This test measures the ratio and absolute counts of T-lymphocytes (which fight infections and coordinate immune responses) and B-lymphocytes (which produce antibodies). It helps assess whether your immune system has a balanced population of these two critical white blood cell types.
This test measures the ratio and absolute counts of T-lymphocytes (which fight infections and coordinate immune responses) and B-lymphocytes (which produce antibodies). It helps assess whether your immune system has a balanced population of these two critical white blood cell types.
When elevated: Elevated T or B-lymphocyte counts may indicate an active infection, immune activation, or in some cases, lymphoproliferative disorders. The specific pattern (which type is elevated) helps narrow down the underlying cause. When low: Low T or B-lymphocyte counts can suggest immunosuppression, bone marrow disorders, certain infections (like HIV), or effects of medications or treatments. A significant drop in either population warrants investigation.
T and B-lymphocyte balance is moderately relevant to athletes because intense training temporarily shifts immune cell distribution and can suppress certain populations during heavy load phases. Monitoring this differential may help identify whether your immune system is recovering adequately between training blocks, though single measurements are less predictive than trends over time.
Turnaround Time
1 day (up to 3 days)
Method
Flow cytometry
Order online
Choose your lab and check out. We send your lab requisition automatically — no doctor visit needed.
Get your sample collected
Visit a lab service center near you for a quick blood draw (or book at-home phlebotomy where available).
See your results
Your results land in your Insider portal, ready to review and act on — that easy.
Your price
$121.78$365
3.0× less than retail
Versus the typical direct-to-consumer retail price for this test (illustrative — consumer prices vary by provider and region).
$121.78
Peer-reviewed sources supporting the educational content on this page.
This test measures the ratio and absolute counts of T-lymphocytes (which fight infections and coordinate immune responses) and B-lymphocytes (which produce antibodies). It helps assess whether your immune system has a balanced population of these two critical white blood cell types.
This test measures the ratio and absolute counts of T-lymphocytes (which fight infections and coordinate immune responses) and B-lymphocytes (which produce antibodies). It helps assess whether your immune system has a balanced population of these two critical white blood cell types.
When elevated: Elevated T or B-lymphocyte counts may indicate an active infection, immune activation, or in some cases, lymphoproliferative disorders. The specific pattern (which type is elevated) helps narrow down the underlying cause.
The T + B-Lymphocyte Differential test starts at $121.78 at Labcorp. No doctor's visit and no insurance needed; we do not bill insurance. Fitomics Insider members pay from $97.91.
Results for the T + B-Lymphocyte Differential test are typically ready about 1 day after your draw, and up to 3 days for some samples. Your results land in your Insider portal.
No. When you order the T + B-Lymphocyte Differential test from Fitomics Research Labs, a licensed physician in our 50-state network reviews and signs your requisition after checkout, and it lands in your portal and inbox. Then visit any Labcorp, Quest, or BioReference patient service center for your draw; results post to your Insider portal.
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