The Low Density Lipoprotein Cholesterol (direct) test is used to evaluate a person's risk for heart disease. LDL is often referred to as the "bad" cholesterol because it carries cholesterol into the arteries. With a standard Lipid Panel Cholesterol Test, the LDL measurement is calculated using a person's Total Cholesterol, HDL, and Triglycerides. However, for people with elevated Triglyceride levels, their LDL calculation may not be accurate. In these cases, a direct measurement of a person's LDL can be more effective. Unlike a Lipid Panel, this test does not require fasting prior to blood collection.
An LDL (direct) test is typically ordered when a person has been shown to have high Triglyceride levels which can affect the accuracy of their LDL measurement in a standard Lipid Panel.
The turnaround time for a LDL Cholesterol (direct) test is typically 1 business day.
Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.
The LDL test has no fasting requirements. LDL may decrease with acute illness, accident or surgery or increase during pregnancy. It is recommended that those people wait 6 weeks before testing.
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