Interleukin-6 Test: Booking, Price, and Results
About Interleukin-6 Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | IL-6 test, IL-6 serum test, Interleukin 6 blood test |
| Sample Type | Venous blood (serum or plasma) |
| Fasting Required | No fasting required |
| Report Time | Within 72 hours of sample collection |
| Recommended For | All ages and genders |
| Price | Starting at ₹3500 |
What Is an Interleukin-6 Test?
The interleukin-6 test measures the level of interleukin-6 (IL-6) in your blood. IL-6 is a signalling protein produced by the immune system in response to infection, injury, or inflammation. Doctors order this test to investigate suspected inflammatory or autoimmune conditions or to assess the severity of acute illness. A blood sample drawn from a vein in your arm is used for this test, also referred to as the interleukin 6 blood test, IL-6 test or IL-6 serum test.
What Does an Interleukin-6 Test Measure?
The IL-6 test analyses a single protein that plays a central role in the body's immune response. Here is what it assesses:
| Parameter | What It Indicates |
|---|---|
| Interleukin-6 (IL-6) | A pro-inflammatory cytokine (an immune signalling protein) that rises during infection, tissue injury, or chronic inflammation. It also stimulates the liver to produce C-reactive protein (CRP), a general marker of inflammation. |
IL-6 is produced by several types of cells, including immune cells, blood vessel lining cells, and fat cells. Measuring its level gives doctors a direct window into inflammatory activity in your body.
Why Is an Interleukin-6 Test Done?
The interleukin-6 test is ordered for a range of clinical reasons, from investigating new symptoms to tracking known diseases.
Common Symptoms That May Require This Test
A doctor may recommend the IL-6 serum test when you present with one or more of the following symptoms:
- Persistent or unexplained fever
- Chronic fatigue or persistent tiredness
- Joint pain and swelling
- Skin rashes without a clear cause
- Unexplained weight loss
- Generalised inflammation
- Recurrent or unresolved infections
Conditions This Test Can Help Detect
The interleukin-6 test can assist in identifying or evaluating a range of conditions. These include:
- Autoimmune disorders such as rheumatoid arthritis, systemic lupus erythematosus, ankylosing spondylitis, and inflammatory bowel disease
- Castleman disease (a rare disorder affecting lymph nodes)
- Systemic infections and sepsis
- Systemic Inflammatory Response Syndrome (SIRS)
- Severe COVID-19 illness
- Cardiovascular disease, diabetes, and stroke
- Certain cancers
Interleukin-6 Test for Chronic Disease Monitoring
The interleukin-6 test is also used to monitor disease activity in patients with known autoimmune or inflammatory conditions. In conditions such as rheumatoid arthritis and lupus, IL-6 levels often rise during flare-ups and fall when the condition is well-controlled. Periodic testing can help doctors assess how well a treatment plan is working over time.
How to Prepare and What to Expect
The IL-6 test requires very little preparation, but a few steps can help ensure your sample gives accurate results.
Do You Need to Fast?
No, fasting is not required before this test. You can eat and drink normally beforehand and have the sample collected at any time of the day. If your doctor has ordered additional tests alongside this one, check whether any of those require fasting.
Practical Tips Before Your Test
A few simple steps before your appointment can help produce a reliable sample:
- Avoid biotin (vitamin B7) supplements for at least 8 hours before the test
- Inform your doctor about all medications and supplements you are currently taking
- Avoid alcohol and smoking on the day of the test
- Avoid intense physical exercise immediately before the test, as it can temporarily raise IL-6 levels
- Wear comfortable, loose-fitting clothing that allows easy access to your arm
- Let your healthcare provider know about any recent infections, surgery, or injury
Step-by-Step Procedure
The sample collection process is straightforward and takes only a few minutes. Here is what to expect:
- A trained phlebotomist will clean the inside of your arm with an antiseptic wipe.
- A soft elastic band is tied around your upper arm to make the vein more visible.
- A thin needle is gently inserted into the vein, and a small amount of blood is drawn into a collection vial.
- The elastic band is removed, and the needle is withdrawn.
- Light pressure is applied to the puncture site, and a small bandage is placed over it.
- The labelled blood sample is sent to the laboratory, where IL-6 levels are measured using an electrochemiluminescence method or ELISA technique.
