How Blood Type O Affects Your Personality and Life


How Blood Type O Affects Your Personality and Life

What makes blood type O so unique?

Karl Landsteiner was the first one to classify the human blood into 4 well-known types in the first decade of the 1900s by Karl Landsteiner, an Austrian physician. There are four different blood types: A, B, O, and AB. Each of the types differs from others based on the antigens present on the surface of red blood cells and A and B antibodies in the plasma. These antigens explain the effectiveness of your immune system.

Type O blood is unique because it has neither A nor B antigens in the red blood cells but has both A and B antibodies in the plasma. Type O+ is the most common blood type  and is found in 37% — 53% of people in different ethnic and racial groups. Do you know around 43% of Americans are type O?

It’s important to know one’s blood type for emergency situations, like donating your blood to save a person’s life. However, blood characteristics are also interesting determinants of your health, fortune, and personality as well.

In 1930, Japanese professor Tokeji Furukawa identified from his study that each blood type reflects the personality of a person who possessed it. This led to the popularity of the term “Ketsueki-gata”, which refers to personality analysis based on the blood type of a person.

This post focuses on the Blood type O, which is the primal type of our ancestors who were cunning, aggressive predators. Some popular people with this blood typ are Gerald Ford, Mikhail Gorbachev, John Gotti, Crystal Kay, Queen Elizabeth II, John Lennon, Paul Newman, Elvis Presley, and Ronald Reagan.

Related: Find out What Your Blood Type Reveals About Your Personality

Read on to know how this blood type can influence your life.

Universal donors

If you are O+ blood you can donate your blood to all 4 groups, but only to people with the RH positive subgroup (O+, A+, B+, AB+). O- type is a universal blood type that is always needed for emergency blood transfusions. Type O- blood is useful in saving the life of a patient before the crossmatch test is completed. Even when O- blood is in short supply, it can be substituted with O+ blood.

Also, O- blood is considered to be the safest for newborn babies whose immune systems are weak. But, O+ blood type people can receive blood from people with both O+ and O- types. On the other hand, O- blood type people can only receive the same O- type blood.

You have got power to save lives!

Personality traits

In Japan, the influence of blood type on people’s traits and character is so popular that it is used for crafting blood type horoscopes and romantic compatibility charts. That’s not all, Japanese video games mention characters’ blood types.

The Japanese believe that O blood type people are very passionate, generous, and friendly. They tend to be loners or leaders and are intuitive, focused, self-reliant and daring. They prefer to live in a peaceful or friendly environment. However, when they are under stress they may become angry, hyperactive, and impulsive. 

Related: The Four Temperaments Test: What Is Your Four Temperaments Personality Type?

Stress can be caused by excessive anger and hyperactivity. People with this blood type are more vulnerable to destructive behavior when they are overly tired, depressed, or bored. This can include gambling, seeking excitement, risk-taking, and impulsivity.

Influence on work

In Japan, this blood type has long been associated with a particular type of personality. Japanese people are often asked about their blood type when interviewing for a job! People with blood type are most often described as a responsible, committed, organized, focused, conscientious, and practical.

It is believed that they can orient better and they are better logicians. That’s because their ancestors were hunters who had to observe and accurately evaluate the environment, in order to be able to survive.

They are known to play important roles in any society, even to this day. The leadership, proactivity, energy, good communication skills, and ability to stay focused are among the best qualities of people with O blood group.

They can be outgoing, sociable, powerful, financially successful, and productive for themselves and society. They are creative and popular and love to be the center of attention and appear very self-confident. They always make a good impression on people. 

Related: Understanding Type A Personality And Type B Personality


Poor diet, lack of exercise, unhealthy habits, or elevated stress levels, are making O blood group people more sensitive to adverse metabolic effects, including insulin resistance, low activity of the thyroid gland, and obesity.

Related: How a Keto Diet Can Improve Your Physical and Mental Health

Caffeine and alcohol need to be avoided. Caffeine can be particularly harmful because of raising the adrenaline and nor-adrenaline levels, which are already high in people with this blood type. Regular physical activity is required 3 to 4 times a week.

Influence on health 

According to scientists, a blood type can make a person prone to certain illnesses. People with blood type O are predisposed to some health issues like ulcers, thyroid gland dysfunction, low hormone level on the thyroid gland, and iodine deficiency. This causes a lot of unwanted effects like obesity, water retention, and even tumors.

Related: Blood Type Personality: How Do You React In Different Situations According to Your Blood Type

According to some studies, blood type O individuals have a 35% higher incidence of duodenal ulcers compared to people with A, B, and AB types. They also have higher levels of stomach acid than other blood types, often resulting in stomach irritation and stomach ulcers. They are also susceptible to bacterial and viral infections than other blood groups, including severe ones like plague, cholera, mumps, and tuberculosis. 

Health benefits:

People with type O blood have the lowest risk of developing coronary heart disease and cognitive disorders compared to people with other blood types. Studies show that non-O blood type individuals have a 25% higher risk of developing pancreatic cancer than people with O blood type.

Enjoyed reading? Share your thoughts in comments.

Blood Type O
How Blood Type O Affects Your Personality and Life Pin
How Blood Type O Affects Your Personality and Life

12 responses to “How Blood Type O Affects Your Personality and Life”

  1. Davis Avatar

    wow, I am glad I found this article. very eye opening

  2. Khin Gyi Avatar

    Maybe o types are leaders

  3. Daniela Köninger-Miller Avatar

    Maybe it ist just generalization. … but in my regression therapys I had people with type 0 with lots of past live memorys. … and i am Type 0 negative…. and i remember…. I believe, we are so old…………….

  4. Janine Stranger Avatar

    must be true… it’s on the interwebby

  5. Raven Dodson Avatar

    too bad they did a bad portrait (coming from a type O native lol)

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