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.
Where does your number land?
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Drag to your own Albumin (for free T calc) result.
Educational only, not a diagnosis. Ranges vary by laboratory. See which panel includes Albumin (for free T calc).
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
Common questions
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.
It's one of the markers used to build a fuller picture of your health. On its own it tells you very little, so it's most informative when reviewed alongside related markers.
It's measured from a standard blood draw at Quest or LabCorp. Albumin (for free T calc) is one of the markers included in the OPTML Apex Panel, where your results are read across systems and reviewed by a U.S.-licensed physician.
Reference ranges vary by laboratory, and a single value rarely tells the whole story. Review your result with a physician in the context of your other markers, symptoms, and history.
Albumin (for free T calc) is one signal among many. Answer a few quick questions and we’ll point you to the panel that fits.
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.
Find the right 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.
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