Non-HDL Cholesterol

Non-HDL cholesterol is your total cholesterol minus your HDL ("good") cholesterol, capturing all the cholesterol carried by potentially harmful particles like LDL, VLDL, and their remnants in one number. It's a simple calculation that doesn't require fasting.

bloodmg/dL · mmol/LAlso known as Non-HDL-C, Atherogenic cholesterol, Total cholesterol minus HDL

Reviewed by LifeFrom’s medical AI

The distinctions
  1. 01
    Calculated LDL falls apart at high triglycerides; non-HDL does not

    The LDL on most reports is estimated with a formula that subtracts a fixed fifth of your triglycerides. As triglycerides rise, that estimate reads too low, and above 400 mg/dL the lab may not report an LDL at all. Non-HDL skips the estimate, so it stays valid exactly when LDL becomes unreliable.

  2. 02
    Non-HDL counts every plaque-building particle; LDL counts just one

    LDL cholesterol measures only the cholesterol inside LDL particles. Non-HDL, which is total cholesterol minus HDL, captures the cholesterol in every apoB-carrying particle at once: LDL plus VLDL, IDL, remnants, and Lp(a). Counting all of them, rather than LDL alone, is what lets non-HDL read plaque-building risk more completely, especially when triglycerides are high.

  3. 03
    Your non-HDL goal is your LDL goal plus 30

    Non-HDL treatment targets are set about 30 mg/dL above the matching LDL target, so an LDL goal under 100 mg/dL pairs with a non-HDL goal under 130 mg/dL. That fixed offset lets you read both numbers off one report.

Non-HDL cholesterol is total cholesterol minus HDL cholesterol. That one subtraction leaves you with the cholesterol carried in every particle that can build plaque in an artery wall, and skips only the HDL (the protective, 'good' cholesterol your body uses to clear cholesterol away). For most adults the general-population target is under 130 mg/dL, though your clinician sets the one that fits you.

What is non-HDL cholesterol?

Your blood carries cholesterol inside particles called lipoproteins. Some of those particles drop cholesterol into artery walls and build plaque. The main one is LDL (low-density lipoprotein, the 'bad' cholesterol), joined by VLDL (very-low-density lipoprotein, the particle that hauls triglycerides), IDL (an in-between particle), the leftover 'remnants' they shed, and Lp(a) (lipoprotein(a), a mostly-inherited particle). Every one of those harmful particles carries a single tag protein, apoB (apolipoprotein B). The apoB page sums it up in a line, 'one apoB per particle,' so counting apoB is a way of counting the particles themselves. HDL is the exception: it ferries cholesterol back out, so it does not build plaque.

Non-HDL cholesterol adds up the cholesterol inside all the apoB-carrying particles and leaves HDL out. You do not have to measure each type. Subtracting HDL from your total cholesterol removes the one protective slice and leaves everything harmful behind in a single number.

How do you calculate non-HDL cholesterol?

Non-HDL cholesterol equals total cholesterol minus HDL cholesterol. That is the whole formula. If your total cholesterol is 220 mg/dL and your HDL is 60 mg/dL, your non-HDL is 160 mg/dL. There is no fasting requirement and no equation to run, which is what keeps it valid when triglycerides are high and the calculated LDL on your report cannot be trusted.

2 numbersNon-HDL needs only your total cholesterol and your HDL, both on every standard panelNo fasting, no equation, no separate order

Where an example non-HDL of 160 fallsmg/dL

160 mg/dLabove the general target · example: total 220 minus HDL 60
Desirable0–130Above optimal130–160Borderline high160–190High190–220Very high220–240
An example non-HDL of 160 mg/dL sits above the general target of 130 mg/dL, in the borderline-high band. It is a number to bring to your clinician, who weighs it against your LDL, triglycerides, and overall heart risk before any decision.
Illustrative. Non-HDL categories mirror the LDL categories plus 30 mg/dL, with a general target under 130 mg/dL; risk-based targets fall to under 100 (high risk) and under 85 mg/dL (very high risk). Cutoffs: NCEP ATP III [[3]] and 2019 ESC/EAS [[2]].

Non-HDL vs LDL: which one matters more?

For most people non-HDL is the sharper single number, and the gap widens when triglycerides are high, because of how LDL is measured. The LDL on your report is usually not measured directly; it is calculated with the Friedewald equation: total cholesterol minus HDL minus one-fifth of your triglycerides.

That one-fifth is a fixed guess at the cholesterol in your VLDL. When triglycerides climb, the guess drifts, and the equation subtracts too much, so calculated LDL reads lower than the real number. 6 Above 400 mg/dL triglycerides the estimate is no longer considered valid, and many labs stop reporting a calculated LDL. 1 Non-HDL skips that subtraction entirely, so it keeps counting the triglyceride-rich remnants that the falsely low LDL leaves out.

How calculated LDL and non-HDL diverge as triglycerides rise
Calculated LDL (Friedewald)Non-HDL
Cholesterol (mg/dL)TG 100TG 200TG 300TG 400TG 500Above TG 400, LDL calc unreliable
Illustrative. The Friedewald equation subtracts a fixed one-fifth of triglycerides as VLDL cholesterol, so as triglycerides climb the calculated LDL reads progressively too low while non-HDL keeps counting the triglyceride-rich remnants; above 400 mg/dL triglycerides the calculation is unreliable and often not reported. The x-axis is triglycerides in mg/dL. Shape grounded in Friedewald 1972 [[6]] and the 2018 AHA/ACC guideline [[1]].

