Usually the significance of vitamin testing is the most common means of checking the essential vitamins in the body in clinical practice. The most common test used in clinical practice is called the nine vitamins, which are vitamin A, vitamin B1, vitamin B6, vitamin B12, vitamin C, vitamin D, vitamin E, vitamin K and folic acid. These nine vitamins are nutrients that the body cannot be deficient in, and if the body is deficient in supporting the body vitamins, they must be replenished by means of medication or food. If the body lacks these nine vitamins, there will be digestive system dysfunction, digestive and absorption dysfunction, circulatory system dysfunction, there will be myocardial ischemia, chest tightness, shortness of breath, palpitations, arrhythmia, nervous system dysfunction will appear peripheral radiculitis and poor sleep rest, etc. The significance of vitamin testing is very great.