What's this test for?

This test is ideal if you're experiencing unexplained fatigue, bone pain, frequent infections, or if you've been asked to monitor a plasma cell condition. It measures free kappa light chains, small proteins made by your immune system, which can rise when certain blood or bone marrow conditions are present. It's often used to help track conditions like monoclonal gammopathy or multiple myeloma over time.

What's included in this test?

This test measures free kappa light chains, a type of protein fragment produced by your immune system's antibody-making cells. Checking this level helps spot unusual antibody activity that can be an early sign of certain blood or bone marrow conditions, making it a useful monitoring tool.

What happens after I get my results?

Your results will show up in your online account with the normal range clearly explained next to your value. If your level falls outside the expected range, simple next steps include retesting to confirm the result and watching for related symptoms like fatigue or bone pain, and seeking prompt medical care if you notice severe symptoms. You can download a standard lab report directly from your account at any time, and the trends feature lets you track this marker over multiple tests to see how it changes over time.

How can I naturally support healthy immune protein levels?

Staying well hydrated helps your kidneys filter proteins efficiently, and eating a balanced diet with plenty of fruits, vegetables, and lean protein supports overall immune health. Regular exercise and adequate sleep also help keep your immune system balanced. These habits won't reverse an underlying condition, but they support your body while you monitor results over time.

When will I get my results?

Results for this test are typically ready within about 7 days of your sample being collected. Once processed, they'll appear automatically in your online account where you can view and download them.

Who should consider this test?

This test is a good fit for people who have been told they have an abnormal protein finding on a prior blood or urine test, those with a family history of plasma cell disorders, or anyone monitoring a known condition. It's also useful for people with symptoms like ongoing fatigue, bone pain, or repeated infections that haven't been explained.

What symptoms indicate I may need this test?

Common symptoms that might prompt this test include persistent fatigue, unexplained bone or back pain, frequent infections, and unexplained weight loss. Some people also notice swelling or numbness, which can be related to protein buildup. If you're experiencing several of these together, this test can help clarify what's going on.

What does high free kappa light chain mean?

A higher than normal result can mean your body is producing extra antibody fragments, which is sometimes linked to plasma cell conditions or kidney function changes. It doesn't automatically mean something serious is wrong, but it's worth retesting and watching closely. Staying hydrated and keeping track of any new symptoms can help you and your results paint a fuller picture over time.

What causes high or low free kappa light chain levels?

High levels are most often linked to increased antibody production from immune cells, or sometimes reduced kidney clearance since the kidneys normally filter these proteins out. Low levels are less commonly a concern and can simply reflect normal variation. Inflammation, infections, and certain chronic conditions can also nudge this marker up or down.

How often should I retest?

If you're monitoring a known condition, retesting every 3 to 6 months is common, but this can vary based on how stable your prior results have been. If this is your first time testing and your result comes back abnormal, a follow-up test in a few weeks to confirm the finding is a reasonable next step. Use the trends feature in your account to keep an easy record of changes over time.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

Free Kappa Light Chain Test - Immune Protein Check

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]