# LDL cholesterol: The cholesterol that builds plaque

> LDL cholesterol builds plaque in your arteries. Check your result against the target for your risk, and see what raises it and what lowers it.

- Also called LDL-C, Low-density lipoprotein cholesterol, “Bad” cholesterol and LDL Chol Calc (NIH)
- Often on a standard checkup
- No fasting needed
- Web page: https://picardo.health/guides/biomarkers/ldl-cholesterol

## The short answer

LDL cholesterol is the cholesterol carried by the particles that build plaque in your artery walls. For your heart, lower is better. Under 100 mg/dL is the target for most people, and the higher your risk of heart disease, the lower your target.[1][2]

- **A good result:** Under 100 mg/dL for most people. Under 70 if your risk is high, and under 55 for most people who’ve had a heart attack or stroke.[2]
- **If yours is high:** It raises your risk over years, not this week. Food changes help some; statins lower it by 30% to 50% or more. At 190 or higher, a statin is recommended whatever your other risks.[2]
- **Should you test?** Yes. US guidelines recommend a cholesterol test from age 19, then at least every 5 years. Test more often if you have risk factors.[2]

## What is a normal LDL cholesterol level?

Labcorp flags an LDL of 100 mg/dL or higher. That’s also the target for most people, but guidelines set lower targets as your heart risk rises, and treat 190 or more as high whatever your risk:[2]

Which fits you best?

### Not sure

| Result (mg/dL) | What it means |
| --- | --- |
| Under 100 | Within the lab’s range |
| 100 to 159 | Above the lab’s range |
| 160 to 189 | High: often worth treating on its own |
| 190 or more | Very high: a statin is recommended whatever your risk |

### No diabetes or heart disease, and a 10-year risk under 10% (target: under 100 mg/dL)

| Result (mg/dL) | What it means |
| --- | --- |
| Under 100 | Under your target |
| 100 to 159 | Above the lab’s range |
| 160 to 189 | High: often worth treating on its own |
| 190 or more | Very high: a statin is recommended whatever your risk |

### Diabetes, inherited high cholesterol or a 10-year risk of 10% or more (target: under 70 mg/dL)

| Result (mg/dL) | What it means |
| --- | --- |
| Under 70 | Under your target |
| 70 to 99 | Normal on your report, but above your target |
| 100 to 159 | Above the lab’s range |
| 160 to 189 | High: often worth treating on its own |
| 190 or more | Very high: a statin is recommended whatever your risk |

### A past heart attack, stroke or narrowed arteries (target: under 55 mg/dL)

| Result (mg/dL) | What it means |
| --- | --- |
| Under 55 | Under your target |
| 55 to 99 | Normal on your report, but above your target |
| 100 to 159 | Above the lab’s range |
| 160 to 189 | High: often worth treating on its own |
| 190 or more | Very high: a statin is recommended whatever your risk |

Your 10-year risk is your chance of a heart attack or stroke in the next 10 years, from the PREVENT calculator clinicians use. With diabetes but no other risk factors, the target is under 100. After a heart attack or stroke, it’s under 70 if your clinician judges your risk isn’t very high.[2] If you’re not sure which group you’re in, ask your clinician.

### Under your target

**Range:** Under 100 mg/dL for most people; under 70 or 55 if your risk is higher.

Your LDL is where the 2026 US guideline wants it for someone at your level of risk.[2]

**How worried to be:** Nothing to worry about.

**What to do next:**

1. Keep doing what you’re doing.
2. If your triglycerides are high or you have diabetes, ApoB can show whether some risk remains.[2]
3. If you’ve never had Lp(a) checked, do it once. It’s inherited and needs its own test.[2]

[Test ApoB and Lp(a), $24.40](https://app.picardo.health/labs/order?tests=167015,120188&ref=guide-ldl-cholesterol)

