Lactic Acid in Serum or Plasma (Concentration)
This test measures the amount of lactic acid in your blood, which is a byproduct of energy production when oxygen is limited. High levels may indicate conditions affecting how your body uses oxygen or energy.
["Lactic acid levels can signal problems with oxygen delivery or metabolism in your body."]
Key facts at a glance
- LOINC
- 22375-0
- Short code
- LACV IgM Titr CSF
- Synonyms
- LACV IgM Titr CSF
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your doctor may order this test if you have symptoms like extreme fatigue, shortness of breath, or muscle pain, especially after exercise or in conditions where oxygen use is higher. It’s also used to monitor people with certain medical conditions, such as heart or lung diseases, or those receiving treatments that might affect metabolism.
Common Conditions Monitored
Elevated lactic acid can signal conditions like severe dehydration, heart failure, kidney problems, or metabolic disorders. Low levels are less commonly checked but may occur in rare metabolic or genetic conditions.
Sample Collection and Preparation
A blood sample is taken from a vein, usually in your arm. The blood is placed in a tube and sent to a lab for analysis. If you’re fasting, follow your doctor’s instructions to ensure accurate results.
What to Expect Before the Test
No special preparation is usually needed, but inform your doctor about any medications you’re taking, especially those for diabetes, heart conditions, or infections. Avoid strenuous activity or eating heavy meals before the test if instructed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Lactic Acid Level
Frequently asked questions
What causes elevated lactic acid levels?
What does it mean if my lactic acid level is low?
Frequency depends on your health condition. If you have a chronic illness like heart disease or diabetes, your doctor may order this test periodically to monitor your progress. Follow their guidance for follow-up testing.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy