What does elevated lactate dehydrogenase (LDH) indicate?

Elevated lactate dehydrogenase (LDH) levels are commonly associated with multiple factors. Physiological causes may include poor dietary habits or the growth and development phase in children and adolescents. Additionally, certain disease states—such as hemolytic anemia, pulmonary embolism, progressive muscular atrophy, and hepatitis—can also lead to increased LDH levels. In these conditions, cellular damage results in the release of LDH into the bloodstream, thereby elevating serum LDH concentrations. Other potential causes include liver disease, hematologic disorders, myocardial infarction, malignancies, and skeletal muscle injury. In such cases, elevated LDH reflects tissue damage or functional impairment in the affected organs or systems. Prompt medical consultation is recommended so that a physician can establish an accurate diagnosis and initiate appropriate treatment based on clinical symptoms and diagnostic test results. Maintaining healthy lifestyle habits—including a balanced diet, moderate physical activity, and adequate rest—can support overall health.