Blood type and personality:

-Blood type A: compassionate, organized, efficient, leaders
-Blood type B: meditative, flexible, friendly, action-oriented
-Blood type O: practical, assertive, attentive, empathetic
-Blood type AB: rational, calm, strong, forward thinking

Blood type and stress:

-Blood type A: Highly susceptible to high cortisol and takes longer to recover from stress. Drinking water helps to calm down.
-Blood type B: Mostly calm, but reaches the limit and has an extreme swing to high levels of cortisol. Breathing helps to return to harmony.
-Blood type O: Susceptible to an outburst of anger, because of their primordial ancestry. Visualizing something peaceful helps to restore peace.
-Blood type AB: Handles stress very well, can become frustrated at the worst. Activity like walking helps release built-up tension.