The Blood type O is commonly known as the universal blood type.
In Japan, they believe that a lot can be said about your personality based on your blood type.
For them, people with type O blood tend to be responsible, committed, organized, focused, conscientious and practical.
Of course, it has its disadvantages.
People with blood type O can add "vulnerable" to its list of traits.
When it comes to their health, it is revealed that they can be more susceptible to some diseases, such as ulcers and thyroid dysfunction.
Prior to this, some side effects like obesity, fluid retention and fatigue can be experienced by the members of this group because they possess low levels of thyroid hormone and not enough iodine, a chemical element whose sole purpose is to sustain the flow of thyroid hormones.
Their stomach also carry higher levels of stomach acid than other blood types, often resulting in stomach irritation and stomach ulcers.
Some experts suggest that these people should refrain from drinking too much caffeine and alcohol because it raises the level of adrenaline, which is already high in their case.
They are also advised to exercise 3-4 times a week or every day, preferrably.