Research reference only. BioConst updates and corrects content over time, but it cannot replace clinician-guided diagnosis, treatment, medication, or testing decisions.

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Complement C3 / C4

Complement-system protein markers connected to immune-complex, inflammation, infection-defense, and kidney context.

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What it is

Complement tests measure proteins in the complement immune system, including C3 and C4 in some contexts.^[1,2]

Why it matters

Complement connects infection defense, immune-complex disease context, inflammation, kidney context, and autoimmune evaluation.^[1,2]

What it affects

It can bridge immune and kidney domains.^[1,2]
It is a system activity clue, not a standalone diagnosis.^[1,2]

Interpretation traps

Different complement tests answer different questions.^[1,2]
BioConst does not diagnose autoimmune or kidney disease from complement results.^[1,2]