Studies found three blood groups have a heightened risk of developing canc*r. See below 👇

In Japan, Your Blood Type Says Something About Your Personality
In Japan, it’s believed that your blood type indicates more about you than just your health risks – it suggests something about your personality.

If you have type A blood, you’re kinben (diligent), kireizuki (neat), and sensitive to other’s emotions. If you’re type O, you’re jihatsuteki (a self-starter), riseiteki (logical), and like to do things your own way. Furthermore, some blood types are said to be more compatible with others, so believers in ketsueki-gata might take blood type into account when choosing a romantic partner.

The theory is similar to astrology in the Western world, where the concept originated – specifically, in Europe. Research in the 1910s and ’20s examined blood types to try and prove that some races (Europeans) were superior to others (everyone else). The defunct research was picked up by Japanese researcher Takeji Furukawa in 1927, and while it received some attention, it wasn’t until the 1970s that Masahiko Nomi popularized the idea through a series of books.

If you want to learn more, there’s actually an informative anime about it, and it’s pretty fun.

Those With Blood Type A Are More At Risk When It Comes To Alcoholism
Those with the blood type A may be at a higher risk of developing an addiction to alcohol when compared with other blood types. Antigens, or foreign substances that elicit an immune-system response in our bodies, may be to blame for this phenomenon. It’s theorized that A-type antigens may not be able to produce significant antibodies to fight off the foreign substance at play (alcohol).

Those with blood type A may not be able to fight off the effects of alcohol as successfully, meaning the body is affected at a higher level, leading to an increased chance of addiction.