Health Encyclopedia

Cholesterol testing and results

Description

Cholesterol is a soft, wax-like substance found in all parts of the body. Your body needs a little bit of cholesterol to work properly. But too much cholesterol can clog your arteries and lead to heart disease.

Cholesterol blood tests are done to help you and your health care provider better understand your risk for heart disease, stroke, and other problems caused by narrowed or blocked arteries.

The ideal values for all cholesterol results depend on whether you already have heart disease, diabetes, or other risk factors. Your provider can tell you what your goal should be.

Alternative Names

Cholesterol test results; LDL test results; VLDL test results; HDL test results; Coronary risk profile results; Hyperlipidemia-results; Lipid disorder test results; Heart disease - cholesterol results

Cholesterol Tests

Some types of cholesterol are considered good and some are considered bad. Different blood tests can be done to measure each type of cholesterol.

Your provider may order only a total cholesterol level as the first test. It measures all types of cholesterol in your blood.

You may also have a lipid (or coronary risk) profile, which includes:

• Total cholesterol
• Low density lipoprotein (LDL cholesterol)
• High density lipoprotein (HDL cholesterol)
• Triglycerides (another type of fat in your blood)
• Very low density lipoprotein (VLDL cholesterol)

Lipoproteins are made of fat and protein. They carry cholesterol, triglycerides, and other fats, called lipids, in the blood to various parts of the body.

When Should You Be Tested?

Everyone should have their first screening test by age 35 for men, and age 45 for women. Some guidelines recommend starting at age 20 or even earlier depending on a person's overall health.

You should have a cholesterol test done at an earlier age if you have:

• Diabetes
• Heart disease
• Stroke
• High blood pressure
• A strong family history of heart disease

Follow-up testing should be done:

• Every 5 years if your results were normal.
• More often for people with diabetes, high blood pressure, heart disease, stroke, or blood flow problems to the legs or feet.
• As your provider recommends if you are taking medicines to control high cholesterol.

Total Cholesterol

A total cholesterol of less than 200 mg/dL (5.18 mmol/L) is considered best (lower numbers are better).

You may not need more detailed cholesterol tests if your cholesterol is in this normal range.

LDL (Bad) Cholesterol

LDL cholesterol is sometimes called "bad" cholesterol. LDL can clog your arteries.

You want your LDL to be low. Having too much LDL is linked to heart disease and stroke.

Your LDL is always considered to be too high if it is 190 mg/dL (4.92 mmol/L) or higher.

Levels from 70 to 189 mg/dL (1.81 to 4.90 mmol/L) are most often considered too high if:

• You have diabetes and are between ages 40 to 75
• You have diabetes and a high risk of heart disease
• You have a medium or high risk of heart disease
• You have heart disease, history of a stroke, or poor circulation to your legs

In these circumstances, your provider will often recommend medicine to lower your LDL cholesterol level.

Health care providers have traditionally set a target level for your LDL cholesterol if you are being treated with medicines to lower your cholesterol.

• Some newer guidelines now suggest that providers no longer need to target a specific number for your LDL cholesterol. Higher strength medicines are used for the highest risk patients.
• However, some guidelines still recommend using specific targets.

HDL (Good) Cholesterol

You want your HDL cholesterol to be high. Studies of both men and women have shown that the higher your HDL, the lower your risk of coronary artery disease. This is why HDL is sometimes referred to as "good" cholesterol.

HDL cholesterol levels greater than 40 to 60 mg/dL (1.04 to 1.55 mmol/L) are desired.

VLDL (Bad) Cholesterol

VLDL contains the highest amount of triglycerides. VLDL is considered a type of bad cholesterol, because it helps cholesterol build up on the walls of arteries.

Normal VLDL levels are from 2 to 30 mg/dL (0.05 to .78 mmol/L).

Considerations

Sometimes, your cholesterol levels may be low enough that your provider will not ask you to change your diet or take any medicines.

References

American Diabetes Association Professional Practice Committee. Erratum. 10. Cardiovascular disease and risk management: standards of medical care in diabetes-2023. Diabetes Care. 2023;46(Suppl 1):S158-S190. PMID: 36700978 pubmed.ncbi.nlm.nih.gov/36700978/.

Arnett DK, Blumenthal RS, Albert MA, et al. 2019 ACC/AHA Guideline on the primary prevention of cardiovascular disease: executive summary: a report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines. Circulation. 2020;141(16):e773. PMID: 30879339 pubmed.ncbi.nlm.nih.gov/30879339/.

Fox CS, Golden SH, Anderson C, et al. Update on prevention of cardiovascular disease in adults with type 2 diabetes mellitus in light of recent evidence: A scientific statement from the American Heart Association and the American Diabetes Association. Diabetes Care. 2015;38(9):1777-803. PMID: 26246459 pubmed.ncbi.nlm.nih.gov/26246459/.

Gennest J, Mora S, Libby P. Lipoprotein disorders and cardiovascular disease. In: Libby P, Bonow RO, Mann DL, Tomaselli GF, Bhatt DL, Solomon SD, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 12th ed. Philadelphia, PA: Elsevier; 2022:chap 27.

Grundy SM, Stone NJ, Bailey AL, et al. 2018 AHA/ACC/AACVPR/AAPA/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA Guideline on the management of blood cholesterol: a report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines. J Am Coll Cardiol. 2019;73(24):3234-3237. PMID: 30423391 pubmed.ncbi.nlm.nih.gov/30423391/.

Rohatgi A. Lipid measurement. In: de Lemos JA, Omland T, eds. Chronic Coronary Artery Disease: A Companion to Braunwald's Heart Disease. Philadelphia, PA: Elsevier; 2018:chap 8.

Review Date:1/1/2023
Reviewed By:Michael A. Chen, MD, PhD, Associate Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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