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LDL Cholesterol Test

⚠️ Update approaching🔬 Evidence: StrongCardiology
Diğer adları: Bad cholesterol, LDL, LDL-C
⚠️

Discuss your test results with your doctor. This page is for informational purposes only and does not provide a diagnosis.

⚡ Key Facts

• Measures the amount of cholesterol carried by low-density lipoprotein (LDL) particles • Causally linked to atherosclerosis and cardiovascular disease • There is no single fixed "normal" — targets are determined by individual cardiovascular risk • Part of the lipid panel

🧪 What Does This Test Measure?

The LDL cholesterol test measures the amount of cholesterol carried by low-density lipoprotein particles, which are causally linked to atherosclerosis and cardiovascular disease.

📋 Why Is It Ordered?

Ordered for cardiovascular risk assessment, planning and monitoring of lipid-lowering therapy, and dyslipidemia screening. A core component of the lipid panel.

🔧 Preparation

Current guidelines accept non-fasting lipid panels as adequate in most situations. Fasting may be preferred when triglyceride evaluation is also needed.

📊 Reference Ranges

General population classification: Optimal: <100 mg/dL (<2.6 mmol/L) Near optimal: 100–129 mg/dL Borderline high: 130–159 mg/dL High: 160–189 mg/dL Very high: ≥190 mg/dL ⚠️ Targets are individualized based on cardiovascular risk.

⬆️ High Values

Elevated LDL cholesterol may be associated with dietary habits, genetic predisposition, hypothyroidism, nephrotic syndrome, or certain medications.

⬇️ Low Values

Low LDL cholesterol is generally considered favorable. However, very low levels in untreated individuals may be associated with malnutrition, malabsorption, or certain genetic conditions.

⚙️ What Can Affect Results?

Diet, physical activity, genetic factors, body weight, thyroid function, certain medications, and measurement method are key factors that may affect LDL cholesterol.

🔬 Evidence Summary

Strong evidence: 4 guidelines, 3 meta-analyses, 1 consensus review.

📚 Most Important Studies on This Topic

1

2026 ACC/AHA/AACVPR/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA Guideline on the Management of Dyslipidemia

Guideline· Circulation · 2026 · PMID: 41824590

2

Low-density lipoproteins cause atherosclerotic cardiovascular disease. 1. Evidence from genetic, epidemiologic, and clinical studies. A consensus statement from the European Atherosclerosis Society Consensus Panel

Review· European Heart Journal · 2017 · PMID: 28444290

3

Efficacy and safety of more intensive lowering of LDL cholesterol: a meta-analysis of data from 170,000 participants in 26 randomised trials

Meta-analysis· The Lancet · 2010 · PMID: 21067804

✅ Key Takeaways

💡

What you learned: LDL cholesterol is causally linked to atherosclerosis. Target values are determined by individual cardiovascular risk level; there is no single universal threshold.

⛔

An LDL cholesterol result alone cannot determine treatment decisions. Total cardiovascular risk, other lipid parameters, and clinical context are all needed.

🔬 Sources Used on This Page

8 sources · Most recent publication: 2026
📋
Guideline
Expert society and guideline recommendations
4
sources
📊
Systematic review / meta-analysis
Combined analysis of multiple studies
3
sources
📖
Review
Comprehensive topic evaluation
1
source
Overall assessment: Evidence level for this topic is strong. This page is supported by 4 guidelines, 3 systematic reviews/meta-analysis, 1 review.

📝 Questions to Ask Your Doctor

Be prepared for your appointment. Add questions to your list.

📋 References

[PMID: 41824590] 2026 ACC/AHA/AACVPR/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA Guideline on the Management of Dyslipidemia. Circulation, 2026.
[PMID: 40878289] 2025 Focused Update of the 2019 ESC/EAS Guidelines for the management of dyslipidaemias. European Heart Journal, 2025.
[PMID: 31504418] 2019 ESC/EAS Guidelines for the management of dyslipidaemias: lipid modification to reduce cardiovascular risk. European Heart Journal, 2019.
[PMID: 30586774] 2018 AHA/ACC/AACVPR/AAPA/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA Guideline on the Management of Blood Cholesterol. Circulation, 2018.
[PMID: 28444290] Low-density lipoproteins cause atherosclerotic cardiovascular disease. 1. Evidence from genetic, epidemiologic, and clinical studies. A consensus statement from the European Atherosclerosis Society Consensus Panel. European Heart Journal, 2017.
[PMID: 23083789] Effect of long-term exposure to lower low-density lipoprotein cholesterol beginning early in life on the risk of coronary heart disease: a Mendelian randomization analysis. Journal of the American College of Cardiology, 2012.
[PMID: 21067804] Efficacy and safety of more intensive lowering of LDL cholesterol: a meta-analysis of data from 170,000 participants in 26 randomised trials. The Lancet, 2010.
[PMID: 16214597] Efficacy and safety of cholesterol-lowering treatment: prospective meta-analysis of data from 90,056 participants in 14 randomised trials of statins. The Lancet, 2005.
Last reviewed: 3/31/2026
Next review: 3/31/2027

⚖️ Comparisons

HDL vs LDL→

🔗 Related Topics

🩺 Aterosklerotik kardiyovasküler hastalık🧪 HDL kolesterol🧪 Trigliserid🧪 Total kolesterol🧪 CRP (Enflamasyon belirteci)
⚖️ This page does not replace medical advice. Make treatment decisions with your doctor.
Content is based on scientific studies indexed in PubMed and current clinical guidelines.