Short answer: training does not make an abnormal cholesterol result irrelevant. A standard lipid panel usually reports total cholesterol, LDL cholesterol, HDL cholesterol, triglycerides and non-HDL cholesterol. These values describe different parts of lipoprotein metabolism, and they should be interpreted alongside blood pressure, smoking, diabetes, kidney health, family history and overall cardiovascular risk.
For enhanced athletes, anabolic-androgenic steroids (AAS) can produce an especially concerning pattern: HDL may fall while LDL and apolipoprotein B (ApoB) rise. Feeling fit, having visible abs or completing regular cardio does not prove that this exposure is harmless.
Key takeaway: cholesterol is not a score where one high "good" number cancels a high "bad" number. Look at the full pattern, repeat unexpected results under comparable conditions and make decisions with a qualified health professional.
Table of contents
- What cholesterol is
- Cholesterol versus lipoproteins
- What a standard lipid panel measures
- LDL cholesterol
- HDL cholesterol
- Triglycerides
- Non-HDL cholesterol
- ApoB and particle number
- Lipoprotein(a)
- Why athletes can still have an adverse result
- AAS and cholesterol
- How to prepare for a lipid test
- Evidence-based next steps
- Where supplements fit
- Frequently asked questions
- References
What cholesterol is
Cholesterol is a waxy substance used to build cell membranes, steroid hormones and bile acids. Your liver produces cholesterol, and diet contributes a smaller, variable amount. Cholesterol is essential; the problem is not its mere presence but how cholesterol-containing particles circulate and contribute to plaque in artery walls over time.
Because fat does not dissolve freely in blood, cholesterol and triglycerides travel inside particles called lipoproteins. This is why a lipid report contains several numbers rather than one universal cholesterol score.
Cholesterol versus lipoproteins
People often use "LDL" and "cholesterol" as if they mean the same thing. Strictly, LDL is a lipoprotein particle and LDL-C is the amount of cholesterol carried within LDL particles. HDL-C is the cholesterol carried within high-density lipoproteins.
This distinction matters because two people can have a similar LDL-C value but a different number of atherogenic particles. ApoB is one way to estimate the number of particles capable of entering the artery wall. A standard lipid panel remains useful, but additional tests can sometimes refine risk.
What a standard lipid panel measures
| Marker | What it broadly reflects | Important limitation |
|---|---|---|
| Total cholesterol | Cholesterol carried across the major lipoprotein classes | Can hide very different LDL, HDL and triglyceride patterns |
| LDL-C | Cholesterol carried in LDL particles | Does not directly count particle number |
| HDL-C | Cholesterol carried in HDL particles | A high value does not automatically neutralise LDL-related risk |
| Triglycerides | A circulating form of stored energy | Can change with meals, alcohol, illness and recent energy intake |
| Non-HDL-C | Total cholesterol minus HDL-C | Still measures cholesterol content rather than exact particle number |
Australian laboratories usually report lipids in mmol/L. Avoid comparing those values directly with American content using mg/dL unless they have been correctly converted. More importantly, do not copy a target from someone else's report. Treatment goals depend on total cardiovascular risk and whether established cardiovascular disease, diabetes, kidney disease or other major risk factors are present.
LDL cholesterol
LDL particles transport cholesterol from the liver to tissues. When the number of atherogenic particles is elevated over time, more particles can enter the artery wall, become retained and contribute to atherosclerotic plaque. This is why LDL-C is commonly called "bad cholesterol", although the particle has normal physiological functions.
LDL-C is an established treatment target because lowering LDL with therapies that have strong outcome evidence reduces cardiovascular events in appropriate patients. The size of benefit depends on baseline risk, degree of LDL reduction and duration.
A low triglyceride level, high fitness or high HDL-C does not make a markedly elevated LDL-C automatically benign. Athletes following a very-low-carbohydrate, high-saturated-fat diet can sometimes develop substantial LDL increases. The long-term significance should be assessed rather than dismissed because other markers look favourable.
HDL cholesterol
HDL participates in cholesterol transport and several other biological processes. Higher HDL-C is often associated with lower cardiovascular risk in population studies, which led to the label "good cholesterol". Association, however, does not mean that deliberately raising HDL-C with any intervention will necessarily prevent heart attacks.
HDL-C is best treated as part of the overall pattern. Very low HDL can be a warning sign, particularly when it appears with high triglycerides, insulin resistance, smoking or AAS exposure. A high HDL value should not be used to cancel high LDL-C, non-HDL-C or ApoB.
