Cholesterol Numbers Explained: LDL, HDL, Triglycerides and Non-HDL

By Ferdie Correa · Published October 5, 2026 · Last updated October 5, 2026 · 5 min read

Not medical advice. This article is general education, not a diagnosis or treatment plan. Talk to your doctor or a registered dietitian before making major changes to your diet, training or medication, especially if you have a health condition, are pregnant, or take prescription drugs.

A lipid panel gives you four or five numbers, and each one answers a different question. Two people with identical results can also get different advice, because what counts as "good enough" depends on overall heart risk. This guide walks through a sample report, the standard ranges, and what the evidence says about changing each number.

What a lipid panel reports

Here is an illustrative result for a 48-year-old, followed by what each line means.

Line on the report	Result	What it is
Total cholesterol	212 mg/dL	All cholesterol carried in the blood, in every type of lipoprotein
HDL cholesterol	46 mg/dL	Cholesterol in high-density lipoprotein, which carries cholesterol back to the liver. Higher is generally better.
Triglycerides	160 mg/dL	A type of fat in the blood that rises with excess calories, alcohol, refined carbohydrate and insulin resistance
LDL cholesterol (calculated)	134 mg/dL	Cholesterol in low-density lipoprotein, the main driver of plaque in artery walls
Non-HDL cholesterol	166 mg/dL	Total minus HDL: the cholesterol in all the particles that can contribute to plaque

Most labs calculate LDL rather than measuring it. The classic Friedewald formula is LDL = total − HDL − (triglycerides ÷ 5), which gives 212 − 46 − 32 = 134 in the example. It becomes less accurate when triglycerides are high or LDL is low, so the 2026 ACC/AHA dyslipidemia guideline favors newer methods (the Martin/Hopkins or NIH Sampson equations). Your lab may already use one.

Many labs accept a non-fasting sample for routine checks. Triglycerides rise after a meal, so if they come back high your clinician may repeat the test after an overnight fast.

Reference ranges

These are the long-standing adult categories from the National Cholesterol Education Program, still used on many lab reports and by MedlinePlus and the NHLBI.

Measure (mg/dL)	Desirable	Borderline	High
Total cholesterol	Below 200	200 to 239	240 and above
LDL	Below 100 (100 to 129 near optimal)	130 to 159	160 to 189 high; 190+ very high
HDL	40+ for men, 50+ for women; 60+ is considered protective	Below 40 (men) or 50 (women) is a risk factor
Triglycerides	Below 150	150 to 199	200 to 499 high; 500+ very high
Non-HDL	Below 130	Higher values carry more risk, interpreted like LDL plus 30

To convert to mmol/L (used outside the US), divide cholesterol values by 38.67 and triglycerides by 88.57. An LDL of 100 mg/dL is about 2.6 mmol/L; triglycerides of 150 mg/dL are about 1.7 mmol/L.

Why your target depends on your overall risk

The same LDL means different things for different people. A 35-year-old non-smoker with normal blood pressure and an LDL of 135 is in a very different position from a 62-year-old with diabetes and the same number. The 2026 ACC/AHA guideline makes this explicit:

It recommends estimating 10-year risk with the newer PREVENT equations for adults aged 30 to 79 without known cardiovascular disease.
It brings back LDL goals: below 100 mg/dL for people at borderline or intermediate risk being treated to prevent a first heart attack or stroke, below 70 mg/dL at high risk, and below 55 mg/dL for people with established cardiovascular disease at very high risk.
Non-HDL goals run in parallel: below 130, 100 and 85 mg/dL respectively.
An LDL of 190 mg/dL or more is treated as severe hypercholesterolemia regardless of the risk score.
A coronary artery calcium (CAC) scan can help decide on treatment when risk is uncertain.

This is why a lab's "desirable" flag is only the first step. The number that applies to you comes from a conversation with your clinician about your full risk picture.

Non-HDL and the triglyceride-to-HDL ratio

Non-HDL cholesterol is easy to calculate yourself (total minus HDL) and does not depend on fasting. It captures cholesterol in LDL plus the triglyceride-rich particles that also contribute to plaque, so it is useful when triglycerides are high. In the example, 166 mg/dL is above the 130 desirable mark even though LDL alone looks only mildly raised.

The triglyceride/HDL ratio (160 ÷ 46 = 3.5 in the example) is used in research as a rough marker of insulin resistance. It is not a treatment target in US guidelines, so treat it as a curiosity rather than a goal.

Diet factors: what the evidence supports

Saturated fat. Mayo Clinic notes that cutting saturated fat to under 7% of calories can reduce LDL by 8 to 10%. The AHA suggests aiming for about 5 to 6% of calories for people who need to lower LDL. On 2,000 kcal, 6% is about 13 g a day. The main sources are fatty and processed meats, butter, cheese and full-fat dairy, and many baked goods.
Soluble fiber. 5 to 10 g or more a day lowers LDL, according to Mayo Clinic. Oats, barley, beans, lentils, apples and pears are good sources.
Plant sterols and stanols. About 2 g a day from fortified foods can lower LDL by 5 to 15%. They do not appear to change HDL or triglycerides.
Unsaturated fats. Replacing butter and fatty meat with olive oil, nuts, seeds and fish helps LDL. Omega-3 fats from fish lower triglycerides more than LDL.

Common myths:

"Eggs are off-limits." For most people, saturated fat has a larger effect on blood cholesterol than dietary cholesterol. Eggs can fit, especially in place of processed meats.
"Coconut oil is heart-healthy." It is high in saturated fat and raises LDL.
"Thin people do not need to check." Genetics drive cholesterol too, including familial hypercholesterolemia, which can cause very high LDL at any weight.

How exercise and weight loss change each number

Number	Effect of regular exercise	Effect of weight loss
Triglycerides	Often fall noticeably	Usually the most responsive number
HDL	Modest rise, mostly with sustained aerobic exercise	Small rise once weight stabilizes
LDL	Small change on its own	Modest fall; diet composition matters more

The CDC's prevention advice combines these: a heart-healthy eating pattern, regular activity, a healthy weight, no tobacco, and limited alcohol. If you are starting from scratch, our beginner workout plan and deficit guide are practical first steps.

When medication enters the conversation

Lifestyle changes help everyone, but for many people at higher risk they are not enough on their own. Statins remain first-line treatment, with ezetimibe and other medicines added when goals are not reached. Whether that applies to you is a decision for you and your clinician. Useful questions:

What is my estimated 10-year risk, and which calculator did you use?
Which LDL or non-HDL goal applies to me, and why?
Would a coronary calcium scan change the recommendation?
Should I be tested for lipoprotein(a) or for familial hypercholesterolemia?
How long should I try lifestyle changes before we recheck, and when is the next test?

How FitStatsHub's targets relate to this

The planner's Health Report lists general reference values: total cholesterol under 200, LDL under 100, HDL above 40 (men) or 50 (women), and triglycerides under 150 mg/dL. Those match the desirable categories above. They do not account for your personal risk, and they are not treatment goals. FitStatsHub does not read lab results.

Related reading: fasting glucose and A1C, which often appear on the same blood test.