GPT and hepatocellular carcinoma: A study found that heat-killed L. johnsonii is capable of countering the elevation of alanine transaminase (ALT), aspartate transaminase (AST), gamma - glutamyl transferase (γ-GT), MDA, and triglyceride (TG) within the HepG2 cell line, which represents a human hepatocellular carcinoma cell line.