Cholesterol has a bad reputation, but your body genuinely needs it — to build cells, make hormones and produce vitamin D. The important distinction is not cholesterol versus no cholesterol, but which kind you have and in what balance. That is where HDL and LDL come in.
What HDL and LDL actually are
Cholesterol does not dissolve in blood, so it travels wrapped in protein packages called lipoproteins. The two you hear about most are:
- LDL (low-density lipoprotein) — often called "bad" cholesterol. It carries cholesterol out to the tissues, and in excess it can deposit in artery walls, contributing to the fatty build-up that narrows arteries.
- HDL (high-density lipoprotein) — the "good" cholesterol. It helps carry cholesterol back to the liver for disposal, which is why higher levels are generally protective.
Why the balance matters more than the total
Total cholesterol lumps everything together, so it can be misleading. A high total driven by plenty of protective HDL is very different from the same total driven by high LDL. For this reason clinicians look at the components and often at the total-to-HDL ratio, and increasingly at non-HDL cholesterol (everything except HDL), which captures all the harmful particles in one figure.
What a lipid profile reports
A standard lipid profile gives you the full breakdown rather than a single number:
- Total cholesterol.
- LDL cholesterol.
- HDL cholesterol.
- Non-HDL cholesterol.
- The total-to-HDL ratio.
- Triglycerides, another blood fat that adds to the picture.
Check your cholesterol
Our lipid profile measures HDL, LDL, non-HDL and your total-to-HDL ratio, plus triglycerides — the full breakdown, not just a single total, so you can see where the balance sits.
Check your cholesterolWhat broadly counts as healthy
As a general guide, most adults are advised to aim for a lower LDL and non-HDL and a higher HDL, with a total-to-HDL ratio on the lower side. Exact targets depend on your personal risk — someone with diabetes or existing heart disease will have tighter goals than someone with no other risk factors. That is why results are best interpreted with a clinician rather than against a one-size-fits-all cut-off.
When to get checked
It is reasonable for most adults to know their cholesterol from around their 40s, or earlier with a family history of heart disease, diabetes or raised cholesterol. If your numbers are borderline or high, lifestyle changes and, where appropriate, medication can shift them — and a repeat test shows whether your efforts are working.
Check your cholesterol
Book online with OneMedicine — CQC-registered clinic in Birmingham, or a home visit / local clinic nationwide. Doctor-reviewed results, most within 24 hours.
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Specialist interest: Cardiovascular Medicine · OneMedicine, CQC-registered clinic