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N-Methylnicotinamide (NMN) in Urine

Published: August 9, 2026Updated: August 16, 2026

This test measures a breakdown product of niacin (vitamin B3) found in your urine. It helps assess how your body processes niacin and may be used in research or specialized studies.

Quick summary

["This test may help evaluate niacin metabolism or support research on vitamin B3 metabolism."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
49671-1
Short code
N men DNA Spec Ql NAA+probe
Synonyms
N men DNA Spec Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you’re participating in a study focused on niacin metabolism, vitamin B3 deficiency research, or if symptoms like fatigue, skin changes, or digestive issues suggest potential vitamin deficiencies. It’s not a routine screening test for most patients.

What to Expect Before the Test

No special preparation is typically needed. You’ll provide a urine sample, often collected over a 24-hour period (unless specified otherwise). If you’re unsure about timing, follow your provider’s instructions.

What the Test Results Mean

Results are qualitative (qual) or quantitative (mass concentration) and compare your NMN levels to expected ranges for healthy individuals. Abnormal results may indicate how your body processes niacin, but they’re not diagnostic for vitamin deficiencies alone.

Common Reasons for Abnormal Results

Elevated NMN levels might suggest increased niacin metabolism or certain metabolic conditions. Lower-than-expected levels could indicate impaired niacin processing, though this is less common. Always discuss results with your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

NMN Urine Test

Frequently asked questions

Is this test covered by insurance?
Check with your insurance provider before the test, as coverage depends on the reason for testing. Some research studies may require separate billing arrangements.
How long will I need to wait for results?
Results may take several days to weeks, depending on the lab and whether it’s part of a research study. Your provider will contact you once available.
Can I take supplements before this test?
Avoid niacin (vitamin B3) supplements or high-niacin foods for at least 24 hours before testing to ensure accurate results. If unsure, ask your provider.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy