Alpha-fetoprotein 29 can be caused by bad habits or by liver diseases such as hepatitis, liver cancer, cirrhosis and so on. 1. Bad life habits: alpha-fetoprotein is a glycoprotein from embryonic liver cells and is a tumor marker. Under normal circumstances, serum alpha-fetoprotein is less than 25 μg/L. Therefore, alpha-fetoprotein 29 μg/L belongs to a mild elevation, which may be related to the consumption of greasy food, drinking, staying up late, diet and other reasons; physiological elevation can also occur during pregnancy. 2. Liver disease: AFP 29μg/L may also be caused by liver cancer, hepatitis, cirrhosis, fatty liver and other diseases. Therefore, the cause of alpha-fetoprotein 29μg/L can not be diagnosed, and further examination of liver ultrasound, CT, liver function and other items are needed to find the cause.