›

›

Vitamin B3 (Niacin)

Vitamins

Vitamin B3 (Niacin)

Also known as: Niacin, Nicotinic Acid

COMMON RANGE

5 – 48

µg/L

0

121

M

Mayo Clinic Laboratories

Adult

See all sources ↓

CONVERT & COMPARE

µg/L

=

27

mcg/L

=

27

ug/L

=

27

ng/mL

Reference ranges by source

Published adult intervals: 2, from 2 named sources, shown in µg/L.

SOURCE

SEX

AGE

RANGE

VISUAL

CITE

M

Mayo Clinic Laboratories

All

≥18y

5 – 48 µg/L

Q

Quest Diagnostics

All

≥18y

≤110 µg/L

M

Mayo Clinic Laboratories

All · ≥18y

5 – 48 µg/L

Q

Quest Diagnostics

All · ≥18y

≤110 µg/L

Related biomarkers

More tests in the vitamins category.

Vitamin D, 25-Hydroxy

Vitamin D, 1,25-Dihydroxy

Vitamin B12 (Cobalamin)

Methylmalonic Acid (MMA)

Sources

Mayo Clinic Laboratories

Quest Diagnostics

Last updated 2026-05-02

This page presents source-specific reference data and sourced explanations. For general wellness information only. This is not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.

Track your vitamin b3 (niacin) in MyBloodTest

Save reviewed lab results and follow their history. Scanning requires sign-in and has plan-specific limits.

Download on the

Open the web app

iOS · Android · Web

Scan a lab report

Import past results

© 2026 Joelis labs, UAB. All rights reserved.