Urine Nitrite
Urine nitrite detects bacterial conversion of dietary nitrate to nitrite and indicates a urinary tract infection when positive. It is highly specific for infection with gram-negative organisms such as E. coli, but sensitivity is lower because not all bacteria produce nitrites and the urine needs time in the bladder for the reaction. Interpretation is paired with leukocyte esterase.
Optimal range: who says what
No institution or named practitioner we track states an optimal target for Urine Nitrite. How we verify ranges.
- General guidance, no named sourceNegativeExpected in health; positive suggests bacterial infection
- Lab reference intervalNegativeWhat a lab report flags against. A lab interval is not an optimal target.
3 providers include this
Urinalysis
Why Urine Nitrite matters
A positive result strongly suggests bacterial urinary tract infection, since certain bacteria convert nitrates to nitrites. However, a negative result doesn't rule out UTI, as not all bacteria produce nitrites.
Reading a Urine Nitrite result
Many urinary tract bacteria convert nitrate in urine to nitrite, so a positive result usually means a urinary tract infection. A negative result does not rule one out, because some bacteria do not make nitrite (MedlinePlus).
Common causes of a high result
- A bacterial urinary tract infection
Caveat: Home UTI strips can miss an infection; see a clinician if symptoms continue despite a negative strip (MedlinePlus).
What to check next
- Leukocyte esterase and urine white cells, read together with nitrite
- A urine culture, which identifies the bacteria and guides the antibiotic choice (MedlinePlus)
Sources: MedlinePlus: Nitrites in urine. Checked against these sources 2026-09-23. General information, not medical advice; your lab's reference interval and your clinician's reading take precedence.
Which Providers Test Urine Nitrite?
Empirical Health is both the cheapest ($190/year) and the most comprehensive (100+ biomarkers) panel that includes Urine Nitrite.
3 panels that include it, cheapest first
| Provider | Annual Cost | Total Biomarkers | $/Biomarker |
|---|---|---|---|
| $190 | 100+ | $1.90 | |
| $365 | 100+ | $3.65 | |
| $499 | 100+ | $4.99 |
$/Biomarker is annual cost divided by the panel's advertised biomarker count, not the price of this one test. We track 23 blood test providers (32 plans); 21 of those plans are itemized marker by marker. Compare all of them.
18 itemized panels do not include Urine Nitrite
Superpower · WHOOP Advanced Labs · Labcorp OnDemand · Life Extension Elite · Everlywell · Mito Health · InsideTracker · Function Health · Marek Health Base · Marek Health Comprehensive · Marek Health Complete · Marek Health Executive · Oura Health Panels · SiPhox Health · Hims Labs · Healthspan · Vitality Blueprint Standard · Vitality Blueprint Elite
11 providers not itemized in our matrix
We have not itemized these marker by marker (some sell tests one at a time), so this page cannot say whether they offer Urine Nitrite. Check with them directly.
Life Extension Standard · Quest Health · Ultrahuman Blood Vision · Lifeforce · Hundred Health · Personalabs · Walk-In Lab · HealthLabs · WHOOP Specialized Panels · Marek Health Essential · Vitality Blueprint Upload
Frequently Asked Questions
What is the optimal range for Urine Nitrite?
No institution or named practitioner we track states an optimal target for Urine Nitrite. General guidance without a named source: Negative (Expected in health; positive suggests bacterial infection). Lab reference interval: Negative. That is what a lab report flags against, not an optimal target.
Which blood test providers include Urine Nitrite?
3 of the 21 blood testing panels we itemize marker by marker include Urine Nitrite in their panels. This biomarker has limited availability.
Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed Aug 26, 2026 · First published Nov 30, 2025