LDL: normal range and what it means
"Bad" cholesterol — a primary driver of plaque build-up.
Normal range
Adult reference range.
- Optimal< 100 mg/dL
- Borderline100 – 130 mg/dL
- High≥ 130 mg/dL
What it measures
Low-density lipoprotein carries cholesterol into artery walls. Lower is better for long-term heart health.
What moves it
Saturated fat, genetics, insulin resistance, thyroid.
How to bring it into range
Soluble fibre, less saturated fat, exercise, and medication when needed.
How fast it responds
Weeks.
Also reported as: ldl cholesterol · low density lipoprotein
See where your own value lands
Upload a lab report and HealthOS reads all 88 markers, personalises every range to your sex and age, and tells you which ones actually need attention. Free, no account needed.
Check my blood testGet this marker explained for your own numbers
We’ll send you a short guide to reading this marker in context — what to check alongside it, and when a value is worth acting on.
One email about this marker. No spam, unsubscribe anytime.
Common questions
- What is a normal LDL level?
- Optimal: < 100 mg/dL. Adult reference range.
- What does a high LDL mean?
- A value above the reference band means LDL is outside the range typical for a healthy adult. A single reading is rarely conclusive on its own — what matters is the trend across draws and the other markers around it, which is why HealthOS reads the whole panel together rather than one number at a time.
- How do I improve my LDL?
- Soluble fibre, less saturated fat, exercise, and medication when needed.
Related markers
More in Lipids
Reference ranges are general-population guidance compiled from common clinical laboratories, not a diagnosis. Lab-to-lab ranges differ. Always read your results with your doctor.