Free Protein S
Protein S acts as an essential cofactor alongside protein C to sustain balanced and smooth circulation.
Test your personal value
Enter the number from your lab report to instantly see how it compares to reference ranges.
Physiological Reference Ranges
The ranges below represent standard adult physiological values. Your laboratory's printed reference range always takes precedence.
60 – 130 %
60 – 120 %
70 – 130 %
What does a low result mean?
A mild reduction is very common and physiological during pregnancy or while using oral contraceptives.
What does a high result mean?
A higher percentage confirms robust natural anticoagulant buffering.
Questions ready for your doctor
Bring these questions to your next consultation to discuss with your healthcare practitioner:
- Could oral contraception or pregnancy account for this variation?
- Should this be verified when off hormonal medications?
- Does this require any special clinical attention?
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Important information — Medical notice
ScanMyLab is for informational purposes only. It does not provide a diagnosis and never replaces the advice of your doctor or laboratory.