Apolipoprotein A1, or ApoA1, is the main protein in HDL, the particle that collects extra cholesterol and carries it back to the liver. A low level is linked with higher heart disease risk, and it's often read with ApoB to see the balance between particles that deposit cholesterol and those that clear it. Women have a lab range of 1.01 to 1.98 g/L, and we like to see above 1.4 g/L. In men the range is 0.94 to 1.76 g/L, with above 1.2 g/L as our goal. ApoA1 is part of the Vively Full Body Health Check, $499 including your Baseline, with no Medicare rebate for this marker.
ApoA1 is included in Vively's Full Body Health Check, alongside ApoB and the ApoB/ApoA1 ratio. You start with your Baseline Health Check, and the Full Body Health Check adds these deeper heart markers.
Every marker in range? Get your $99 back. T&Cs apply.Want to save 25%? Try our 4-Month Reset insteadApolipoprotein A1 (ApoA1) is the main protein in HDL particles, the "good cholesterol" carriers in your blood. It gives each HDL particle its structure and helps it pick up spare cholesterol from tissues, including artery walls, and carry it back to the liver for removal. An ApoA1 blood test measures it in grams per litre (g/L).
Your liver and gut make ApoA1. Fresh ApoA1 starts as a small, cholesterol-poor particle. As it collects cholesterol from cells, it activates an enzyme that packs that cholesterol inside, and the particle grows into a mature HDL particle. This return trip is called reverse cholesterol transport.
ApoA1 and HDL cholesterol are related but not the same. HDL cholesterol measures the cholesterol cargo inside HDL particles, in mmol/L. ApoA1 measures the protein that builds them, so it sits closer to the number of HDL particles you have.
An apolipoprotein A1 test shows how well-equipped your body is to clear cholesterol, and low levels are linked with higher risk of heart attack and stroke. It is most informative read against ApoB.
Every LDL and related particle that can build plaque carries one ApoB protein. HDL particles carry ApoA1. The ApoB/ApoA1 ratio compares the two and shows whether the balance tips towards depositing cholesterol or clearing it. In the AMORIS study of more than 175,000 Swedish adults, and the INTERHEART study across 52 countries, the ApoB/ApoA1 ratio was one of the strongest lipid predictors of heart attack.
Our Medical Director, Dr Michelle Woolhouse, notes that the ApoB/ApoA1 ratio holds up in people with or without existing heart disease, and may be better than a standard lipid profile at detecting cardiovascular risk. Normal does not always mean optimal: an ApoA1 near the bottom of the lab range, with ApoB near the top, is a pattern worth acting on even when each number passes on its own.
For adults, ApoA1 is usually about 0.94 to 1.76 g/L in men and 1.01 to 1.98 g/L in women.
| Range | |
|---|---|
| Typical lab reference range (men) | 0.94 to 1.76 g/L |
| Typical lab reference range (women) | 1.01 to 1.98 g/L |
| Vively optimal range (men) | Above 1.2 g/L |
| Vively optimal range (women) | Above 1.4 g/L |
Women usually run higher because oestrogen increases ApoA1. Each lab sets its own reference range, so check the range printed on your report. Optimal ranges are what we aim for to support long-term heart health. They are not diagnostic cut-offs, and there is no extra benefit in pushing ApoA1 far above the top of the range.
High ApoA1 is usually harmless and often reflects oestrogen, regular exercise or your genes. It doesn't need treatment.
Common reasons include the combined oral contraceptive pill, menopausal hormone therapy, pregnancy, regular aerobic exercise, weight loss once your weight has settled, and regular alcohol intake. Some cholesterol medicines raise it slightly. Some families run high HDL.
Higher is not always better. Two large Danish population studies found that people with extremely high HDL cholesterol had higher mortality than people with moderately high levels (Madsen et al., 2017). Trials of medicines that raise HDL, such as niacin, have largely failed to reduce heart attacks. So a very high ApoA1 is not a reason to ignore a high ApoB or LDL.
Low ApoA1 most often goes with insulin resistance, high triglycerides, smoking or low activity, and it is linked with higher cardiovascular risk. It usually tracks with low HDL cholesterol.
