Which Blood Tests Evaluate Cholesterol and Heart Disease Risk?
Written by YiQiu Hu, NMD
Arizona-licensed naturopathic physician and virtual concierge medicine provider
Published August 2026 | Medically reviewed August 2026
Several blood tests can help evaluate cholesterol and cardiovascular risk. The most common is a lipid panel, which typically measures total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides. Depending on your medical history and overall risk, additional testing such as non-HDL cholesterol, apolipoprotein B (ApoB), lipoprotein(a), or Lp(a), and high-sensitivity C-reactive protein (hs-CRP) may provide useful additional information.
However, no single blood test determines whether you will develop heart disease.
Cholesterol results are most useful when interpreted together with your age, blood pressure, blood sugar, smoking history, kidney health, family history, medications, previous cardiovascular disease, and other risk factors.
For a more detailed explanation of cholesterol results, read Cholesterol and Lipid Testing Explained: What Your Numbers Mean for Heart Health.
What Is the Main Blood Test for Cholesterol?
The standard test is called a lipid panel, sometimes called a cholesterol panel or lipid profile.
A typical lipid panel includes:
Total cholesterol
LDL cholesterol
HDL cholesterol
Triglycerides
Some laboratory reports also provide calculated measurements such as:
Non-HDL cholesterol
VLDL cholesterol
Cholesterol ratios
The American Heart Association recommends cholesterol testing for adults beginning at age 19, with the frequency of future testing individualized according to previous results and cardiovascular risk.
A lipid panel is also one of the most common components of routine laboratory testing.
What Does LDL Cholesterol Measure?
LDL cholesterol, or LDL-C, measures cholesterol carried within low-density lipoproteins.
LDL is often called "bad cholesterol" because LDL-containing particles can contribute to cholesterol deposition within artery walls and the development of atherosclerosis.
In general, higher exposure to LDL over time is associated with greater cardiovascular risk.
However, there is not one LDL goal that is appropriate for everyone.
The 2026 ACC/AHA dyslipidemia guideline once again emphasizes risk-based LDL treatment goals. For example, people at higher cardiovascular risk may have substantially lower LDL goals than people with relatively low risk.
This is why an LDL result should not be interpreted solely according to whether the laboratory places an "H" beside the number.
Your physician needs to determine what that LDL level means for you.
What Does HDL Cholesterol Measure?
HDL cholesterol, or HDL-C, measures cholesterol associated with high-density lipoproteins.
HDL has traditionally been called "good cholesterol" because higher HDL levels have been associated with lower cardiovascular risk in many populations.
However, HDL should not be interpreted as a protective number that cancels out other cardiovascular risks.
For example, having a relatively high HDL does not necessarily eliminate concern about:
High LDL cholesterol
Elevated ApoB
Elevated Lp(a)
Diabetes
High blood pressure
Smoking
Kidney disease
Strong family history
Established atherosclerosis
Current cardiovascular evaluation therefore considers HDL as one part of the overall risk profile rather than treating it as the primary therapeutic target.
Why Are Triglycerides Important?
Triglycerides are another type of fat circulating in the bloodstream.
Elevated triglycerides may occur with conditions or factors such as:
Insulin resistance
Prediabetes or diabetes
Excess body weight
Excess alcohol intake
Certain dietary patterns
Hypothyroidism
Kidney or liver disease
Certain medications
Genetic lipid disorders
Persistent triglyceride elevation can also contribute information about cardiovascular and metabolic risk.
Very high triglyceride levels require additional attention because severe hypertriglyceridemia can also increase the risk of pancreatitis.
A triglyceride result should therefore be interpreted in context rather than considered only as another number on a cholesterol report.
What Is Non-HDL Cholesterol?
Non-HDL cholesterol is calculated by subtracting HDL cholesterol from total cholesterol:
Non-HDL cholesterol = Total cholesterol − HDL cholesterol
Non-HDL cholesterol represents cholesterol carried by multiple types of particles that may contribute to atherosclerosis.
Unlike LDL cholesterol alone, it incorporates cholesterol carried by LDL and other potentially atherogenic particles.
The 2026 ACC/AHA guideline includes non-HDL cholesterol alongside LDL cholesterol when evaluating and managing dyslipidemia.
Your laboratory may calculate non-HDL cholesterol automatically, so no additional blood draw is usually required.
What Is an ApoB Blood Test?
Apolipoprotein B, or ApoB, provides information about the number of atherogenic lipoprotein particles circulating in your blood.