### Normal on your report, but above your target

**Range:** 55 to 99 mg/dL, if you have diabetes, inherited high cholesterol, a high 10-year risk or past heart disease.

Labcorp won’t flag this, because its cutoff is 100. But with diabetes and other risk factors, inherited high cholesterol, a high 10-year risk or a past heart attack or stroke, guidelines aim lower: under 70, or under 55.[2]

**How worried to be:** Worth acting on over the next few months. It isn’t urgent.

**What to do next:**

1. Ask your clinician whether your treatment should step up. If you’re on a statin, guidelines suggest adding ezetimibe or another medicine to reach your target.[2]
2. Food changes help a little; see how to lower LDL cholesterol below.
3. Recheck 4 to 12 weeks after any change.[2]

[Test Lp(a) and HbA1c, $20.00](https://app.picardo.health/labs/order?tests=120188,001453&ref=guide-ldl-cholesterol)

### Above the lab’s range

**Range:** 100 to 159 mg/dL.

Your LDL is above the lab’s cutoff and the target for most people. Over the years, the extra adds to your risk of a heart attack or stroke.[1]

**How worried to be:** Worth acting on, but not urgent. This is about the years ahead, not this week.

**What to do next:**

1. See a clinician about whether to start or step up treatment. Without heart disease, the decision rests on your 10-year risk.[2]
2. Start with food: swap saturated fat for unsaturated fat.[8]
3. Check Lp(a) and HbA1c. A high Lp(a) favors stronger treatment, and diabetes with other risk factors lowers your target.[2]
4. Recheck 4 to 12 weeks after any change.[2]

[Test Lp(a) and HbA1c, $20.00](https://app.picardo.health/labs/order?tests=120188,001453&ref=guide-ldl-cholesterol)

### High: often worth treating on its own

**Range:** 160 to 189 mg/dL.

US guidelines count an LDL that stays at 160 or more as a risk enhancer. At this level, a statin is reasonable even when your 10-year risk is low, because years of exposure add up.[2]

**How worried to be:** Worth seeing a clinician in the next month or two. It isn’t urgent.

**What to do next:**

1. See a clinician about whether to start a statin.[2]
2. Check Lp(a) and HbA1c. Either can add to your risk.[2]
3. Swap saturated fat for unsaturated fat; see how to lower LDL cholesterol below.[8]

[Test Lp(a) and HbA1c, $20.00](https://app.picardo.health/labs/order?tests=120188,001453&ref=guide-ldl-cholesterol)

### Very high: a statin is recommended whatever your risk

**Range:** 190 mg/dL or higher.

At 190 or more, US guidelines recommend a statin without first calculating your 10-year risk. Some people at this level have familial hypercholesterolemia, an inherited form; others have a cause such as an underactive thyroid or a diet very high in saturated fat.[2]

**How worried to be:** See a clinician in the next few weeks. It isn’t an emergency.

**What to do next:**

1. See a clinician about starting a statin.[2]
2. Ask about tests for other causes, such as an underactive thyroid or kidney disease, and whether genetic testing for familial hypercholesterolemia makes sense.[2]
3. If it’s inherited, your parents, siblings and children should be tested too.[2]

[Test TSH, a metabolic panel and Lp(a), $25.00](https://app.picardo.health/labs/order?tests=004259,322000,120188&ref=guide-ldl-cholesterol)

### Within the lab’s range

**Range:** Under 100 mg/dL.

Labcorp won’t flag this, and it meets the target for most people. If your risk is higher, the target is lower: under 70 at high risk, and under 55 for most people after a heart attack or stroke.[2]

**How worried to be:** Not a worry on its own.

**What to do next:**

1. Pick the group that fits you above to see your own target.
2. If heart disease runs in your family, check Lp(a) once. It’s inherited and needs its own test.[2]

[Test Lp(a), $16.00](https://app.picardo.health/labs/order?tests=120188&ref=guide-ldl-cholesterol)

