You’ve heard of being cold-blooded, hot-blooded, red-blooded and blue-blooded – but is there really a blood type personality?
Despite popular belief, there is no solid scientific evidence to support the theory that blood type affects personality. A 2014 large-scale survey of over 10,000 people from both Japan and the US found that blood type does not influence personality at all. That doesn’t stop the theory from persisting, though.
Read on to find out more about the blood type personality theory, its history and the science behind it.