Although mental health is largely centered in the brain, it looks like another element of the body may affect it as well. Really, there are some pretty surprising things your blood type can tell you about your mental health. The relationship between mental health and the body may be more mysterious than suspected.
Not all blood is the same, and it's typically classified into eight common blood types. In general, there are four major blood groups, and each of those can be further divided into two groups depending on the presence of a protein called the Rh factor, according to the American Red Cross. With this in mind, the most common blood types are A+, A-, B+, B-, O+, O-, AB+, and AB-. (The plus or minus after the letter indicates whether the Rh factor is present.)
To find out your blood type, visit a doctor, donate blood, or invest in a blood testing kit. It's helpful to know your blood type if you want to be a blood donor, and it's crucial info for anyone getting a blood transfusion or surgery.
Although blood type is important to know for physical health reasons, it may have some relation to a person's mental health as well. Although more research is needed to fully flesh out the current studies, there does appear to be some link between mental health conditions and a person's blood type.