As a part of annual check-ups, ALT levels increased after different kinds of liver injuries and when at risk of hepatitis, liver cirrhosis, liver steatosis, nonalcoholic steatohepatitis, hepatic hypoperfusion, and nonalcoholic fatty liver disease (NAFLD), which were more common in individuals with elevated ALT than with normal ALT [8, 9]. The gene discussed is GPT; the disease is hepatitis A virus infection.