Short answer: an Australian lipid panel usually reports total cholesterol, LDL cholesterol, HDL cholesterol, triglycerides and non-HDL cholesterol in mmol/L. Enhanced athletes should read the pattern, not only the HDL value, and consider ApoB when particle number may add useful information.
A laboratory flag is not a diagnosis, and a result inside the reference range is not a guarantee of low cardiovascular risk. The report must be interpreted with blood pressure, smoking, diabetes, kidney health, family history, medicines and anabolic-androgenic steroid (AAS) or other PED exposure.
Key takeaway: keep the complete report and compare like with like. A single screenshot without units, fasting status, previous results or clinical context is not enough for a safe interpretation.
Table of contents
- What is on a lipid-panel report?
- Australian units and why conversions matter
- Total cholesterol
- LDL cholesterol and calculated values
- HDL cholesterol
- Triglycerides
- Non-HDL cholesterol
- ApoB and discordance
- Lipoprotein(a)
- Fasting versus non-fasting tests
- How to compare serial results
- What AAS changes can look like
- Questions to ask your GP
- Frequently asked questions
- References
What is on a lipid-panel report?
| Marker | What the report measures | Common misunderstanding |
|---|---|---|
| Total cholesterol | Cholesterol carried across the major lipoprotein classes | One total can hide very different LDL, HDL and triglyceride patterns |
| LDL-C | Cholesterol carried in LDL particles | It does not directly count the particles |
| HDL-C | Cholesterol carried in HDL particles | A high result does not cancel high LDL-C or ApoB |
| Triglycerides | A circulating form of stored energy | Recent meals, alcohol and energy balance can change the result |
| Non-HDL-C | Total cholesterol minus HDL-C | It is not the same as LDL-C, because it includes other atherogenic cholesterol |
Read cholesterol explained for athletes for the underlying biology. This page focuses on navigating the actual pathology report.
Australian units and why conversions matter
Australian laboratories generally report cholesterol and triglycerides in millimoles per litre, written mmol/L. American articles and social posts often use milligrams per decilitre, or mg/dL.
Do not compare the raw numbers across unit systems. Cholesterol and triglycerides also use different conversion factors. Use the units printed on the report and let a validated clinical calculator or clinician perform any conversion.
Reference intervals and treatment targets are also different concepts. Laboratory intervals can vary, while a clinician may set a lower LDL-C or non-HDL-C goal for someone at higher cardiovascular risk.
Total cholesterol
Total cholesterol is easy to quote and easy to misread. It includes cholesterol carried in LDL, HDL and other particles. Two athletes with the same total can have very different risk-relevant patterns.
Example:
- Athlete A may have higher LDL-C and average HDL-C.
- Athlete B may have lower LDL-C and higher HDL-C.
The same total does not make those patterns equivalent. Start with the individual components and total risk rather than using total cholesterol alone.
LDL cholesterol and calculated values
LDL-C estimates the amount of cholesterol carried inside LDL particles. It is a major treatment target because cumulative exposure to atherogenic particles contributes to atherosclerosis.
On many standard panels, LDL-C is calculated rather than directly measured. Common formulae use total cholesterol, HDL-C and triglycerides. Accuracy can decline when triglycerides are high or the lipid pattern is unusual. The report may state that LDL could not be calculated, or the clinician may request direct LDL-C, ApoB or a repeat fasting sample.
A calculated value is still clinically useful; "calculated" does not mean invented. It means the limitations should be recognised.
HDL cholesterol
HDL-C is commonly called good cholesterol because higher values are associated with lower risk in many populations. That label encourages two mistakes:
- assuming that high HDL-C neutralises high LDL-C or ApoB; and
- assuming that anything that raises HDL-C must prevent cardiovascular events.
Neither follows automatically. Very low HDL-C can signal an adverse metabolic or AAS-related pattern, but management should target the cause and overall risk, not one number.
Triglycerides
Triglycerides are affected by recent food intake, alcohol, excess energy, diabetes, insulin resistance, some medicines and genetic conditions. A hard training week does not guarantee a low result.
When triglycerides are high, calculated LDL-C may be less reliable and non-HDL-C or ApoB may become more informative. Very high triglycerides can also raise pancreatitis risk and need prompt clinical management.
Non-HDL cholesterol
Non-HDL-C is calculated by subtracting HDL-C from total cholesterol. It captures cholesterol in LDL and other ApoB-containing particles.
For example, total cholesterol of 5.4 mmol/L minus HDL-C of 1.2 mmol/L gives non-HDL-C of 4.2 mmol/L. Do not subtract LDL-C from total cholesterol and call the remainder non-HDL.
Non-HDL-C can be useful when triglycerides are elevated and can be followed without requiring a separate assay.
ApoB and discordance
Each LDL particle and several other atherogenic particles carries one ApoB molecule. ApoB concentration therefore approximates the number of those particles.
