Definition
What ApoA1 measures
Apolipoprotein A1 is the primary structural protein on HDL particles. It is a count of the return-path particles rather than the cholesterol those particles carry.
Illustrative sample band · Synthetic
145mg/dL
92Sample target 120–180 mg/dL208
Why it matters
How clinicians usually read it
Read next to ApoB, it shows the balance between atherogenic particles and HDL particles. SiPhox and many clinic panels report both so the ApoB/ApoA1 ratio has a measured denominator.
When it reads low
A lower value can mean
A lower ApoA1 often travels with low HDL and an insulin-resistance pattern. It is context for the lipid panel, not a stand-alone diagnosis.
When it reads high
A higher value can mean
A higher ApoA1 usually means more HDL particles in circulation. Very high values still do not override an elevated ApoB or Lp(a).
Questions for a clinician
Bring the number into a real conversation
01
How should ApoA1 be read next to my HDL and ApoB?
02
Does the ApoB/ApoA1 ratio change anything ApoB alone does not?
03
Is this a number you would track on the next draw?
Educational boundary
Educational information only. Displayed ranges are illustrative sample bands, not a diagnosis, treatment plan, or substitute for the contracted laboratory report and a qualified clinician.
See it as a sample result
The sample dashboard shows an illustrative reading, target band, and trend for ApoA1.