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 calculated LDL provides an estimate of LDL levels using the Friedewald formula.

2. How Does the Calculator Work?

The calculator uses the Friedewald equation:

Where:

• Total Cholesterol — Total cholesterol level in mg/dL
• HDL — High-Density Lipoprotein (good cholesterol) in mg/dL
• Triglycerides — Triglyceride level in mg/dL

Note: This formula is valid when triglycerides are less than 400 mg/dL. For higher levels, direct measurement is recommended.

3. Importance of LDL Calculation

Details: Monitoring LDL levels is crucial for assessing cardiovascular risk. High LDL levels are associated with increased risk of heart disease, stroke, and other cardiovascular events.

4. Using the Calculator

Tips: Enter total cholesterol, HDL, and triglycerides in mg/dL. All values must be positive numbers. The calculator provides LDL result with classification (Normal: <100 mg/dL, Near Optimal: 100-129 mg/dL, Borderline High: 130-159 mg/dL, High: ≥160 mg/dL).

5. Frequently Asked Questions (FAQ)

Q1: What is considered a normal LDL level?
A: Normal LDL is generally <100 mg/dL. Optimal levels may be even lower for high-risk individuals.

Q2: When is the Friedewald formula not accurate?
A: The formula is less accurate when triglycerides exceed 400 mg/dL, in non-fasting samples, or in certain medical conditions.

Q3: How often should LDL be checked?
A: Adults should have cholesterol checked every 4-6 years. Those with risk factors may need more frequent testing.

Q4: What factors affect LDL levels?
A: Diet, exercise, weight, genetics, medications, and certain medical conditions can all influence LDL levels.

Q5: How can I lower my LDL?
A: Lifestyle changes include healthy diet, regular exercise, weight management, and if needed, cholesterol-lowering medications.