Discordance means cholesterol content and particle number do not point in the same direction. Someone can have an LDL-C that appears moderate but a higher ApoB because they have more cholesterol-depleted particles. The opposite pattern can also occur.
ApoB is often useful when triglycerides, diabetes, obesity, metabolic syndrome or unusual lipid patterns complicate LDL-C interpretation. It is not required for every person and should not be ordered without a clinical question.
Lipoprotein(a)
Lp(a) is an LDL-like particle with an additional apolipoprotein(a) component. Its concentration is largely inherited and remains relatively stable. A high level can add cardiovascular risk that is not visible on the standard panel.
Many current guidelines support measuring Lp(a) at least once in adulthood, particularly with premature cardiovascular disease or strong family history. It is not a marker expected to rise and fall with each AAS exposure, and ordinary lifestyle changes have limited effect on its concentration.
Fasting versus non-fasting tests
Many routine lipid panels can be collected without fasting. A fasting test may be requested when:
- triglycerides are high;
- a calculated LDL result is uncertain;
- a genetic lipid disorder is being assessed;
- other fasting tests are ordered; or
- the clinician wants a standardised serial comparison.
Follow the pathology instructions. Do not extend a fast, dehydrate yourself or perform extra cardio to improve the number. The goal is a representative result.
How to compare serial results
For a fair comparison, record:
- fasting or non-fasting status;
- the laboratory and assay where known;
- body mass and major dietary changes;
- alcohol intake;
- acute illness;
- prescribed medicines and adherence;
- AAS, PED and supplement exposure; and
- the dates of exposure changes.
Biological and laboratory variation means a small change may not be meaningful. Look for a sustained direction, a large difference or several related markers moving together. Use the retesting interval set by the clinician.
What AAS changes can look like
AAS can lower HDL-C and increase LDL-C, non-HDL-C and ApoB. Some orally active 17-alpha-alkylated AAS are associated with particularly marked HDL suppression, but injectable exposure is not neutral.
A typical concerning pattern could include:
- a substantial fall in HDL-C from baseline;
- higher LDL-C or non-HDL-C;
- higher ApoB;
- higher triglycerides when diet, alcohol, insulin resistance or other drugs contribute; and
- simultaneous high blood pressure or haematocrit.
The dedicated steroids and cholesterol guide explains the mechanisms and evidence. No supplement normalising one marker makes the exposure safe.
Questions to ask your GP
- Does this result need to be repeated, and should the repeat be fasting?
- What is my LDL-C, non-HDL-C and overall cardiovascular target?
- Would ApoB add useful information?
- Have I had Lp(a) measured once?
- Could thyroid, kidney, liver or glucose health be contributing?
- Could a medicine, AAS or other PED be driving the change?
- Does my family history suggest familial hypercholesterolaemia?
- What lifestyle change is most likely to affect this pattern?
- When is medication appropriate?
- When should I repeat testing?
Bring the complete cardiovascular blood-test guide for enhanced athletes and your actual results, not a retyped summary. For intervention options, see how athletes can improve cholesterol.
Frequently asked questions
What is included in a lipid panel?
Most panels include total cholesterol, LDL-C, HDL-C, triglycerides and non-HDL-C. ApoB and Lp(a) are separate tests when clinically appropriate.
What units does Australia use for cholesterol?
Australian laboratories generally use mmol/L. Do not compare the raw value with American mg/dL content without a correct conversion.
Do I need to fast for a cholesterol test?
Not always. Fasting may be requested for high triglycerides, uncertain calculated LDL-C or a standardised comparison. Follow the pathology instructions.
Is LDL-C measured directly?
It is often calculated from total cholesterol, HDL-C and triglycerides. Direct measurement or ApoB may be considered when the calculation is unreliable.
What is non-HDL cholesterol?
Non-HDL-C is total cholesterol minus HDL-C. It captures cholesterol carried by LDL and other atherogenic particles.
Is ApoB more important than LDL?
ApoB and LDL-C answer related but different questions. ApoB can add particle number information, especially when markers are discordant.
Can high HDL cancel high LDL?
No. A high HDL-C result does not neutralise exposure to LDL and other atherogenic particles.
Can steroids affect a lipid panel?
Yes. AAS can lower HDL-C and raise LDL-C, non-HDL-C and ApoB. The size of the change varies by exposure and person.
How often should enhanced athletes repeat lipids?
There is no universal schedule that makes AAS use safe. Timing depends on baseline risk, exposure, prior results and clinician advice.
References and further reading
- National Heart Foundation of Australia: Manage high blood cholesterol
- National Heart Foundation of Australia: Blood tests for heart disease
- Australian Guideline for Assessing and Managing Cardiovascular Disease Risk
- Cardiovascular Disease in Anabolic Androgenic Steroid Users
This article provides general education and does not interpret an individual pathology result. Discuss lipid testing and treatment decisions with a qualified health professional.