This is different from LDL cholesterol.
LDL-C tells us approximately how much cholesterol is being carried within LDL particles. ApoB provides information related to the number of particles capable of contributing to atherosclerosis.
Two people may therefore have similar LDL cholesterol levels but different ApoB concentrations.
The American Heart Association notes that ApoB testing can be especially helpful in certain people with:
High triglycerides
Type 2 diabetes
Metabolic or cardiovascular-kidney-metabolic conditions
Known cardiovascular disease
Possible residual cardiovascular risk despite apparently controlled LDL cholesterol
ApoB is generally an additional risk-assessment tool, not a replacement for the standard lipid panel.
For patients interested in how these more specialized measurements differ from conventional testing, see Routine Blood Work vs. Specialty Laboratory Testing.
What Is Lipoprotein(a), or Lp(a)?
Lipoprotein(a), usually abbreviated Lp(a), is an especially important cardiovascular risk marker because its concentration is largely determined by genetics.
An elevated Lp(a) can increase cardiovascular risk even when a standard cholesterol panel does not appear particularly concerning.
The 2026 ACC/AHA Guideline on the Management of Dyslipidemia recommends that adults have Lp(a) measured at least once during adulthood.
An Lp(a) concentration of approximately 125 nmol/L or greater or 50 mg/dL or greater is considered a cardiovascular risk-enhancing level in current guidance.
Because Lp(a) is largely genetically determined and tends to remain relatively stable, repeated testing is generally unnecessary for most patients unless there is a specific reason to repeat it.
An elevated Lp(a) does not mean that someone will definitely have a heart attack or stroke.
Instead, it provides additional information that may influence how aggressively other modifiable cardiovascular risk factors are addressed.
What Is an hs-CRP Test?
High-sensitivity C-reactive protein, or hs-CRP, is a blood test that measures low levels of C-reactive protein associated with systemic inflammation.
It is not a cholesterol test.
However, hs-CRP may sometimes be used as an additional cardiovascular risk marker, particularly when a person's overall risk is uncertain.
Current cardiovascular guidance recognizes elevated hs-CRP as one potential risk-enhancing factor. Because many conditions can temporarily increase CRP—including infections and other inflammatory conditions—an elevated result should never automatically be assumed to represent cardiovascular inflammation.
Your physician may recommend repeat testing or evaluation for another source of inflammation before drawing conclusions from an elevated result.
Do Blood Sugar Tests Also Help Evaluate Heart Disease Risk?
Yes, although they do not measure cholesterol.
Tests such as:
Fasting glucose
Hemoglobin A1C
can help identify diabetes, prediabetes, and abnormal glucose regulation.
This matters because diabetes and related cardiometabolic conditions can significantly affect cardiovascular risk and may influence how aggressively cholesterol and other risk factors should be managed.
A comprehensive cardiovascular evaluation therefore often looks at lipid results and blood-sugar measurements together rather than viewing them as unrelated tests.
For a broader explanation of common testing, visit A Patient's Guide to Understanding Blood Work and Laboratory Testing.
Do You Need Every Cardiovascular Blood Test?
No.
A larger laboratory panel is not automatically better.
For many patients, an appropriate evaluation may begin with a standard lipid panel and assessment of traditional cardiovascular risk factors.
Additional testing is most useful when the result could meaningfully improve risk assessment or change what you and your physician decide to do next.
One important exception under current guidance is Lp(a), which is now recommended at least once during adulthood. ApoB and hs-CRP are more selectively used depending on the clinical situation.
Can a Blood Test Tell Whether My Arteries Are Blocked?
No.
Blood tests can identify cardiovascular risk factors, but they do not directly show whether plaque has already accumulated inside your coronary arteries.
When additional risk clarification is needed, physicians may sometimes consider other evaluations.
For example, a coronary artery calcium (CAC) scan is a noncontrast CT scan that detects calcified plaque within the coronary arteries.
The 2026 ACC/AHA guideline supports selective use of CAC testing in certain adults when cardiovascular risk is borderline or intermediate and the result could affect a treatment decision.
A CAC scan is an imaging study—not a blood test—and it is not necessary for every patient.
Do I Need to Fast for Cholesterol Testing?
Not necessarily.
A lipid panel may be performed using either a fasting or non-fasting blood sample, depending on the clinical situation.