Triglycerides
Triglycerides store and transport energy. Levels can rise with excess energy intake, alcohol, poorly controlled diabetes, some medicines, genetic conditions and diets high in refined carbohydrate or saturated fat. Recent food intake can also affect the result.
High triglycerides often occur with low HDL-C and other metabolic risk factors. Very high levels can also increase the risk of acute pancreatitis, which is a different concern from long-term atherosclerotic risk and needs timely medical management.
Endurance or resistance training often supports triglyceride control, but an athlete can still have high values. Look at alcohol, current calorie intake, glycaemic health, thyroid and kidney function, medicines and family history rather than assuming more exercise is the only answer.
Non-HDL cholesterol
Non-HDL-C is calculated by subtracting HDL-C from total cholesterol. It captures cholesterol carried by LDL and other atherogenic particles. It is useful because it does not depend on fasting in the same way that triglyceride-sensitive LDL calculations can, and it can provide a broader view when triglycerides are elevated.
Example: if total cholesterol is 5.5 mmol/L and HDL-C is 1.3 mmol/L, non-HDL-C is 4.2 mmol/L. This calculation does not diagnose a condition; it is one marker for the clinician to interpret in context.
ApoB and particle number
Each LDL particle and several other atherogenic lipoprotein particles carries one ApoB molecule. Measuring ApoB therefore approximates the total number of atherogenic particles. It can be particularly useful when LDL-C and triglycerides do not tell a consistent story, or when metabolic risk is present.
ApoB is not a replacement for every other marker and is not always required. Its value depends on the clinical question. The planned FITCNT ApoB explained for athletes guide will cover discordance, limitations and discussion points in detail.
Lipoprotein(a)
Lipoprotein(a), written Lp(a), is an LDL-like particle whose level is largely genetically determined. A high Lp(a) can add cardiovascular risk even when standard cholesterol results look acceptable. Lifestyle has limited influence on the concentration, so testing is mainly about identifying inherited risk and managing all modifiable factors appropriately.
Many contemporary guidelines recommend measuring Lp(a) at least once in adulthood, particularly when there is premature cardiovascular disease or a strong family history. Availability and interpretation should be discussed with a clinician.
Why athletes can still have an adverse result
Exercise is beneficial, but cholesterol is influenced by more than training. Possible contributors include:
- genetic conditions such as familial hypercholesterolaemia;
- a dietary pattern high in saturated fat despite being minimally processed;
- very-low-carbohydrate or ketogenic diets in susceptible individuals;
- rapid weight gain during a mass phase;
- alcohol and excess energy intake;
- diabetes, insulin resistance, thyroid, liver or kidney conditions;
- medicines and performance-enhancing drugs; and
- age and family history.
"I train six days a week" is useful context, but it is not a biological explanation for every result. Likewise, a single unusual panel may be influenced by illness, a major dietary change or laboratory variation. Confirm the result without rationalising it away.
AAS and cholesterol
AAS can adversely change lipids, often lowering HDL-C and raising LDL-C and ApoB. The size of the change varies with the compound, route, dose, duration, genetics and other exposures. Orally administered 17-alpha-alkylated AAS are often associated with particularly marked HDL suppression, but injectable use is not cardiovascularly neutral.
Prospective and observational research in AAS users has also identified changes beyond the lipid panel, including blood pressure, heart structure and function, coronary plaque and cardiovascular events. Lipids should therefore be treated as one part of monitoring, not the only pass-fail test.
Read the dedicated steroids and cholesterol guide for exposure-specific detail. The complete heart-health guide for enhanced athletes explains how lipids connect with blood pressure, haematocrit, symptoms and cardiac evaluation.
How to prepare for a lipid test
Many lipid tests can be performed without fasting, but fasting may be requested when triglycerides are high, a calculated LDL value is uncertain or the clinician wants a standardised comparison. Follow the pathology request rather than inventing your own protocol.
For a useful repeat comparison:
- use the same fasting or non-fasting state when possible;
- avoid testing during acute illness unless the result is urgently needed;
- tell the clinician about major dietary, body-weight or medicine changes;
- report AAS, PED, alcohol and supplement exposure honestly;
- do not stop prescribed medicine before testing unless instructed; and
- avoid using one post-cycle or short-term result as proof of long-term safety.
