LDH
LDH (lactate dehydrogenase) is an enzyme found in many body tissues including the liver, heart, kidneys, muscles, and blood cells. It is a general marker of tissue damage.
Category: Liver Function
Also known as: ldh, lactate dehydrogenase, lactic dehydrogenase, ld, L.D.H, Lactic acid dehydrogenase, L-lactate dehydrogenase, laktat dehidrogenaza
Reference range: 120–246 U/L (Source: ABIM)
Standard unit: U/L
High values may indicate
High LDH may indicate liver disease, hemolytic anemia, heart attack, muscle injury, certain cancers such as lymphoma, or pulmonary embolism.
Low values may indicate
Low LDH is rare and generally not a clinical concern. Genetic mutations can occasionally cause low LDH levels.
Frequently asked questions
- What is a normal LDH level?
- A typical reference range for LDH is 120–246 U/L (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is LDH measured in?
- LDH is most commonly reported in U/L. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do LDH reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track LDH over time?
- Yes. Upload results from any lab and BloodId charts your LDH over time against its reference range, so you can see whether the trend is rising, falling, or stable.