Serum Amyloid A
Serum amyloid A (SAA) is a protein your liver releases during inflammation. Like CRP, it rises sharply in response to infection, injury, or inflammatory activity.
SAA is a sensitive marker that can climb quickly when inflammation is present, sometimes even earlier than other markers. It is used in some settings to help detect or monitor inflammatory activity. Because many conditions raise it, it is most useful when interpreted alongside your other results.
A high SAA suggests active inflammation, which may stem from infection, tissue injury, or a chronic inflammatory condition. It is non-specific, so it points to inflammation rather than to a particular diagnosis. Persistently high levels can be relevant in certain conditions your clinician may investigate further.
A low SAA generally indicates little detectable inflammation, which is typically reassuring.
A low, normal-range value is expected when there is no active inflammation. Your clinician will interpret your result in the context of why it was measured.
Sources
Educational context only, not medical advice or a diagnosis. Reference ranges vary by lab, age and sex; always discuss your results with a clinician.