CD4:CD8 Ratio Profile
The CD4:CD8 ratio measures the balance between two key immune cell types—helper T cells (CD4) and cytotoxic T cells (CD8)—in your blood. This ratio reflects overall immune health and can indicate whether your immune system is functioning optimally or under stress.
Athletes often use this marker to monitor training stress and recovery. Intense or prolonged training can temporarily lower CD4:CD8 ratio, signaling immune fatigue and increased infection risk. Tracking this ratio helps inform decisions about training intensity, recovery days, and sleep—key factors in managing the athlete's immunological response to heavy workloads.
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
$60.00$180
3.0× less than retail
Versus the typical direct-to-consumer retail price for this test (illustrative — consumer prices vary by provider and region).
$60.00
Peer-reviewed sources supporting the educational content on this page.
CD4:CD8 Ratio Profile
The CD4:CD8 ratio measures the balance between two key immune cell types—helper T cells (CD4) and cytotoxic T cells (CD8)—in your blood. This ratio reflects overall immune health and can indicate whether your immune system is functioning optimally or under stress.
The CD4:CD8 Ratio Profile test starts at $60.00 at Labcorp. No doctor's visit and no insurance needed; we do not bill insurance. Fitomics Insider members pay from $50.00.
Results for the CD4:CD8 Ratio Profile 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 CD4:CD8 Ratio Profile 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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