Lipid Profile (Cholesterol) Testing Explained
Cholesterol testing plays an important role in assessing cardiovascular risk and is widely used across the NHS and primary care. A lipid profile measures different types of fats (lipids) in the blood, helping clinicians understand how cholesterol may contribute to future heart and circulatory disease risk when considered alongside other factors.
Below, we explain what a lipid profile includes, how it is used in NHS practice, and what current NICE guidance says about cholesterol testing.
What Is a Lipid Profile?
A lipid profile (sometimes called a cholesterol test) typically measures:
Total cholesterol
HDL cholesterol (so-called “good” cholesterol)
Non-HDL cholesterol (total cholesterol minus HDL)
Triglycerides (in certain situations)
Rather than focusing on a single number, clinicians assess the overall lipid pattern and interpret results alongside age, sex, blood pressure, smoking status, and medical history.
What NICE Says About Cholesterol Testing
The key NICE guideline is:
NICE CG181 Cardiovascular disease: risk assessment and reduction, including lipid modification
https://www.nice.org.uk/guidance/cg181
NICE recommends lipid testing as part of cardiovascular risk assessment, particularly for adults aged 40 and over, or those with risk factors such as:
Family history of cardiovascular disease
High blood pressure
Diabetes
Obesity
Smoking
Importantly, NICE states that non-HDL cholesterol is an appropriate and often preferred marker for assessing cardiovascular risk, rather than relying on LDL cholesterol alone.
NICE guidance emphasises that lipid results should not be interpreted in isolation, but used as part of an overall risk assessment (for example, using tools such as QRISK).
How the NHS Uses Lipid Profile Testing
Within the NHS, lipid profile testing is routinely used for:
NHS Health Checks (offered to adults aged 40–74)
Assessing future cardiovascular risk
Monitoring cholesterol levels over time
Supporting discussions around lifestyle or treatment options
The NHS does not use cholesterol tests to diagnose heart disease on their own. Instead, results help estimate future risk and guide appropriate next steps.
More information can be found on the NHS website:
https://www.nhs.uk/conditions/high-cholesterol/
Why Different Cholesterol Markers Matter
Total cholesterol gives an overall picture but is not used alone
HDL cholesterol helps remove excess cholesterol from the bloodstream
Non-HDL cholesterol represents cholesterol that may contribute to plaque formation
Triglycerides can provide additional information in certain metabolic contexts
Together, these markers help build a clearer picture of lipid balance — without over-interpretation.
What a Lipid Profile Can and Can’t Tell You
This test can help:
Understand your cholesterol levels at a point in time
Contribute to cardiovascular risk assessment
Support informed discussions with a GP or healthcare professional
Monitor changes over time
This test cannot:
Diagnose heart disease on its own
Predict individual outcomes
Replace clinical assessment or medical advice
When Might Cholesterol Testing Be Considered?
According to NICE and NHS practice, cholesterol testing may be appropriate if you:
Are aged 40 or over
Have a family history of heart or circulatory disease
Have diabetes or high blood pressure
Are making lifestyle changes and want to monitor cholesterol over time
Testing is most useful when results are interpreted in context.
Next Steps After Testing
If your lipid results fall outside typical reference ranges, it’s recommended to discuss them with a healthcare professional. They can interpret results alongside your personal risk factors and advise on whether further assessment or follow-up is appropriate.
NICE guidance supports repeat testing where clinically indicated, particularly to monitor changes over time rather than making decisions based on a single result.
References & Further Reading
NICE CG181 Cardiovascular disease: risk assessment and lipid modification
https://www.nice.org.uk/guidance/cg181
NHS High cholesterol overview
https://www.nhs.uk/conditions/high-cholesterol/