## What is LDL cholesterol?

> Picture LDL particles as delivery vans, and cholesterol as the load they carry. An LDL cholesterol test adds up the load. ApoB and LDL particle number count the vans instead. Vans are what get stuck in artery walls, but more load usually means more vans, so for most people the load is a good guide.[6]

Cholesterol travels in your blood inside particles, and LDL particles are a direct cause of plaque. Genetic studies, population studies and trials agree: the more LDL you have, and the longer you have it, the higher your risk of a heart attack or stroke.[1]

Lowering it works. In statin trials, every 39 mg/dL drop in LDL cut heart attacks, strokes and artery-opening procedures by about a fifth, and the benefit showed no lower limit in the range studied.[5]

## How is LDL cholesterol different from ApoB?

Each LDL particle carries one ApoB protein. So ApoB counts the particles, while LDL cholesterol measures how much cholesterol they hold. LDL particle number is another way to count them.[6]

Most of the time the two agree. They drift apart when particles are small and hold less cholesterol each, which is common with high triglycerides, diabetes or extra weight. Your LDL cholesterol can then sit in range while the number of particles is high.[2][6]

That’s why US guidelines suggest checking ApoB once your LDL is at target, especially if your triglycerides are high or you have diabetes.[2]

## When is a calculated LDL less accurate?

A standard cholesterol test measures total cholesterol, HDL and triglycerides, then calculates LDL from them.[2] Labcorp uses the NIH equation, which US guidelines prefer to the older Friedewald formula.[2][7]

Any calculation is least reliable in two situations:[2]

- Very low LDL, under about 70 mg/dL
- High triglycerides, 150 mg/dL or more, and especially 400 or more

The NIH equation handles triglycerides up to 800 about as well as the old formula handles them under 400.[3] Above 800, Labcorp doesn’t report an LDL at all.[7] With high triglycerides, a fasting retest gives a more accurate LDL, and non-HDL cholesterol or ApoB is the better guide to your risk.[2]

## What raises LDL cholesterol?

- Your genes, including familial hypercholesterolemia, which affects about 1 in 250 to 300 people[2]
- Food high in saturated fat, such as fatty red meat, butter, full-fat dairy and coconut or palm oil[2]
- Very low-carb, high-fat diets, in some people[2]
- Weight gain[2]
- An underactive thyroid, kidney disease, nephrotic syndrome or liver disease that blocks bile flow[2]
- Some medicines, including steroids, high-dose thiazide diuretics, some antipsychotics and cyclosporine[2]
- Menopause and pregnancy[2]

## How to lower LDL cholesterol

- **Statins:** The first choice for most people. A moderate dose lowers LDL by 30% to 49% and a high dose by 50% or more. Both prevent heart attacks and strokes.[2] How much it helps: a lot. How sure we are: very sure.
- **Adding ezetimibe:** A daily pill that blocks cholesterol absorption in the gut. On top of a statin, it lowers LDL by about another 25%.[2] How much it helps: some. How sure we are: very sure.
- **PCSK9 inhibitors:** Antibody injections every 2 or 4 weeks lower LDL by 45% to 64%, usually alongside a statin, and cut heart attacks and strokes in people with heart disease. Inclisiran, given twice a year, lowers it by about half; its outcome trials are still running.[2] A daily pill, enlicitide, was approved in 2026, so far only to lower LDL. It cut LDL by about 56% in its main trial.[9] How much it helps: a lot. How sure we are: very sure.
- **Bempedoic acid:** A daily pill that lowers LDL by 21% to 24% on its own, or by about another 17% on top of a statin. In a large trial of people who couldn’t take statins, it cut heart events.[2] How much it helps: some. How sure we are: very sure.
- **Swapping saturated fat for unsaturated fat:** Butter, fatty meat and coconut oil for olive oil, nuts, seeds and fish. Trials that replaced saturated fat with vegetable oils cut heart disease by about 30%.[8] How much it helps: some. How sure we are: very sure.
- **A plant-heavy diet:** Adding nuts, soy, high-fiber foods and a plant sterol spread lowered LDL by about 26 mg/dL in a trial. Vegetarian diets lower it by about 12 mg/dL on average.[2] How much it helps: some. How sure we are: fairly sure.
- **Losing extra weight:** Mostly lowers triglycerides. LDL falls by only about 0.3 to 1.7 mg/dL for each kilogram (2.2 pounds) lost.[2] How much it helps: a little. How sure we are: fairly sure.