Non-HDL also survives a non-fasting sample. Eating raises triglycerides for a few hours, which throws off calculated LDL but barely moves non-HDL, one reason a European expert panel concluded that fasting is not routinely required for a lipid panel. 5

The 2018 AHA/ACC cholesterol guideline makes the same point (atherogenic just means plaque-forming). 1

Bundled together as non-HDL-C, the cholesterol in LDL plus VLDL is more atherogenic than either particle counted on its own.

Paraphrasing the 2018 AHA/ACC/Multisociety Blood Cholesterol Guideline [[1]]

What LDL, non-HDL, and apoB each count

LDL-CThe default, but can read falsely low when triglycerides are high
the usual number
What it countsCholesterol inside LDL particles only
Fasting neededOften, when it is calculated
Separate order or costOn every panel, no extra cost
Reads best whenTriglycerides are normal
Non-HDL✓ Already on your report, counts every apoB particle, no fasting
total minus HDL
What it countsCholesterol in every apoB particle: LDL, VLDL, IDL, remnants, Lp(a)
Fasting neededNo
Separate order or costFree, it is total minus HDL
Reads best whenTriglycerides are high or you did not fast
ApoBThe most direct particle count, but a separate blood test
particle count
What it countsThe number of apoB particles, one apoB per particle
Fasting neededNo
Separate order or costSeparate test, not always covered by insurance
Reads best whenYou want a direct particle count
What each lipid number captures. Non-HDL and apoB both count all the artery-clogging particles; LDL alone can understate them when triglycerides are high. Sources: 2019 ESC/EAS [[2]] and 2018 AHA/ACC [[1]].

What is a normal non-HDL level?

For most adults, non-HDL under 130 mg/dL is the general target. Above that, the categories climb in the same steps as LDL, shifted up by 30 mg/dL.

Non-HDL cholesterolCategory
Under 130 mg/dLDesirable (general target)
130 to 159 mg/dLAbove optimal
160 to 189 mg/dLBorderline high
190 to 219 mg/dLHigh
220 mg/dL and aboveVery high

Those categories describe the general population. If you already have heart disease, diabetes with organ damage, or another reason your risk runs high, guidelines set the bar lower.

+30Your non-HDL goal sits about 30 mg/dL above your matching LDL goalAn LDL goal under 100 pairs with non-HDL under 130
  • General target: under 130 mg/dL. 3
  • High cardiovascular risk: under 100 mg/dL. 2
  • Very high risk, such as established heart disease or diabetes with organ damage: under 85 mg/dL. 2

A high non-HDL means more cholesterol is riding in plaque-building particles, which raises the long-term odds of a heart attack or stroke. It does not diagnose anything on its own; it is one input your clinician folds into an overall risk estimate. In people already taking a statin, the non-HDL that remains tracks leftover risk more closely than the LDL does. 4

How is non-HDL tested, and how often?

There is nothing separate to order. Any standard lipid panel reports total cholesterol and HDL, and non-HDL is the difference, so it costs no extra blood and no extra fee whether or not the lab prints it. Because eating does not distort it, you can have the draw without fasting. 5

How often to check depends on your age, your risk, and your last result, which is a conversation for your clinician. If high cholesterol runs in your family, that is worth raising, since some inherited patterns push these numbers up early. For a walkthrough of every line on the report, see how to read a lipid panel.

Have your total cholesterol and HDL in front of you? Subtract to see your non-HDL and where it lands against the targets.

Interactive

Your non-HDL cholesterol

The closest stand-in for apoB you can get from a standard panel. Nothing leaves your browser.

Enter your total and HDL cholesterol to see your non-HDL.

Educational, not a diagnosis. Non-HDL is a useful proxy, not a substitute for clinical assessment or for a direct apoB test where one is indicated. Bands describe the value, not you.

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Citations
  1. 2018 AHA/ACC/Multisociety Guideline on the Management of Blood Cholesterol (Grundy SM et al.), Circulation 2019;139(25):e1082-e1143
  2. 2019 ESC/EAS Guidelines for the Management of Dyslipidaemias (Mach F et al.), European Heart Journal 2020;41(1):111-188
  3. NCEP ATP III Final Report (NIH/NHLBI Expert Panel), Circulation 2002;106(25):3143-3421
  4. Boekholdt SM et al. Association of LDL-C, non-HDL-C, and apoB with cardiovascular risk among statin-treated patients: a meta-analysis. JAMA 2012;307(12):1302-1309
  5. Nordestgaard BG et al. Fasting is not routinely required for determination of a lipid profile (EAS/EFLM Joint Consensus). Eur Heart J 2016;37(25):1944-1958
  6. Friedewald WT, Levy RI, Fredrickson DS. Estimation of LDL cholesterol without the preparative ultracentrifuge. Clin Chem 1972;18(6):499-502

Educational context only, not medical advice or a diagnosis. Always discuss your results with a clinician.

What a result like this can point to
High cholesterol: what your result actually means

Associations to explore with a clinician, not a diagnosis from a single number.

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