you think about the post. Also share via the buttons below to create the awareness.

Stay Healthy,


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