Clinicians recheck 4 to 12 weeks after you start or change treatment, then every 6 to 12 months.[2] If you cut saturated fat, replace it with unsaturated fat rather than refined carbs and sugar, which don’t lower heart risk.[8]

## Who should get an LDL cholesterol test?

- Every adult from age 19, at least every 5 years. More often if you have other risk factors.[2]
- Anyone whose parent, sibling or other close relative had heart disease young, very high cholesterol or familial hypercholesterolemia.[2]
- Anyone on cholesterol treatment, 4 to 12 weeks after starting or changing it.[2]

US guidelines also recommend checking children once between ages 9 and 11, to catch inherited high cholesterol early.[2] And if you’ve never had Lp(a) measured, add it: US guidelines recommend it at least once in every adult’s life.[2]

## How to get an LDL cholesterol test, and what it costs

It comes from the lipid panel, which costs $4.50 through Picardo. The Heart Health panel adds 16 more tests from the same visit for $150.90.

- **Recommended:** [the Heart Health panel, $150.90](https://app.picardo.health/labs/order?panels=heart-health&ref=guide-ldl-cholesterol). 17 tests, fast for 12 hours first. LDL cholesterol is one part of the picture. The panel measures it in an NMR LipoProfile, which also counts your LDL particles, and adds ApoB and Lp(a), which is inherited, plus blood sugar, kidney, liver and thyroid tests. [What’s in it](https://picardo.health/guides/panels/heart-health.md).
- [Lipid panel, $4.50](https://app.picardo.health/labs/order?tests=303756&ref=guide-ldl-cholesterol). The test this number comes from. Labcorp 303756, no fasting needed.

Every order comes with:

- Results in 2 to 3 days, in the app
- Physician follow-up if you want one
- Free Labcorp draw, or $75 at home
- No other fees. HSA and FSA eligible.

It’s also part of the [Base Core Annual – Men](https://picardo.health/labs/panels/base-core-men), [Base Core Annual – Women](https://picardo.health/labs/panels/base-core-women) and [Postpartum](https://picardo.health/labs/panels/postpartum) panels, if you want a wider checkup.

Already have a result? [Ask Picardo about it](https://app.picardo.health/auth).

## Questions people ask

### Can LDL cholesterol be too low?

Not as far as trials have found. In statin trials, lowering LDL further kept cutting heart attacks and strokes even in people who started under about 77 mg/dL, with no rise in cancer or other non-heart deaths.[5] A very low calculated LDL can be less accurate, though, so your clinician may also look at ApoB.[2]

### What LDL level means I need a statin?

It depends on your overall risk, not LDL alone. At 190 or more, guidelines recommend a statin regardless. From 160 to 189, one is reasonable even if your 10-year risk is low. Below 160, your clinician weighs your 10-year risk, diabetes and other factors.[2]

### Do I need to fast for an LDL cholesterol test?

Usually not. After a normal meal, LDL reads at most about 8 mg/dL lower than fasting, and both predict heart risk equally well.[4] But US guidelines say you should fast first in three cases: high cholesterol or early heart disease in your family, a known or suspected triglyceride disorder or a non-fasting triglyceride result of 400 or more.[2] If the same draw includes glucose or insulin, follow their fasting instructions.

