How does a doctor check your cholesterol level?
Actually, a doctor has very little to do with this procedure. All the doctor does is to order that the test should be done. From there, other people do all of the actual conducting of the test.
From the perspective of the patient, all that happens is that blood is drawn. All the times I have had my blood chemistry tested, the blood has been drawn from my arm. This is a simple procedure done by a technician.
Then the blood is sent to a laboratory. At the lab, a device called a spectrometer is used to determine what levels of cholesterol and other substances are in the blood. These results are then communicated to the doctor.
A doctor checks cholesterol levels by ordering a simple blood test. A sample of blood is taken from a vein and sent to a laboratory for analysis. Sometimes it is suggested that no food be eaten before the test but this is at the discretion of the doctor. Some cholesterol tests can be affected by food that was eaten prior to the test. LDL is the "bad" cholesterol and normally it should be lower than 200. The doctor will also take many factors into consideration such as age, family history, and blood pressure.
I have included a link below that explains exactly what the numbers mean.