Is blood type linked to personality?

there is as much correlation of blood type to personality as there is a connection of horoscope to personality.

in other words, none.

Blood types just are as medical fact. The use of knowing blood types is so that you can give a transfusion to someone that will help them when medically necessary.

There’s a correlation between blood type and various psychiatric diagnoses. So there’s that.

I sincerely doubt it.

My blood type is “be positive”, but the fact is I’m often a negative Nancy.

@Demosthenes, I’m Zero Negative, but usually pretty cheerful. Switched at birth, perhaps?

@raum Really? Have a link by chance, that’s interesting!?

@raum I’m interested too.

Just a few I found:

The study found that the blood group (AB) received the highest average in the Intelligence Quotient (IQ) test which is also the highest in the GPA. And that the blood type (B) was the lowest in the GPA and in test results.

This study aimed to know the relation between the four blood groups (A, B, AB, O) and intelligence for
universities’ students who reached (194420) students and it was tested on (364) students intentionally
distributed to four equal groups; (91) for each group according to their blood group of six Jordanian
Universities, which are:
Jerash University, University of Jordan, Yarmouk University, Philadelphia University, Irbid National
University, and Al-Balqa’ Applied University.
The study found that the blood group (AB) received the highest average in the Intelligence Quotient
(IQ) test which is also the highest in the GPA. And that the blood type (B) was the lowest in the GPA and
in test results. The researcher recommended to expand the circle of the research to include all
Jordanian universities , other universities and schools in a longer periods of time

Blood type may affect brain function as we age, according to a new large, long-term study. People with the rare AB blood type, present in less than 10 percent of the population, have a higher than usual risk of cognitive problems as they age.

People with O blood type may be more likely to have depression and intense anxiety; children may be at a greater risk of attention-deficit disorder.
People with A blood type may be more prone to obsessive-compulsive disorder; children may be at a greater risk of attention-deficit disorder.
Children with B blood type may have a lower risk of attention-deficit disorder.
https://www.scientificamerican.com/article/blood-type-matters-for-brain-health/

Well, yeah, but my blood can go to anybody!
And does. I have slut blood. <sigh>

I know I’m O positive and really bad at handling stress physically. I had a bleeding ulcer in college. That much could be true.

Blood type can also affect the susceptibility to certain conditions that can affect your personality.

Conditions could be asymptotic like toxoplasma gondii.

Meaning that your blood type could put you at a higher risk of contracting this. And even if you had it, you wouldn’t show any symptoms of having it. But it could be altering your Bain structure and personality.

It’s pretty common too. Global rate of infection is 30–50% of the population. And as high as 84% of the population in France.

“There’s a correlation between blood type and various psychiatric diagnoses. So there’s that.”

Perhaps it is only from the ones that took the study or were studied?

What about ones that are not diagnosed yet..would blow the study out of the water..its universal no matter what blood type…I would think.

@Inspired_2write I’m not entirely sure if I understand your objection? Perhaps you misunderstood what I wrote? A correlation is not an absolute.

Take for instance this study on bipolar vs unipolar manic-depression.

While the study found that there was a higher percentage of O blood type among bipolar and a higher percentage of A blood type among unipolar patients, that doesn’t mean that all O blood types will experience bipolar manic depression.

Could you clarify what you meant about how undiagnosed patients would affect these studies?

@raum Unless one studies the whole world , which would take years to compile , then study , then correlate etc It is just a theory.
It is a generalization until ALL are included in this study. A percentage of the population is not credible to announce findings that are in fact generalizations..that is all I was saying.
I object to groups that supposedly cover ALL the entire World.

@Inspired_2write Your objection is that the whole world wasn’t part of one study? I’m legitimately confused.

The correlation between blood type and psychiatric diagnoses is supported by a pretty extensive body of research. It’s not done by any one group. I’m not sure to which group you are referring?

Are you objecting to what I originally wrote? If so, you can easily google for yourself.

“ABO” “blood” “psychiatric” “nih”
“Rh” “blood” “mental health”
“Lewis” “blood” “diagnosis” “nih”

If you’re objecting to the actual research…well. I’m not sure what to say to that?

That’s just science, dude.