In 1996, Peter J. D’Adamo, N.D., a noted naturopathic doctor, scientist, and researcher published Eat Right 4 Your Type, often referred to as The Blood Type Diet, that made the connection between your blood type, your diet, and your health.

This revolutionary concept opened the door to the idea of personalized nutrition – that individuals should eat different foods based on their body’s biochemical make-up.

According to an Authority Nutrition review, their bottom line was that there was not a single well designed study that has been conducted to either confirm or refute the benefits of the blood type diet.

Their “Take Home Message” was there there was no doubt that many people have experienced positive results by following the diet. However, this does not mean that this was in any way related to their blood type.

Different diets work for different people. Some people do well with a lot of plants and little meat (like the type A diet), while others thrive eating plenty of high-protein animal foods (like the type O diet). Here is a breakdown of the recommendations based on your type according to WebMD:

Type O Blood:

A high protein diet heavy on lean meat, poultry, fish, and vegetables, and light on grains, beans, and dairy. It is recommended to incorporate various supplements to help with tummy troubles and other issues that people with type O tend to have.

Type A Blood:

A meat-free diet based on fruits and vegetables, beans and legumes, and whole grains – ideally, organic and fresh. Typically people with type A blood have a sensitive immune system.

Type B Blood:

Avoid corn, wheat, buckwheat, lentils, tomatoes, peanuts, and sesame seeds. Chicken can also be problematic. D’Adamo encourages eating green vegetables, eggs, certain meats, and low-fat dairy.

Type AB Blood:

Foods to focus on include tofu, seafood, dairy, and green vegetables. People with AB blood tend to have low stomach acid. Avoid caffeine, alcohol, and smoked or cured meats.


If you got great results on the blood type diet, then perhaps you simply found a diet that happens to be appropriate for your metabolism. It may not have had anything to do with your blood type.

Also, this diet removes the majority of unhealthy processed foods from people’s diets. Perhaps that is the single biggest reason that it works, without any regard to the different blood types.

That being said, if you went on the blood type diet and it works for you, then by all means keep doing it and don’t let this article dishearten you.


For me personally, years ago I had a study completed through Cell Science Systems called the Alcat Test. The test helped to uncover which foods and other substances that trigger chronic inflammation and its related health issues such as gastrointestinal, metabolic disorders and others.

Interestingly enough, when I started this journey, my personal trainer designed a meal plan based on my macros. I was having gastrointestinal issues and just wasn’t losing as quickly as I thought I should be, especially with the changes in my meal plan that I had made. It triggered a memory of the Alcat Test that I had in 2013, and after contacting Cell Science Systems, they provided me with a copy of my past results, and ironically, the items listed in my “moderate reaction” section matched up with what Dr. D’Adamo suggests in relation to my blood type!

My trainer revised my meal plan where we removed gluten and chicken, and I’ve started to feel so much better.

Bottom line – There may be some “trial and error” until you find what works for you, but whichever route you choose to go, make it a lifestyle change, a mindset to healthier living.