Cholesterol is essential to the body, but the terminology surrounding it can be confusing. This guide explains the most common measures and offers practical questions to take to a qualified health professional.
Cholesterol is a waxy, fat-like substance found in the body's cells. The liver makes the cholesterol the body needs. In the bloodstream, cholesterol travels inside particles called lipoproteins. LDL particles can contribute to plaque in artery walls, while HDL particles help transport cholesterol back to the liver. The labels “bad” and “good” are useful shorthand, but they do not tell the whole story; overall cardiovascular risk depends on several factors.
Understanding common lipid results
A lipid panel commonly reports total cholesterol, LDL cholesterol, HDL cholesterol and triglycerides. Results in the United States are generally expressed in milligrams per deciliter (mg/dL). Many other countries use millimoles per liter (mmol/L). Laboratories may display reference ranges, but these are not the same as a personalized treatment target.
LDL cholesterol
- Lower level
- Below 100 mg/dL
- Intermediate
- 100–159 mg/dL
- Higher level
- 160 mg/dL or more
Total cholesterol
- Lower level
- Below 200 mg/dL
- Intermediate
- 200–239 mg/dL
- Higher level
- 240 mg/dL or more
HDL cholesterol
- Potential risk marker
- Below 40 mg/dL
- Interpretation
- Considered with overall risk
Triglycerides
- Typical reference
- Below 150 mg/dL
- High
- 200–499 mg/dL
- Very high
- 500 mg/dL or more
These broad categories are educational, not a diagnosis. Some people—particularly those with known cardiovascular disease or certain high-risk conditions—may be advised to aim for substantially lower LDL levels.
1. How often should cholesterol be measured?
Screening intervals vary. Many healthy adults are checked every four to six years, while more frequent testing may be appropriate for people with cardiovascular disease, diabetes, abnormal past results, relevant family history or treatment that needs monitoring. Ask a clinician what schedule fits your age and risk profile.
2. Can low HDL matter when total cholesterol is below 200?
Yes. Low HDL can be one marker of increased cardiovascular risk even when total cholesterol looks reassuring. However, attempts to raise HDL as a number have not necessarily produced better outcomes. Clinicians now tend to focus on the complete risk picture and on reducing LDL or non-HDL cholesterol when appropriate. For more context, read about why “good” cholesterol is more complicated.
3. Why can HDL change around menopause?
Hormonal and metabolic changes around menopause can alter lipid levels. LDL and total cholesterol often rise, and HDL measurements may also change. Because HDL quantity does not fully describe how its particles function, the entire lipid panel and other risk factors are more informative than HDL alone.
4. How can I lower LDL?
Helpful steps may include replacing foods high in saturated fat with unsaturated fats, eating more soluble fiber, being physically active, avoiding tobacco and working toward a sustainable weight when appropriate. Trans fats should be minimized; learn more about trans fat in the food supply. Medication may be recommended according to risk and response to lifestyle changes.
Alcohol should not be started to improve HDL. Even moderate intake can create health risks, and less is generally safer. If you drink, this overview explains what moderation means.
5. Why don't HDL and LDL add up to total cholesterol?
Total cholesterol includes cholesterol carried by several kinds of lipoprotein particles, not only HDL and LDL. A standard laboratory may estimate LDL using total cholesterol, HDL and triglycerides, or measure it directly. The calculation method can vary, particularly when triglycerides are high.
6. Are triglycerides cholesterol?
No. Triglycerides are a different type of blood fat used to store and supply energy. High levels often occur alongside insulin resistance, diabetes, abdominal obesity or other lipid abnormalities. Very high triglycerides can increase the risk of pancreatitis and require prompt medical attention.
7. Why don't food labels distinguish “good” and “bad” cholesterol?
HDL and LDL describe particles in the bloodstream, not two types of cholesterol in food. Dietary cholesterol occurs in animal-derived foods, while saturated and trans fats can influence the body's LDL level. The effect varies among individuals. See how much cholesterol in food may matter.
8. Can eggs and shrimp fit into a heart-supportive diet?
They can fit for many people, depending on portions, preparation, the rest of the eating pattern and personal medical considerations. Eggs and shrimp contain dietary cholesterol but are not necessarily high in saturated fat. Pairing them with vegetables, whole grains and unsaturated fats is different from serving them with foods rich in saturated fat or sodium. Individual advice may differ for people with certain conditions.
9. Do I need to fast before a cholesterol test?
Not always. A nonfasting lipid panel is suitable for many routine checks. A clinician may request a fasting test when triglycerides are elevated, when a previous result was difficult to interpret or when another fasting measurement is needed. Follow the instructions from the ordering laboratory or clinician.
10. What can affect a cholesterol test?
Recent illness, pregnancy, major weight change, unusual alcohol intake, some medicines and whether the sample was fasting can influence results. Normal biological and laboratory variation also occurs. If a result is unexpected, a clinician may repeat it before recommending a major change.
