Understanding Your Total Cholesterol Blood Test
A total cholesterol blood test is a routine screening that measures the overall level of cholesterol circulating in your bloodstream. It typically forms part of a lipid profile and reports a combined figure encompassing LDL cholesterol, HDL cholesterol, and a proportion of triglycerides. In the UK, results are measured in millimoles per litre (mmol/L), and the test is widely used as a key indicator of cardiovascular risk.
At Walk In Clinic London, we offer cholesterol blood testing as part of our screening services — with results typically available within a few working days from our convenient central London location.
What Does a Total Cholesterol Test Measure?
Cholesterol is a waxy, fat-like substance produced naturally by the liver and also obtained through certain foods. A total cholesterol blood test provides a single combined reading of:
- LDL cholesterol – often referred to as "bad" cholesterol
- HDL cholesterol – sometimes called "good" cholesterol
- A portion of triglycerides – another type of fat in the blood
Practical Insight: A total cholesterol number on its own provides a useful starting point, but the ratio between HDL, LDL, and triglycerides can offer a more complete picture. Our clinical guide to lipid blood test interpretation explains this in more detail.
What Do Cholesterol Levels Mean? A UK Reference Guide
| Marker | Desirable Level (mmol/L) | Borderline / Elevated | Higher Risk |
|---|---|---|---|
| Total Cholesterol | Below 5.0 | 5.0 – 6.2 | Above 6.2 |
| LDL Cholesterol | Below 3.0 | 3.0 – 4.1 | Above 4.1 |
| HDL Cholesterol | Above 1.2 (women) / 1.0 (men) | 1.0 – 1.2 | Below 1.0 |
| Triglycerides | Below 1.7 | 1.7 – 2.3 | Above 2.3 |
| Total Cholesterol : HDL Ratio | Below 4.0 | 4.0 – 6.0 | Above 6.0 |
Source: UK clinical guidelines including NICE lipid modification guidance (CG181). Figures are for general educational reference only.
Who Should Consider a Cholesterol Blood Test?
You may wish to consider a cholesterol blood test if:
- You are over 40 and have not had a recent lipid check
- There is a family history of high cholesterol or cardiovascular conditions
- You have lifestyle factors you would like to monitor
- You have previously received a borderline or elevated reading
- You are making proactive health changes and want a baseline measurement — a platinum blood test can provide a wider overview alongside cholesterol
- You would prefer not to wait for an NHS appointment
NHS Cholesterol Testing vs Private Cholesterol Screening in London
| Factor | NHS Health Check | Private Cholesterol Blood Test |
|---|---|---|
| Eligibility | Typically ages 40–74, every 5 years | Available to anyone, any age |
| Waiting Time | May require booking weeks in advance | Walk-in or same-day availability |
| Cost | Free at point of access | Fee applies |
| Location | Local GP surgery | Convenient central London |
Frequently Asked Questions
What is a total cholesterol blood test?
A total cholesterol blood test measures the combined level of LDL cholesterol, HDL cholesterol, and a portion of triglycerides in your blood. It is expressed in mmol/L in the UK and serves as an initial indicator of cardiovascular health.
What is a healthy total cholesterol level in the UK?
In the UK, a total cholesterol level below 5.0 mmol/L is generally considered desirable for most adults.
Can I get a cholesterol blood test without seeing a GP?
Yes. At Walk In Clinic London, you can access a cholesterol blood test on a walk-in basis without a GP referral.
Do I need to fast before a cholesterol blood test?
A full fasting lipid profile usually requires 9–12 hours of fasting, whereas a non-fasting total cholesterol test may not require any preparation. Read our guide on fasting before a blood test for more details.
What causes high cholesterol?
High cholesterol can be influenced by a range of factors including diet, physical activity levels, body weight, age, and genetics.
Medical Disclaimer
This article has been produced for educational and informational purposes only. It does not constitute medical advice, diagnosis, or treatment. Walk In Clinic London provides testing and reporting services only.
Written Date: 20 March 2026
Next Review Date: 20 March 2027