Your physician may still request fasting when:
Triglycerides are elevated
A previous result needs clarification
A specific lipid disorder is being evaluated
Other fasting blood tests are being performed at the same time
Always follow the instructions provided for your individual laboratory order rather than assuming every cholesterol test requires fasting.
What Other Factors Determine Heart Disease Risk?
Blood tests provide valuable information, but cardiovascular risk assessment includes considerably more than laboratory testing.
Your physician may consider:
Age
Blood pressure
Smoking or tobacco exposure
Diabetes
Kidney disease
Body weight and metabolic health
Family history of premature cardiovascular disease
Previous heart attack, stroke, or peripheral artery disease
Physical activity
Dietary patterns
Certain inflammatory conditions
Pregnancy and reproductive history when relevant
LDL and non-HDL cholesterol
Triglycerides
Lp(a)
ApoB when appropriate
Other clinically relevant risk-enhancing factors
The 2026 ACC/AHA guideline uses the PREVENT-ASCVD equations as part of cardiovascular risk assessment in appropriate adults rather than making decisions from cholesterol numbers alone.
Frequently Asked Questions
What is the most important blood test for cholesterol?
A standard lipid panel is the usual starting point. It measures total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides.
Additional measurements may provide useful information depending on your overall cardiovascular risk.
Is ApoB better than LDL cholesterol?
Not necessarily.
ApoB and LDL provide different information. LDL-C estimates the amount of cholesterol being carried, while ApoB provides information about the number of atherogenic lipoprotein particles.
ApoB can be particularly helpful when LDL cholesterol may underestimate risk, such as in some people with elevated triglycerides, diabetes, or metabolic disease.
Should everyone have an Lp(a) test?
Current 2026 ACC/AHA guidance recommends measuring Lp(a) at least once during adulthood.
Can cholesterol be normal even if I have heart disease risk?
Yes.
Someone can have cholesterol values that appear relatively reassuring while still having other important risk factors such as high blood pressure, diabetes, smoking, chronic kidney disease, elevated Lp(a), a strong family history, or established arterial plaque.
Does high cholesterol mean I need medication?
Not automatically.
Treatment decisions depend on the degree and pattern of cholesterol abnormalities as well as your overall cardiovascular risk, medical history, previous cardiovascular disease, diabetes, kidney disease, family history, other risk-enhancing factors, and personal circumstances.
The Bottom Line
The primary blood test used to evaluate cholesterol is a standard lipid panel, which includes LDL cholesterol, HDL cholesterol, total cholesterol, and triglycerides.
Additional measurements can provide a more complete cardiovascular assessment in selected situations:
Non-HDL cholesterol reflects cholesterol carried by multiple potentially atherogenic particles.
ApoB provides information about the number of atherogenic lipoprotein particles.
Lp(a) helps identify genetically influenced cardiovascular risk and is now recommended at least once during adulthood.
hs-CRP may provide additional information about inflammatory cardiovascular risk in selected patients.
Glucose and A1C help identify cardiometabolic risk associated with abnormal blood-sugar regulation.
The goal is not to order every cardiovascular test available.
The goal is to choose the tests that meaningfully clarify your risk and then interpret those results alongside your complete health history.
For a deeper explanation of lipid testing, read Cholesterol and Lipid Testing Explained: What Your Numbers Mean for Heart Health, or explore the Routine Laboratory Testing Resource Center.
Evidence-Informed Medical Education
This article reflects current cardiovascular guidance and is intended to help patients understand how laboratory testing contributes to cardiovascular risk assessment.
Key medical resources include:
American Heart Association: How to Get Your Cholesterol Tested
American Heart Association: High-Sensitivity C-Reactive Protein
American Heart Association PREVENT Cardiovascular Risk Calculator
Medical recommendations continue to evolve, and laboratory testing should be individualized according to your medical history, symptoms, medications, risk factors, previous results, and overall health.
About the Author
YiQiu Hu, NMD is an Arizona-licensed naturopathic physician and founder of Ask Dr. Hu. His clinical work includes concierge medicine, preventive healthcare, health optimization, laboratory evaluation, medical weight management, hormone care, and individualized treatment planning for patients throughout Arizona.
Dr. Hu's approach emphasizes careful interpretation of laboratory results within the context of each patient's medical history, risk factors, medications, lifestyle, and long-term health goals.
Learn more about Dr. YiQiu Hu and the physicians at Ask Dr. Hu.
Information on this page is provided for general educational purposes and does not replace individualized medical advice, diagnosis, or treatment. Reading this article does not establish a physician-patient relationship.