1. What is LDL Cholesterol?

LDL (Low-Density Lipoprotein) cholesterol, often called "bad cholesterol," can build up in the walls of your arteries, making them hard and narrow. The normal LDL level is considered to be less than 100 mg/dL.

2. How Does the Calculator Work?

The calculator uses the Friedewald formula:

Where:

• \( TC \) — Total cholesterol (mg/dL)
• \( HDL \) — HDL cholesterol (mg/dL)
• \( TG \) — Triglycerides (mg/dL)

Explanation: This formula estimates LDL cholesterol levels without requiring a direct LDL measurement, making it a convenient and cost-effective method.

3. Importance of LDL Calculation

Details: Monitoring LDL cholesterol is crucial for assessing cardiovascular risk and guiding treatment decisions for cholesterol management.

4. Using the Calculator

Tips: Enter total cholesterol, HDL cholesterol, and triglycerides in mg/dL. All values must be valid and positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal LDL level?
A: Normal LDL level is generally considered to be less than 100 mg/dL. Levels between 100-129 mg/dL are near optimal.

Q2: When is this formula not accurate?
A: The formula is less accurate when triglyceride levels are above 400 mg/dL or in non-fasting samples.

Q3: How often should cholesterol be checked?
A: Adults should have their cholesterol checked every 4-6 years, or more frequently if they have risk factors for heart disease.

Q4: What factors affect LDL levels?
A: Diet, exercise, weight, smoking, medications, and genetic factors can all influence LDL cholesterol levels.

Q5: Should I fast before cholesterol testing?
A: For accurate results, it's recommended to fast for 9-12 hours before cholesterol testing, though non-fasting tests are becoming more common.