What is LDL?
LDL cholesterol (LDL-C) is the cholesterol carried by low-density lipoprotein particles, which deposit cholesterol into artery walls and drive atherosclerosis. LDL-C is the main target of cholesterol-lowering therapy and a cornerstone of cardiovascular risk assessment.
Why it matters
Higher LDL cholesterol over time increases the buildup of arterial plaque, raising the risk of heart attack and stroke. Lowering LDL reliably reduces cardiovascular events.
What it measures
The cholesterol content of LDL particles, usually calculated or directly measured as part of a lipid panel.
Reference & optimal ranges
Reference ranges vary by lab, assay, age, and sex. The ranges below reflect commonly published adult intervals and are for education only always interpret results with the range printed on your own lab report and a clinician.
High LDL cholesterol increases plaque buildup and cardiovascular risk; the target depends on your overall risk.
Common symptoms
- None silent until a cardiovascular event
Potential causes
- Diet high in saturated/trans fat
- Genetics (familial hypercholesterolemia)
- Hypothyroidism
- Sedentary lifestyle, obesity
- Some medications
Low LDL cholesterol is generally favorable for heart health.
Common symptoms
- None
Potential causes
- Healthy diet and lifestyle
- Statins and other lipid-lowering drugs
- Rare genetic conditions
How to improve your LDL
Lifestyle
Know your target
LDL goals are risk-based; discuss whether lifestyle alone or medication is appropriate with a clinician.
Nutrition
Cut saturated fat, add soluble fiber
Oats, legumes, nuts, and replacing saturated with unsaturated fat lower LDL.
Exercise
Regular aerobic exercise
Improves lipid profile and cardiovascular fitness.
Sleep
General health
Supports overall metabolic and cardiovascular wellness.
Frequently asked questions
Scientific references
- 2018 AHA/ACC Guideline on the Management of Blood Cholesterol American Heart Association / American College of Cardiology (2019)
- LDL: The 'Bad' Cholesterol MedlinePlus, U.S. National Library of Medicine
Educational information, not medical advice. This page is for general education and does not replace diagnosis or treatment by a licensed clinician. Do not start, stop, or change any medication, supplement, or treatment based on this content. Reference and optimal ranges vary between laboratories interpret your results with the range on your own report and a qualified professional.