Common, everyday reasons:
Medical causes a doctor will think about:
Do you need to fast? No. ApoA1 changes little after a meal, but you'll fast overnight anyway, because the Full Body Health Check includes fasting glucose and insulin.
Things that can shift your result:
Your ApoA1 result means most next to ApoB, triglycerides and your other lipids.
| Pattern | What it can mean |
|---|---|
| Low ApoA1, high ApoB (ApoB/ApoA1 ratio above our optimal of 0.7) | The balance is tipped towards particles that build plaque. Needs attention. |
| Low ApoA1, high triglycerides, high fasting insulin | A typical insulin resistance pattern. Lifestyle change often moves all three. |
| High ApoA1, high ApoB or LDL | A high ApoA1 doesn't cancel out high ApoB. ApoB still needs attention. |
| Normal ApoA1 and ApoB, high lipoprotein(a) | An inherited risk factor that ApoA1 doesn't offset. Needs GP review. |
| Low ApoA1, raised hs-CRP | Inflammation may be lowering ApoA1. Retest once well. |
ApoA1 responds to the same habits that raise HDL and lower triglycerides. Changes are usually modest, and genetics set much of your starting point.
See your GP if your ApoA1 is below the lab range (under 0.94 g/L in men or 1.01 g/L in women), especially with a high ApoB, high LDL or high lipoprotein(a), or if you have a family history of early heart disease.
Also book in if your ApoA1 and HDL cholesterol are both extremely low, as this can point to liver disease or, rarely, an inherited condition. Chest pain, pressure or shortness of breath is never something to wait on: call 000.
ApoA1 is included in Vively's Full Body Health Check, which combines your Baseline Health Check with a Deep Dive layer that adds ApoB, ApoA1, the ApoB/ApoA1 ratio and hormone markers.
We arrange your referral through our GP network, and you have one blood draw at one of 3,700+ accredited partner collection centres. Results arrive in the app, usually within a few days, read against optimal ranges. Your practitioner walks you through your lipid pattern, we build a personalised plan around it, and you retest to see what's changing. Exact markers can depend on the referring doctor's review.
Order ApoA1 and ApoB in the Full Body Health Check.
No, ApoA1 doesn't need fasting on its own, as it changes very little after a meal. Vively's Full Body Health Check includes fasting markers such as glucose and insulin, so you'll fast for 8 to 12 hours before your blood draw, with water only.
ApoA1 is the protein that builds HDL particles, measured in g/L. HDL cholesterol is the cholesterol carried inside those particles, measured in mmol/L. They usually move together, but ApoA1 sits closer to the number of HDL particles, and it is the figure used in the ApoB/ApoA1 ratio.
It is at the bottom of the lab range for men (0.94 to 1.76 g/L) and just below it for women (1.01 to 1.98 g/L). For both sexes it is under the Vively optimal range, which is above 1.2 g/L for men and above 1.4 g/L for women. A low ApoA1 often goes with low HDL and high triglycerides. It is worth checking your ApoB, triglycerides and fasting insulin, and talking to your GP if your ApoB or LDL is also high.
No. High ApoA1 is usually harmless, but very high HDL and ApoA1 levels don't give extra protection, and some studies link extremely high HDL with worse outcomes. A high ApoA1 also doesn't cancel out a high ApoB or LDL, so we always read them together.
Lower is better. The Vively optimal range is below 0.7, though labs and studies use slightly different cut-offs. A higher ratio means more plaque-building particles compared with cholesterol-clearing ones. Your practitioner reads it with your LDL, lipoprotein(a), blood pressure and family history to judge your total risk.
Many blood tests can be Medicare-funded when a doctor orders them for a clinical reason. With Vively, ApoA1 is part of the Full Body Health Check, and we arrange the referral through our GP network, so you don't need a separate GP visit first.
How to get it: Available as one of our specialty add-on tests. See how a blood test without a referral works.
Add-on test: ApoB and ApoA1 Test
Related tests: Apolipoprotein B, Atherogenic Index of Plasma (AIP), ApoB/ApoA1 Ratio, ALT/TG (Alanine Aminotransferase / Triglycerides) Ratio
The Baseline Health Check reads 70+ markers, then your dietitian turns your results into a plan. $99 a month, first test included.
Every marker in range? Get your $99 back. T&Cs apply.