Inflammation & immunity

Neutrophil-to-lymphocyte ratio (NLR)

NLR compares two types of white blood cells to show how much stress and inflammation your immune system is under.

Included in every $199 draw

Key benefits of NLR testing

Turns a routine blood count into a simple inflammation signal.
Reflects physical stress, poor sleep and overtraining.
Adds context to hs-CRP when inflammation is in question.
Tracks recovery after illness or a hard training block.
Costs nothing extra, since it comes from your complete blood count.

What is NLR?

Neutrophils are first responders that rise with stress, infection and inflammation. Lymphocytes coordinate longer-term immunity and tend to fall under stress. Dividing one by the other gives a single number that shows the balance.

Why NLR matters

A higher NLR means your immune system is leaning toward an alarm state. Studies link a persistently high NLR with higher risk of heart disease and worse outcomes in many chronic conditions. It’s a signal to look deeper, not a diagnosis.

What your NLR results mean

Low: often fine. Very low values can follow some viral infections or medications.
In range: a balanced immune system with low background stress.
High: points to infection, inflammation, physical stress or recent hard exercise. Persistently high values deserve a physician review.
Context matters: a cold, a tough workout, poor sleep or steroid medications can raise NLR for days. Retest when you’re well.

Standard vs. optimal range

	Range
Standard range	About 0.8 to 3.5 in healthy adults (not flagged by most labs)
Insyght optimal range	Set by the Insyght medical team

LowHigh

Lab reference rangeYour optimal range

A value can read normal on a standard panel and still sit outside optimal. Insyght flags it.

Do I need an NLR test?

Always run down, getting sick often, or training hard without bouncing back? NLR shows whether your immune system is stuck on high alert.

See what your blood count is really saying

Insyght reports NLR and 17 more immune and inflammation markers, including hs-CRP and the CRP/albumin ratio, reviewed by a physician. $199 a year.

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Similar biomarkers

hs-CRPPlatelet/lymphocyte ratioMonocyte/lymphocyte ratioCRP/albumin ratioWBC

Frequently asked questions

How is NLR calculated?

Your absolute neutrophil count is divided by your absolute lymphocyte count, both taken from a standard complete blood count.

What is a normal NLR?

Most healthy adults fall between about 1 and 3. Labs rarely flag it, so Insyght reads it against optimal ranges.

Can exercise raise NLR?

Yes. Intense training can raise it for a day or two. Skip hard workouts for 48 hours before your draw.

Medically reviewed by Dr. Stephen J. Nicholas, MD, Sports medicine and orthopedic surgery, NY Orthopedics. Last updated October 21, 2026.