You felt uncomfortable and visited the doctor, but nothing wrong. Or, you always feel weak physical strength but you are young. Have you heard such things? Someone looks like very strong suddenly got cancer or other serious illness and died without any early warning. Why could these happen? Normally, the health test results notify whether we have got diseases or not. Health is a state of complete physical, mental and social well-being and not merely the absence of diseases or infirmity. However, some people are in different health status. We can call it the third status or sub-health condition. The sub-health condition refers to a state at which the patient experiences reduction in his or her vitality and adaptability although there is no defined disease diagnosed. It is a state featuring physiological function deterioration between health and illness. It is difficult to tell a person whether he is in sub-health condition or in good health by normal examination. Live blodd analysis and dry blood test is not omnipotent and it could not replace traditional clinical examination. However, it is truly a better way for people to learn their health conditions, help people to find sub-health evidence that normal test can not cover, and also accurate prediction before we get illness. We will find that live blood analysis and dry blood test will prompt us to adjust our foods and living habits earlier, or do some health protection, in order to eliminate some dangerous factors, and nip the hidden disease in the bud.