No, there is no strong scientific evidence that blood type directly affects personality, though the belief (Ketsueki-gata) is popular in some cultures, especially Japan, as a fun cultural concept similar to astrology, despite studies showing no significant links. Personality is shaped by genetics, environment, and experiences, and while some theories suggest subtle biological links to traits, the widespread personality stereotypes lack scientific backing.
Although there is no proven correlation between blood type and personality, many matchmaking services use it.
From Blood to Brain
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.
Of the eight main blood types, people with Type O have the lowest risk for heart attacks and blood clots in the legs and lungs. This may be because people with other blood types have higher levels of certain clotting factors, which are proteins that cause blood to coagulate (solidify).
IQ scores were fairly similar across blood groups. The highest mean IQ was observed in group AB (104.2 ± 7.8), while the lowest was in group B (100.8 ± 9.1). The other groups, A and O, had mean IQ scores of 102.4 ± 8.5 and 101.5 ± 8.3 respectively.
Some studies reported that the AB blood type was correlated with higher levels of anxiety and cognitive impairment. Another study found that individuals with bipolar or unipolar affective disorder had a higher prevalence of type O blood and a significantly lower rate of type A blood.
While the Bible doesn't mention Jesus's blood type, scientific analysis of relics linked to him, like the Shroud of Turin and Eucharistic miracle samples, consistently shows Type AB blood, a rare type, leading some to believe it's a miraculous sign, though skeptics point to potential bacterial contamination.
According to the American Heart Association, A, B, and AB blood types are associated with a greater risk of heart attack due to coronary artery disease than type O blood. In particular, people with AB blood appear to have the highest risk.
Blood type B is found in a much higher percentage (four times as often) in self-made millionaires than in the rest of the population.
Some studies have suggested that there may be a slightly higher prevalence of autism among individuals with RH-negative blood type compared to those with RH-positive blood type. However, it is important to note that these findings are not conclusive, and further research is needed to establish a definitive connection.
Early vitamin D deficiency increases risk of ADHD, schizophrenia and autism.
The ADHD "30% Rule" is a guideline suggesting that executive functions (like self-regulation, planning, and emotional control) in people with ADHD develop about 30% slower than in neurotypical individuals, meaning a 10-year-old might function more like a 7-year-old in these areas, requiring adjusted expectations for maturity, task management, and behavior. It's a tool for caregivers and adults with ADHD to set realistic goals, not a strict scientific law, helping to reduce frustration by matching demands to the person's actual developmental level (executive age) rather than just their chronological age.
Three studies have reported an association between extraversion and blood type. Lester and Gatto (1987) found that those with blood types O and AB had significantly higher extraversion scores, while blood type A and B individuals had significantly higher introversion scores.
An AB personality's negative traits can include being self-centered, irresponsible, vulnerable, indecisive, forgetful, unforgiving, and critical. Famous people with AB blood types include Barack Obama, Marilyn Monroe, Jackie Chan, and John F. Kennedy.
Here, a person's blood type is popularly believed to determine temperament and personality. "What's your blood type?" is often a key question in everything from matchmaking to job applications. According to popular belief in Japan, type As are sensitive perfectionists and good team players, but over-anxious.
People with type A blood will react against type B or type AB blood. People with type B blood will react against type A or type AB blood. People with type O blood will react against type A, type B, or type AB blood. People with type AB blood will not react against type A, type B, type AB, or type O blood.
Golden blood is the rarest kind of blood known in the world. It's also called Rh null blood, and about 43 people have ever been reported to have it. "The name 'golden blood' can sound like this is blood that's somehow more pure or safe for transfusions,” Dr. Otrock shares.
Resource Links. Bloomberg Several studies have now shown that people with blood type O are less susceptible to contracting Covid, and those with blood type A are more likely to get it.
In molecular history, type A appears to be the 'oldest' blood type, in the sense that the mutations that gave rise to types O and B appear to stem from it. Geneticists call this the wild-type or ancestral allele.
The blood is type AB which is the universal recipient. Both the flesh and blood showed signs of being alive. More recently, there have been several similar miracles around the world. Two of these miracles occurred in the Archdiocese of Buenos Aires when Pope Francis was the bishop of that diocese.
Yes, blood type is not as accurate as the DNA tests for ancestry, but still, your ABO blood type can tell a colorful story about your background. Hereditary blood type traits you receive from your parents are genetic, and population and geographical differences exist in the prevalence of blood types.
A high incidence of obsessive-compulsive disorders, commonly associated with elevated cortisol levels and decreased melatonin levels, was found in the group A blood donors32,37.
Accordingly, Kretschmer classified four types of people: (1) the asthenic type who has a slender body ('leptosome') and is more prone to schizophrenia (SCZ); (2) the pyknic type who has a round body and is likely to become manic-depressive illness [bipolar disorder (BD)]; (3) the athletic type with a muscular body who ...