The existing enhanced-athlete lipid-panel guide is being expanded to cover report interpretation and useful follow-up questions.
Evidence-based next steps
Assess total risk
A GP can combine the lipid pattern with blood pressure, age, smoking, diabetes, kidney health and family history. The Australian cardiovascular disease risk guideline is designed for this broader assessment. Younger enhanced athletes may still need individual review even when a short-term risk calculator appears low, because calculators may not capture AAS exposure or lifetime particle burden.
Adjust dietary fat quality
Replace rather than merely add. Swapping some butter, coconut fat, fatty processed meat and high-saturated-fat discretionary foods for nuts, seeds, extra virgin olive oil, avocado, legumes, fish and other unsaturated-fat sources can support LDL management. The effect depends on the starting diet and replacement food.
Increase soluble fibre and consider plant sterols
Oats, barley, legumes, fruit, vegetables and psyllium provide soluble fibre. Plant sterol-enriched foods can modestly lower LDL-C. These are adjuncts to an overall heart-healthy eating pattern, not compensation for an otherwise adverse diet.
Keep aerobic and resistance training
Both forms of exercise support cardiovascular and metabolic health. Exercise often has a stronger effect on triglycerides, fitness and blood pressure than on a genetically high LDL-C value. Do not interpret a modest LDL response as evidence that training is pointless.
Address alcohol, smoking, sleep and body mass
Alcohol can raise triglycerides and blood pressure. Smoking materially increases cardiovascular risk. Sleep apnoea and rapid weight gain can add further risk even when the weight gain includes muscle.
Use medicine when it is indicated
Statins and other lipid-lowering medicines have a much stronger evidence base for reducing cardiovascular events in appropriate patients than supplements do. Do not stop or reduce prescribed treatment because one lifestyle change or supplement improved a marker.
Where supplements fit
Some ingredients can modestly influence selected lipid markers. Soluble fibre and plant sterols have relatively established LDL-lowering roles. Prescription omega-3 products can lower triglycerides in defined clinical settings, but over-the-counter fish oil is not automatically equivalent and may increase LDL in some people.
Citrus bergamot and pantethine have produced promising results in human trials, but studies are generally smaller, shorter and more heterogeneous than the evidence supporting established medicines. CoQ10 is not an LDL-lowering substitute. Curcumin and other antioxidants should not be described as preventing atherosclerosis on the basis of biomarker studies.
The best heart-support supplements Australia guide compares these categories and their limitations. No supplement can be relied on to neutralise AAS-related dyslipidaemia.
Frequently asked questions
Can athletes have high cholesterol?
Yes. Genetics, diet, age, health conditions, medicines and PED exposure can affect lipids regardless of fitness or body composition.
Is HDL the good cholesterol?
HDL-C is associated with cardiovascular risk, but a high HDL value does not cancel high LDL-C, non-HDL-C or ApoB. The full pattern matters.
Is LDL always bad?
LDL particles have normal transport functions, but greater exposure to atherogenic particles over time contributes to atherosclerosis. LDL-C is an important, modifiable risk marker.
What is non-HDL cholesterol?
Non-HDL-C is total cholesterol minus HDL-C. It estimates cholesterol carried across LDL and other atherogenic particles.
What is ApoB?
ApoB is a protein found one per LDL and several other atherogenic particles. Its concentration approximates the total number of those particles.
Should athletes test lipoprotein(a)?
Many contemporary guidelines support at least one adult Lp(a) measurement, especially with premature cardiovascular disease or strong family history. Discuss access and interpretation with a clinician.
Do steroids lower HDL cholesterol?
AAS can markedly lower HDL-C and may raise LDL-C and ApoB. The response varies, but a favourable result at one point does not prove the exposure is safe.
Can cardio fix high LDL?
Exercise supports overall cardiovascular health and often improves triglycerides, but it may not normalise genetically or diet-related high LDL. Dietary and medical treatment may still be needed.
Can supplements replace statins?
No supplement should be presented as a general replacement for prescribed statin treatment. Discuss goals, side effects and alternatives with the prescriber rather than stopping treatment independently.
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
- Cardiovascular phenotype of long-term AAS users compared with strength-trained athletes
- Cardiovascular Toxicity of Illicit Anabolic-Androgenic Steroid Use
This article provides general education and does not interpret an individual pathology result. Discuss lipid testing, treatment targets and medicine decisions with a qualified health professional.