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Vitamin B12 (Cobalamin)
Vitamins
Vitamin B12 (Cobalamin)
COMMON RANGE
180 – 914
pg/mL
73.5
1352
M
Mayo Clinic Laboratories
Adult
↗
See all sources ↓
CONVERT & COMPARE
pg/mL
=
404
pmol/L
Reference ranges across 10+ sources
Adult reference ranges from 5 entries across 5 trusted sources, shown in pg/mL. Compare side-by-side.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
A
ARUP Laboratories
All
≥18
180 – 914 pg/mL
↗
M
Mayo Clinic Laboratories
All
≥18
180 – 914 pg/mL
↗
Q
Quest Diagnostics
All
≥18
232 – 1245 pg/mL
↗
L
Labcorp
All
≥18
232 – 1245 pg/mL
↗
W
World Health Organization
All
≥18
200 – 900 pg/mL
↗
A
ARUP Laboratories
All · ≥18
↗
180 – 914 pg/mL
M
Mayo Clinic Laboratories
All · ≥18
↗
180 – 914 pg/mL
Q
Quest Diagnostics
All · ≥18
↗
232 – 1245 pg/mL
L
Labcorp
All · ≥18
↗
232 – 1245 pg/mL
W
World Health Organization
All · ≥18
↗
200 – 900 pg/mL
Ages 0–17 (CALIPER)
PEDIATRIC
3 age- and sex-stratified entries from the Canadian Laboratory Initiative on Pediatric Reference Intervals.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
C
CALIPER — Canadian Pediatric Reference Intervals
All
0–6
250 – 1100 pg/mL
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All
6–13
200 – 900 pg/mL
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All
13–19
200 – 900 pg/mL
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All · 0–6
↗
250 – 1100 pg/mL
C
CALIPER — Canadian Pediatric Reference Intervals
All · 6–13
↗
200 – 900 pg/mL
C
CALIPER — Canadian Pediatric Reference Intervals
All · 13–19
↗
200 – 900 pg/mL
Related biomarkers
Often tested alongside vitamin b12 (cobalamin) or part of the same panel.
Vitamin D, 25-Hydroxy
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Vitamin D, 1,25-Dihydroxy
Vitamins
Folate (Serum)
Vitamins
Folate (RBC)
Vitamins
Methylmalonic Acid (MMA)
Vitamins
Vitamin B1 (Thiamine)
Vitamins
Sources
A
ARUP Laboratories
M
Mayo Clinic Laboratories
Q
Quest Diagnostics
L
Labcorp
W
World Health Organization
C
CALIPER — Canadian Pediatric Reference Intervals
Last updated 2026-05-02
This page aggregates publicly available reference data and clinical information from Mayo Clinic Laboratories and other sources. For general wellness information only — not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.
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