Lactic Acid in Serum or Plasma
This test measures the amount of lactic acid, a byproduct of energy production in your body, found in your blood. It helps assess how well your body is using oxygen and managing energy.
["Lactic acid levels can signal issues with oxygen supply or metabolism."]
Key facts at a glance
- LOINC
- 17039-9
- Short code
- LACV IgM Titr Ser
- Synonyms
- LACV IgM Titr Ser
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why Is This Test Done?
Your doctor may order this test to check for conditions affecting how your body produces or uses energy, such as heart or lung problems, severe infections, or metabolic disorders. It can also help diagnose or monitor conditions like shock, dehydration, or certain types of poisoning.
What to Expect Before the Test
You may be asked to fast for a few hours before the test, but this isn’t always required. Bring any medications you’re taking, as some can affect results. Avoid strenuous activity or smoking for a short time before testing.
During the Test
A healthcare provider will draw blood from a vein in your arm using a small needle. You may feel a brief pinch, but it usually doesn’t cause significant discomfort. The blood sample is then sent to a lab for analysis.
After the Test
You can usually return to your normal activities immediately. Apply gentle pressure to the site to stop any bleeding, and check for signs of infection (like redness or swelling) over the next few days. Report any unusual symptoms to your doctor.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated lactic acid levels can indicate conditions like low oxygen levels (hypoxia), severe infections, heart failure, or certain metabolic disorders. Low levels may suggest dehydration, overuse of certain medications, or other metabolic issues. Your doctor will interpret results in the context of your overall health and symptoms.
Short name
Lactic Acid
Frequently asked questions
How long does it take to get my results?
Can lifestyle changes affect lactic acid levels?
Is fasting required for this test?
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