How do we know how much cholesterol runs in our blood?
With a simple blood examination. Fasting at least 12 hours before the test (only drinking water or taking our pills is allowed) is a prerequisite of the examination. So, if we plan to make the examination at 9 am, then from 9 in the evening of the previous day we should not eat or drink anything except water. Diabetic patients should not take their pill or make an insulin injection the morning of the examination because they run a risk to develop hypoglycaemia.
The lab measures the amount of total cholesterol, "good" (HDL) cholesterol and triglycerides. Cholesterol is measured in milligrams per deciliter (mg / dL). The lab does not directly measure "bad" (LDL) cholesterol. The calculation of "bad" (LDL) cholesterol is done in 3 steps:
We divide triglycerides by 5
We add the "good" (HDL) cholesterol to the result of the division
We remove this sum from total cholesterol results
It should be noted that if triglycerides are over 400 mg / dL we can not apply this rule.