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Educational glossary · non-diagnostic

Testosterone marker glossary

Definitions for common report labels. They are not reference targets, a diagnostic checklist, or personal testing instructions.

Peptide Index does not accept results or identify a diagnosis. A report’s own laboratory, units, collection context, and printed reference interval belong together when a qualified professional reviews it.

Total testosterone
A laboratory measurement that reflects testosterone carried in more than one form in circulation. Official guidance treats the laboratory method, reference interval, collection context, and clinical question as part of the result’s context.
SHBG
Sex hormone-binding globulin is a binding protein. Canadian guidance explains that SHBG can affect how total testosterone is understood and can be included in some laboratory calculations.
Calculated bioavailable testosterone
A calculated laboratory value that can incorporate total testosterone and SHBG. It is a report label, not a universal target or a stand-alone diagnosis.
Calculated free testosterone
A calculated estimate derived from laboratory inputs. The B.C. protocol notes that reporting conventions vary and that calculated measures need the laboratory’s own context.
LH
Luteinizing hormone is a pituitary signaling hormone. Clinical guidelines discuss it as one possible part of professional evaluation after a clinical question has been established.
Prolactin
A pituitary-related hormone that a clinician may consider in specific contexts. Its presence on a report does not explain itself without the wider clinical picture.
Estradiol
A hormone measurement that may be considered in particular clinical contexts. This glossary does not state when testing is appropriate or interpret an individual value.
Hematocrit
A laboratory measure related to the proportion of red blood cells in blood. It may appear in broader clinical assessment, but this page does not provide monitoring or treatment instructions.
PSA
A laboratory marker that clinicians use in defined contexts. Whether it is relevant, and how it is understood, depends on an individual’s clinical situation and professional guidance.

Source and maintenance

This glossary draws its terminology and boundaries from the B.C. Testosterone Testing Protocol. The protocol is written for primary-care practice; this page is a simplified educational reference, not a substitute for it.

Read the B.C. protocol

Last reviewed August 23, 2026.

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