For the doctors' arrival at home, the order amount must be more than 50 AZN. ALAT (ALT) (alanine aminotransferase) is an enzyme produced by the liver. The most important diseases that cause elevated ALT levels are fatty liver, obesity, diabetes, drug use, alcohol use, hepatitis, cirrhosis of the liver, bile duct obstruction, malignant tumors, and heart failure. It is better to take the test in the morning on an empty stomach.