A good LDL cholesterol number is below 100 mg/dL for most adults. That’s the level generally considered optimal, though your personal target may be lower depending on your heart disease risk. The latest 2026 guidelines from the American College of Cardiology and American Heart Association set different goals based on individual risk, ranging from under 100 mg/dL for lower-risk adults down to under 55 mg/dL for people with existing heart disease.
LDL Ranges at a Glance
LDL cholesterol falls into well-defined categories:
- Optimal: Below 100 mg/dL
- Elevated: 100 to 129 mg/dL
- Borderline high: 130 to 159 mg/dL
- High: 160 to 189 mg/dL
- Very high: 190 mg/dL or above
These categories apply to the general adult population. If your LDL comes back under 100, you’re in the range associated with the lowest cardiovascular risk for someone without other major risk factors. But the number that’s “good enough” for you specifically depends on what else is going on with your health.
Your Target Depends on Your Risk
Not everyone needs the same LDL number. Current guidelines assign targets based on your estimated 10-year risk of a cardiovascular event like a heart attack or stroke. That estimate factors in your age, blood pressure, smoking status, cholesterol levels, and whether you have conditions like diabetes.
For adults with borderline or intermediate risk (roughly a 3% to 10% chance of a cardiovascular event in the next decade), the recommended goal is an LDL below 100 mg/dL. If your 10-year risk is high, at 10% or above, the target drops to below 70 mg/dL.
The most aggressive targets apply to people who already have cardiovascular disease, such as those who’ve had a heart attack, stroke, or stent placement. For these individuals, guidelines recommend getting LDL below 55 mg/dL. The same target applies to people with diabetes who have established heart or vascular disease. Research on patients with type 2 diabetes and cardiovascular disease found that those who maintained LDL below 55 mg/dL had the lowest rates of repeat procedures, stroke, and cardiovascular death, at least among those under 65. For adults over 65 in that same high-risk group, the sweet spot appeared to be slightly higher, around 55 to 69 mg/dL.
Why LDL Matters for Your Arteries
LDL particles are small enough to slip through the lining of your blood vessels and lodge in the artery wall. Once trapped there, enzymes break them down and cause them to clump together. These clumps trigger an immune response: white blood cells called macrophages move in to clean up the cholesterol, but they absorb so much of it that they swell into what researchers call “foam cells.” Over time, this process builds fatty deposits, or plaque, inside your arteries.
Oxidized LDL, a chemically altered form, accelerates the problem. Macrophages have dedicated receptors for oxidized LDL and take it up aggressively. High concentrations of cholesterol in these deposits can even form microscopic crystals inside the artery wall. The result is a growing, inflamed plaque that can eventually narrow the artery or rupture and cause a clot. This entire process, called atherosclerosis, is driven by the number of LDL particles circulating in your blood over time. Lower numbers mean fewer particles getting trapped, which means less plaque.
Beyond Standard LDL Testing
The LDL number on a standard lipid panel measures the total mass of cholesterol carried inside LDL particles. But some experts argue that counting the particles themselves gives a more accurate picture of risk. A blood marker called apolipoprotein B (apoB) does exactly that: each particle that can contribute to plaque carries exactly one apoB molecule, so measuring apoB tells you how many of those particles are circulating.
The European Society of Cardiology concluded that apoB is a more accurate marker of cardiovascular risk than standard LDL cholesterol. This matters most when LDL and particle count don’t line up. Someone with a normal-looking LDL number can still have a high particle count, meaning more particles are entering artery walls than the LDL reading suggests. ApoB testing is widely available and inexpensive, and it’s worth asking about if your LDL is borderline or if you have risk factors like insulin resistance that can increase particle number without raising LDL cholesterol proportionally.
Lowering LDL Through Diet
Dietary changes can meaningfully shift your LDL. Replacing saturated fat with unsaturated fat is one of the most reliable levers. That means swapping butter, fatty cuts of meat, and full-fat dairy for olive oil, nuts, avocados, and fatty fish. Soluble fiber is another tool: getting 5 to 10 grams or more per day from foods like oats, beans, lentils, apples, and barley lowers LDL by binding cholesterol in the gut and carrying it out before it reaches the bloodstream.
These changes alone are sometimes enough to bring borderline numbers back to optimal, especially when combined with regular physical activity and weight management. For people with higher numbers or higher risk, medication is often necessary to reach target levels, but dietary improvements still add meaningful reductions on top of whatever a medication achieves.
How Often to Get Tested
Most healthy adults should have a cholesterol panel checked every 4 to 6 years. If you have heart disease, diabetes, or a family history of high cholesterol, more frequent testing makes sense so you and your doctor can track whether your numbers are trending in the right direction. Children should be screened at least once between ages 9 and 11, and again between 17 and 21, to catch inherited cholesterol conditions early. Kids with obesity or diabetes may need screening more often.
Cholesterol testing requires a simple blood draw. Many labs still recommend fasting for 9 to 12 hours beforehand, though non-fasting panels are increasingly accepted for routine screening. Your results will include total cholesterol, LDL, HDL, and triglycerides, giving a full picture of your lipid profile rather than just the LDL number on its own.