Menu   WellSpan Health

Health Library

Health Library


Does this test have other names?

Total blood cholesterol, serum cholesterol

What is this test?

This test measures the amount of cholesterol in your blood to help determine your risk for heart disease.

Cholesterol is a substance found in all of your body's cells, where it plays an important role. But your body can develop too much cholesterol if you eat the wrong types of foods, especially fried foods and foods with saturated or trans fats. Some medical conditions can also make your cholesterol level too high.

If you have too much cholesterol in your blood, it can stick to and inflame the walls of your arteries, leading to heart disease. Excess cholesterol helps cause narrowing of the vessels that bring blood to your heart muscles. This narrowing is called atherosclerosis. If your heart muscles don't get enough blood, you may be at risk for a heart attack.

The American Heart Association recommends that all adults ages 20 and older have their cholesterol checked once every five years.

Why do I need this test?

You may have this test as part of your regular medical checkup. You may have this test done more often if you are at risk for heart disease or have other medical problems linked to high cholesterol.

Here are some common reasons for the test:

  • You have risk factors for heart disease, such as older age, obesity, family history of heart disease, high blood pressure, smoking, or diabetes.

  • You have a condition that may be closely linked to high cholesterol, including diabetes; alcoholism; and thyroid, liver, and kidney disease.

  • You eat a diet high in cholesterol and fats.

You may also have this test if you had high or borderline cholesterol on a previous blood test and your doctor is checking to see whether medication, diet, exercise, and other lifestyle changes are helping lower your cholesterol.

What other tests might I have along with this test?

Your doctor may also order other blood tests to find out your HDL ("good") cholesterol, LDL ("bad") cholesterol, and triglyceride levels. This combination of blood tests is called a lipoprotein profile or a lipid profile.

What do my test results mean?

Many things may affect your lab test results. These include the method each lab uses to do the test. Even if your test results are different from the normal value, you may not have a problem. To learn what the results mean for you, talk with your health care provider.

Total cholesterol is measured in milligrams per deciliter (mg/dL). This is what your cholesterol number may mean:

  • Less than 200 mg/dL is a good number, and your risk of heart disease may be low.

  • 200 mg/dL to 239 mg/dL is borderline high, and you may be at some risk for heart disease.

  • 240 mg/dL or higher means your cholesterol is high and your risk for heart disease is higher than that of a person with normal cholesterol.

High cholesterol may be linked to these conditions:

  • Inherited diseases that cause high cholesterol

  • Gallbladder stonesKidney failure

  • Cancer of the pancreas or prostate

  • Low thyroid hormone

  • Diabetes

  • Obesity

Cholesterol levels below 140 mg/dL may happen with:

  • Severe liver disease

  • High thyroid hormone

  • Severe burns

  • White blood cell cancers

  • Poor nutrition

  • Some types of anemia

  • Short-term illness or infection

  • Chronic lung disease

How is this test done?

The test requires a blood sample, which is drawn through a needle from a vein in your arm.

Does this test pose any risks?

Taking a blood sample with a needle carries risks that include bleeding, infection, bruising, or feeling dizzy. When the needle pricks your arm, you may feel a slight stinging sensation or pain. Afterward, the site may be slightly sore.

What might affect my test results?

Your diet, age, alcohol use, and other lifestyle choices may affect your results. Many medications may also affect your results. Pregnancy may also affect your results. Having a heart attack in the last three months will also affect your results.

How do I get ready for this test?

You should keep to your regular diet and avoid alcohol for at least two days before this test. You will be asked to not eat or drink anything but water for a certain amount of time before the test. This test is usually done in the morning after you fast overnight. If you take medications in the morning, ask your doctor whether you should take your pills.

In addition, be sure your doctor knows about all medicines, herbs, vitamins, and supplements you are taking. This includes medicines that don't need a prescription and any illicit drugs you may use.


Cholesterol - WellSpan Health

Author: Iliades, Chris, MD
Online Medical Reviewer: Sohrabi, Farrokh, MD
Online Medical Reviewer: Stump-Sutliff, Kim, RN, MSN, AOCNS
Last Review Date: 2012-06-18T00:00:00
Published Date: 2012-09-29T00:00:00
Last Review Date: 2012-06-27T00:00:00
© 2015 WellSpan Health. All Rights Reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

I would like to:

Are you sure you would like to cancel?

All information will be lost.

Yes No ×

About the provider search

This search will provide you with WellSpan Medical Group and Northern Lancaster County (Ephrata) Medical Group primary care physicians and specialists. If we don’t have a WellSpan Medical Group physician to meet your criteria, the search will expand to include community physicians who partner with WellSpan Medical Group physicians through the WellSpan Provider Network or provide care to patients on the Medical Staffs of WellSpan’s Hospitals.


Schedule Your Next Appointment Online with MyWellSpan

Use your MyWellSpan patient portal any time to view available appointments, and pick the date and time that best suits your schedule.

Go to MyWellSpan

New to this practice?

If you don't have a WellSpan primary care provider and would like to schedule a new patient appointment with a provider who is accepting patients, just log into your MyWellSpan account, and go to the Appointment Center section. As you progress through the scheduling process, you will be able to see the offices that are accepting new patients in relation to your zip code. If you are not enrolled in MyWellSpan, go to, call 1-866-638-1842 or speak with a member of the staff at a participating facility to sign up. New patient scheduling not available at all practices/programs.

Already a patient at this practice?

If you already have a relationship with a WellSpan practice, simply log into your account, and go to the Appointment Center section. As you progress through the scheduling process, you will be able to schedule an appointment with any provider or practice that already counts you as a patient. Online scheduling varies by practice/program.