Serum or Plasma Substance Concentration (Mass Concentration) for a Specific Protein or Biomarker (e.g., Alpha-1 Antitrypsin, C-Reactive Protein, or similar)
This test measures the amount of a specific protein or substance in your blood, often used to check for health conditions like inflammation, liver disease, or genetic disorders.
["Understanding your blood protein levels can help diagnose or monitor certain health conditions."]
Key facts at a glance
- LOINC
- 75080-2
- Short code
- N-Ac-L-Asp SerPl-sCnc
- Synonyms
- N-Ac-L-Asp SerPl-sCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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 This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like persistent fatigue, unexplained weight loss, swelling, or if they suspect conditions such as liver disease, heart problems, or an immune disorder. It could also be part of a routine check-up or screening for genetic conditions.
What to Expect Before the Test
You may be asked to fast for a few hours before the test, depending on the specific protein being measured. Otherwise, you can prepare as usual. Bring any medications you’re currently taking to your appointment.
How the Test is Performed
A healthcare professional will draw blood from a vein in your arm using a small needle. The blood sample will be sent to a lab where it is analyzed to measure the concentration of the protein or substance.
What the Results Mean
Results will be compared to standard reference ranges for that specific protein or substance. High or low levels may indicate underlying health issues that need further evaluation by your doctor.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
How long does it take to get my test results?
Can I eat or drink before this test?
What should I do if I have a reaction during the blood draw?
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