Quick Reference
- Full form
- Low-Density Lipoprotein Cholesterol
- Sample type
- Blood
- Fasting
- 9 to 12 hours recommended
- Marker measured
- 1
- Report turnaround
- Same day
- Available at
- All locations
About LDL Cholesterol (Serum)
LDL, often called bad cholesterol, is the main target when assessing heart disease risk, since higher levels are linked to plaque buildup in your arteries over time.
We recommend fasting for 9 to 12 hours before this test for the most accurate reading. Results are available the same day.
How to Prepare
- Fasting for 9 to 12 hours is recommended for the most accurate result.
- Water is fine during your fasting window.
Frequently Asked Questions
Why is LDL called bad cholesterol?
Higher LDL levels are linked to plaque buildup in your arteries over time, raising heart disease risk.
Should I fast before an LDL test?
Yes, fasting for 9 to 12 hours beforehand gives the most accurate reading.
What is a healthy LDL level?
Generally under 100 mg/dL is considered optimal, though your target may be lower with existing heart disease or diabetes.
Can LDL be lowered without medication?
Yes, diet changes, regular exercise, and weight management can meaningfully lower LDL for many people.
How soon will my report be ready?
Same day.
Is home sample collection available?
Yes, ideal for an early morning fasting sample, in all City Care Lab service areas.
This page provides general health information and is not a substitute for medical advice. Speak with your doctor about your specific results and treatment.