Albumin
The main protein in blood — used in calculating free testosterone.
What is it
Albumin is the most abundant protein in blood. It loosely binds testosterone and other small molecules, and is required for accurate calculation of free testosterone.
Why it's measured
Albumin is essential context for interpreting testosterone results and is also a marker of nutritional and liver status.
Reference range
Standard laboratory reference
3.5 – 5.0 g/dL
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Is generally not clinically concerning in isolation.
Lower
Has been associated with liver disease, kidney disease, or malnutrition in research literature.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Part of standard metabolic panels and used in free testosterone calculation.
Related markers
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.