### Can a keto diet raise LDL cholesterol?

It can, sometimes a lot. Very low-carb diets often swap carbs for saturated fat, and in some people LDL climbs to 190 or more.[2] If that happens, a clinician or dietitian can help you bring it down while keeping the diet’s goals.[2]

### Why is my LDL high when I eat well and exercise?

Genes set much of your LDL. About 1 in 250 to 300 people has familial hypercholesterolemia, which keeps LDL high from childhood whatever you eat.[2] An underactive thyroid can raise it too. Exercise has only a modest effect on LDL.[2]

## Often checked alongside

- [ApoB](https://picardo.health/guides/biomarkers/apob.md): How many plaque-building particles you have
- [Non-HDL cholesterol](https://picardo.health/guides/biomarkers/non-hdl-cholesterol.md): The cholesterol in every plaque-building particle
- [Lp(a)](https://picardo.health/guides/biomarkers/lipoprotein-a.md): An inherited particle that raises heart risk
- [LDL particle number](https://picardo.health/guides/biomarkers/ldl-particle-number.md): How many LDL particles you have

## Test details

- **Labcorp test:** Lipid Panel, 303756
- **LOINC:** 13457-7
- **Sample:** Blood
- **Fasting:** Not needed[2][4]
- **Typical lab range:** Under 100 mg/dL
- **Method:** Calculated from total cholesterol, HDL and triglycerides with the NIH equation[3][7]
- **Units:** mg/dL in the US. For mmol/L, divide by 38.6.

## Sources

1. Ference BA, Ginsberg HN, Graham I, et al. Low-density lipoproteins cause atherosclerotic cardiovascular disease. 1. Evidence from genetic, epidemiologic, and clinical studies. A consensus statement from the European Atherosclerosis Society Consensus Panel. Eur Heart J. 2017;38(32):2459–2472. https://doi.org/10.1093/eurheartj/ehx144
2. Blumenthal RS, Morris PB, Gaudino M, et al. 2026 ACC/AHA/AACVPR/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA guideline on the management of dyslipidemia: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2026;153(17):e1154–e1276. https://doi.org/10.1161/CIR.0000000000001423
3. Sampson M, Ling C, Sun Q, et al. A new equation for calculation of low-density lipoprotein cholesterol in patients with normolipidemia and/or hypertriglyceridemia. JAMA Cardiol. 2020;5(5):540–548. https://doi.org/10.1001/jamacardio.2020.0013
4. Nordestgaard BG, Langsted A, Mora S, et al. Fasting is not routinely required for determination of a lipid profile: clinical and laboratory implications including flagging at desirable concentration cut-points. Eur Heart J. 2016;37(25):1944–1958. https://doi.org/10.1093/eurheartj/ehw152
5. Cholesterol Treatment Trialists’ (CTT) Collaboration; Baigent C, Blackwell L, Emberson J, et al. Efficacy and safety of more intensive lowering of LDL cholesterol: a meta-analysis of data from 170,000 participants in 26 randomised trials. Lancet. 2010;376(9753):1670–1681. https://doi.org/10.1016/S0140-6736(10)61350-5
6. Sniderman AD, Thanassoulis G, Glavinovic T, et al. Apolipoprotein B particles and cardiovascular disease: a narrative review. JAMA Cardiol. 2019;4(12):1287–1295. https://doi.org/10.1001/jamacardio.2019.3780
7. Labcorp. Lipid Panel (303756). Labcorp test menu. Accessed October 28, 2026. https://www.labcorp.com/tests/303756/lipid-panel
8. Sacks FM, Lichtenstein AH, Wu JHY, et al. Dietary fats and cardiovascular disease: a presidential advisory from the American Heart Association. Circulation. 2017;136(3):e1–e23. https://doi.org/10.1161/CIR.0000000000000510
9. Merck Sharp & Dohme. Lipfendra (enlicitide) tablets, for oral use: prescribing information. Revised July 2026. DailyMed. Accessed October 28, 2026. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=100ec543-fbd0-44fc-b740-db9cdff39145

Updated 2026-10-28. This is general health information, not medical advice: talk to your clinician about your results and before changing any treatment.