Each of us carries in our blood the genetic memory of our history. Anthropological studies have proven irrefutably that certain archetypal personality and behavior traits throughout our history are directly linked to survival.


The process of survival creates stress.

  1. Within each blood type there are marked neurochemical similarities in our response to stress; different blood type differs.
  2. Stresses of ancient times were life-threatening but happened intermittently. Stresses of modern times are not intense but constant. Constant ?piling-on? of stress is what makes it dangerous.
  3. Why does the same external stimulus of stress produce different response in different people? Example ? in a typical rush hour traffic jam, some people experience road rage while others take the delay in stride. Similarly, some people sleep soundly after a tiring day of high thrill activities while others experience restless sleep.

The Link with Blood Type

  1. Some of the key elements that activate our particular reactions to stress are located in the same locus on our DNA as that of our blood type ? 9q34.
  2. Blood type plays a significant role in:
    – how much stress we carry around inside all the time
    – the way we respond to stress, and
    – how quickly we recover from stress.

The Mechanics of Stress

During physiological or emotional stress:

Our body needs to balance the activation of the sympathetic and parasympathetic systems so as to regulate when to ?fight & flight? and when to recover from it.

An overactive sympathetic system leads to physical and mental burnout.

The sympathetic system is triggered by the HPA axis:

  • Hypothalamus
  • Pituitary
  • Adrenal

Type O ? The Dopamine Factor

Type O faces the tricky balance of the level of dopamine. Appropriate levels must be supplied to the limbics (for feelings) and the cortex (for thoughts) of the brain. Otherwise paranoia, poor attention, hyperactivity, temper tantrums, Parkinson?s disease and other emotional problems like bipolar disease and schizophrenia can result.

For Type O, stress is not in itself a problem; it?s how you respond to stress. Stress goes directly to the muscles. Healthy Type Os are meant to release the built-up hormonal forces through vigorous and intense physical exercise. Not only does a regular intense exercise program elevate spirits, it enables the Type O to maintain weight control, emotional balance and a strong self-image. Slight acidity in tissue during workout will enhance the fat burning activity and metabolism.

Personality of Type O

Strong, self-reliant, daring, intuition, innate optimism, focused and driven, successful, powerful, leadership qualities.

Type A ? The Cortisol Factor

Cortisol is essential for life. However it is a double-edged sword. Proper levels reduce inflammation, reduce allergy tendencies and help to heal wounds, inappropriate levels will create the opposite effect. High cortisol leads to hypertension, heart disease, muscle loss, insomnia, weakened immune system, Alzheimer?s disease, senile dementia and obsessive-compulsive disorder (OCD).

Type As react to the first stage of stress ? the alarm stage ? intellectually. As the stress signals throb in the immune system, they grow weaker. The heightened sensitivity of the nervous system gradually frays the person?s delicate protective antibodies. However, when a Type A person adopts ?quieting techniques?, they can achieve great benefits by countering negative stresses with focus and relaxation. They do not respond well to continuous confrontation, and need to consider and practice the art of stillness as a calming charm. Heavily competitive sports and exercises will only exhaust a Type A?s nervous energy and make them tense all over again, leaving the immune system open to illness or disease.

Personality of Type A

Decent, orderly, law abiding and exhibit self control. Loners do poorly in group settings. Clever, sensitive, passionate and very smart to meet the challenges of a more complex life. But they tend to have more tightly wired systems. They bottles up their anxiety ? because that?s what you do when you?re trying to get along with others ? but when they explode ? watch out! They are also poorly suited for leadership position.

Type B and AB ? The Nitric Oxide (NO) Factor

In recent years, NO has been found to be important in our biological processes including our nervous and immune systems. It has been studies in relation to anorexia, cancer, drug addiction, diabetes, hypertension, learning disorder, male impotence and tuberculosis, just to name a few.

Personality of Type B

Had to be flexible and creative in order to survive. They have the elements of the mental, more sensitively agitated activity of the Type A, with the sheer physical reactions and aggression of the Type O. They can see others? points of view.

Personality of Type AB

Type AB is a merging of the edgy, sensitive Type A with the more balanced and centred Type B. The result is a spiritual, somewhat flaky nature that embraces all aspects of life without being particularly aware of the consequences. These qualities make Type ABs very appealing and popular. It?s easy to like someone who welcomes you with open arms, doesn?t hold grudges when you disappoint them and always says the most diplomatic thing in every situation.

Hereditary Fault-line

If you are in a state of health and balance, your genetic fault-line will not be noticeable at all. However, if you live in a state of high stress and mal-adaptation, the fault line will not only manifest itself but also give way to chronic diseases.


Most doctors prescribe exercise as a cure for stress. In relation to blood type theory, exercise has to be practiced carefully. If exercise is beyond your level of tolerance, then it can actually become a stressor. Among the many factors that determine your tolerance for exercise ? nutrition, conditioning, prior training ? blood type is an important one.

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