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Protein S (Free)
Blood
Protein S (Free)
Also known as: Free Protein S, Free PS
COMMON RANGE
65 – 160
%
38.5
177
M
Mayo Clinic Laboratories
Adult Male
↗
See all sources ↓
Reference ranges across 10+ sources
Adult reference ranges from 6 entries across 4 trusted sources, shown in %. Compare side-by-side.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
A
ARUP Laboratories
All
≥18
54.8 – 152 %
↗
M
Mayo Clinic Laboratories
Male
≥18
65 – 160 %
↗
M
Mayo Clinic Laboratories
Female
≥18
50 – 160 %
↗
M
Mayo Clinic Laboratories
Female
≥18
65 – 160 %
↗
Q
Quest Diagnostics
All
≥18
52.6 – 165 %
↗
L
Labcorp
All
≥18
52.6 – 151 %
↗
A
ARUP Laboratories
All · ≥18
↗
54.8 – 152 %
M
Mayo Clinic Laboratories
Male · ≥18
↗
65 – 160 %
M
Mayo Clinic Laboratories
Female · ≥18
↗
50 – 160 %
M
Mayo Clinic Laboratories
Female · ≥18
↗
65 – 160 %
Q
Quest Diagnostics
All · ≥18
↗
52.6 – 165 %
L
Labcorp
All · ≥18
↗
52.6 – 151 %
Related biomarkers
Often tested alongside protein s (free) or part of the same panel.
White Blood Cells (WBC)
Blood
Red Blood Cells (RBC)
Blood
Hemoglobin (Hgb)
Blood
Hematocrit (Hct)
Blood
Platelets (PLT)
Blood
Mean Corpuscular Volume (MCV)
Blood
Sources
A
ARUP Laboratories
M
Mayo Clinic Laboratories
Q
Quest Diagnostics
L
Labcorp
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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