Factors That Can Affect Accuracy
Several factors may influence your IL-6 test result. Be sure to mention any of these to your doctor:
- Dehydration or poor sample handling conditions
- Recent strenuous exercise (can cause a temporary spike in IL-6)
- Time of day the sample is collected, as IL-6 levels show some daily variation
- Certain medications, particularly IL-6 receptor inhibitors such as tocilizumab
- Recent surgery, trauma, or acute illness
- Storage temperature and time between collection and processing
Understanding Your Interleukin-6 Test Results
Your doctor will review your interleukin-6 test result alongside your symptoms, medical history, and other investigations. The table below provides general reference ranges for context.
| Parameter | Normal Range | Unit |
|---|---|---|
| Interleukin-6 (IL-6) | 0 to 7 | pg/mL |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
A normal IL-6 level generally suggests there is no active infection or significant inflammation. However, a normal result does not always rule out an ongoing inflammatory process entirely. Elevated levels may point to autoimmune disease, sepsis, severe infection, certain cancers, cardiovascular disease, or stroke.
Results During Special Conditions
Certain personal and clinical factors can shift interleukin-6 test readings. Your doctor will take these into account:
- Obesity: Fat tissue produces IL-6, so people with obesity may have persistently raised baseline levels due to low-grade chronic inflammation.
- Older age: IL-6 levels tend to rise gradually with age. Adults over 60 years typically show reference values about twice as high as younger adults.
- IL-6 receptor inhibitor therapy: Patients taking medications such as tocilizumab may show elevated IL-6 levels in blood tests due to reduced clearance of the protein, which does not necessarily reflect increased inflammation.
- Surgery or trauma: Physical trauma can cause a temporary rise in IL-6 as part of the healing response.
How to Maintain Healthy Levels
General lifestyle habits can support a balanced inflammatory response:
- Maintain a healthy body weight, as excess fat tissue is associated with raised IL-6 levels
- Eat a diet rich in fruits, vegetables, and omega-3 fatty acids, which support a healthy immune response
- Get regular, moderate physical activity and adequate sleep to help regulate inflammation naturally
Lupin Diagnostics Interleukin-6 Test Price and Home Collection
The interleukin-6 test price starts at approximately ₹3500, with home sample collection available across cities. Here is a table with approximate prices:
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹3500 |
| Bengaluru | ₹3500 |
| Chennai | ₹3500 |
| Kolkata | ₹3500 |
| Pune | ₹3500 |
| Hyderabad | ₹3500 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Lupin Diagnostics offers home sample collection for the IL-6 test across multiple cities, with a certified phlebotomist visiting at your chosen time. All samples are processed in NABL-accredited laboratories to ensure accuracy and reliability. Your digital report is shared securely via email or WhatsApp within 72 hours of collection.
Frequently Asked Questions
The interleukin-6 test measures the amount of IL-6 in your blood to detect or monitor inflammation. Doctors use it to evaluate conditions such as autoimmune diseases, sepsis, severe infections, and inflammatory disorders. It is also used to track how well treatment is working for chronic inflammatory conditions.
No fasting is needed. You can eat and drink as normal before your appointment. However, avoid biotin supplements for at least 8 hours before the test and inform your doctor about any medications you are taking.
Yes, intense physical activity can cause a short-term rise in IL-6 levels as part of a normal body response. To avoid a misleading result, avoid strenuous activity on the day of your test and let your doctor know if you exercised heavily the day before.
Both tests are markers of inflammation. CRP is a more general indicator, while the IL-6 test gives more specific information about immune signalling activity. Doctors may order both together when they need a fuller picture of inflammatory severity, particularly in cases of sepsis or autoimmune disease.
Raised IL-6 levels suggest that your immune system is responding to something, such as an infection, autoimmune flare, or inflammatory process. High levels are associated with conditions including rheumatoid arthritis, lupus, sepsis, severe COVID-19, and certain cancers. Your doctor will interpret the result in context of your overall clinical picture.
Reports are typically ready within 72 hours (3 days) of sample collection. Lupin Diagnostics delivers results digitally via email or WhatsApp, so you can share them with your doctor promptly.
The IL-6 test is one piece of the diagnostic picture. It is usually ordered alongside other tests and assessed together with your symptoms and medical history. Your doctor will use all available information before arriving at a diagnosis.
Interleukin-6 Test: Booking, Price, and Results
