A human alpha-fetoprotein of 45 ng is not normal and should be examined promptly in the hospital. Alpha-fetoprotein is generally a serum glycoprotein synthesized by the yolk sac as well as liver cells during fetal life, which is mainly related to the occurrence of liver tumors, liver cancer and other liver diseases. The normal range value of alpha-fetoprotein, in general, is within 25 ng. If the alpha-fetoprotein is 45 ng, it may be caused by poor lifestyle habits such as long-term alcohol consumption and poor diet, or it may be caused by suffering from hepatitis, liver tumors, liver cancer and other diseases. However, some pregnant women and other special people may also cause increased alpha-fetoprotein. Therefore, if alpha-fetoprotein of 45 ng occurs, you should go to the hospital in time for the appropriate examination such as abdominal ultrasound and magnetic resonance. If you have a fetoprotein of 45 nanograms, you should pay attention to a light diet, avoid drinking and smoking, keep a regular routine, and go to the hospital for examination in time.