Your cholesterol test came back with four numbers: total cholesterol 228, LDL 148, HDL 52, triglycerides 140. One is flagged as high. Your doctor mentions “risk” and “statins” in the same sentence. Before that conversation, it helps to know what each number represents and how they are used together.
A lipid panel is one of the most common blood tests for adults, and it plays a central role in assessing the risk of heart attack and stroke. But the numbers are only part of the picture.
Key Takeaways
- LDL cholesterol is the main target in most treatment guidelines; lower is generally better for cardiovascular risk.
- HDL cholesterol is associated with lower risk, but raising HDL with medication has not been shown to reduce heart attacks.
- Triglycerides rise after meals and with alcohol, high-sugar diets, excess weight and poorly controlled diabetes.
- Treatment decisions are based on overall cardiovascular risk — age, blood pressure, smoking, diabetes and family history — not on cholesterol alone.
This article is general information. Your own lab’s reference ranges and your clinician’s assessment should guide decisions.
What a lipid panel measures
Total cholesterol is the overall amount of cholesterol in your blood, carried in several types of lipoprotein particles.
LDL cholesterol (low-density lipoprotein) is the cholesterol carried in particles that can enter artery walls and contribute to plaque buildup. It is often called “bad cholesterol.”
HDL cholesterol (high-density lipoprotein) is carried in particles involved in moving cholesterol away from tissues. Higher levels are associated with lower risk, which is why it is called “good cholesterol.”
Triglycerides are a type of fat in the blood that the body uses for energy. Levels rise after eating.
Commonly used categories
US categories for adults, in milligrams per deciliter, are commonly described as follows:
LDL cholesterol
- Under 100: optimal
- 100–129: near optimal
- 130–159: borderline high
- 160–189: high
- 190 and above: very high
HDL cholesterol
- Under 40 for men or under 50 for women: low, associated with higher risk
- 60 and above: associated with lower risk
Triglycerides
- Under 150: normal
- 150–199: borderline high
- 200–499: high
- 500 and above: very high
These categories are useful reference points, but treatment targets depend on your overall risk. Someone who has had a heart attack may be advised to lower LDL far below 100.
Non-HDL cholesterol
Non-HDL cholesterol is simply total cholesterol minus HDL. It captures cholesterol in all the particles that can contribute to plaque, including LDL and particles rich in triglycerides.
For many people, especially those with high triglycerides or diabetes, non-HDL is a useful additional measure. A common desirable level is under 130 mg/dL, about 30 points above the LDL goal.
Do you need to fast?
Traditionally, lipid panels were done after a 9 to 12 hour fast. Many guidelines now accept non-fasting tests for routine screening, because total cholesterol, LDL and HDL change little after a normal meal. Triglycerides do rise after eating, so a fasting test may be requested if triglycerides are high or to confirm a result.
Follow your clinician’s instructions for your specific test.
Why overall risk matters more than a single number
Cholesterol is one of several risk factors for heart attack and stroke. Others include:
- Age and sex
- Blood pressure
- Smoking
- Diabetes
- Kidney disease
- Family history of early heart disease
- Inflammatory conditions
Clinicians often use risk calculators that combine these factors to estimate your chance of a cardiovascular event over the next ten years. The result helps decide whether lifestyle changes alone are enough or whether medication such as a statin is recommended.
Two people with the same LDL can have very different risks. A 45-year-old non-smoker with normal blood pressure and an LDL of 150 has a different profile from a 65-year-old smoker with diabetes and the same LDL.
Additional tests that sometimes help
When risk is uncertain, clinicians may consider:
- Lipoprotein(a), a genetically determined particle linked to higher risk. Many experts recommend measuring it at least once in adulthood.
- Apolipoprotein B (ApoB), which counts the number of atherogenic particles.
- Coronary artery calcium (CAC) scoring, a CT scan that detects calcified plaque.
What lifestyle changes typically do
Lifestyle changes have the biggest effect on triglycerides and a moderate effect on LDL:
- Reducing saturated fat and replacing it with unsaturated fats can lower LDL.
- Increasing soluble fiber, from foods such as oats, beans and lentils, can modestly lower LDL.
- Reducing added sugars, refined carbohydrates and alcohol can lower triglycerides substantially.
- Weight loss and regular physical activity can lower triglycerides and slightly raise HDL.
When LDL is very high — 190 or above — genetic conditions such as familial hypercholesterolemia are possible, and medication is usually recommended.
Questions to ask your clinician
- What is my estimated 10-year cardiovascular risk?
- What LDL level should I aim for, given my risk?
- Would lipoprotein(a), ApoB or a calcium score change your recommendation?
- How much could lifestyle changes realistically lower my numbers?
- If medication is recommended, what are the benefits and side effects for someone like me?
Frequently Asked Questions
Is high HDL always protective? Very high HDL levels have not been shown to provide extra protection, and drugs that raise HDL have not reduced heart attacks.
Can thin people have high cholesterol? Yes. Genetics strongly influences cholesterol levels.
How often should cholesterol be checked? Adults are typically checked every few years if results are normal, more often if they have risk factors or are on treatment. Ask your clinician.
Does dietary cholesterol raise blood cholesterol? For most people, saturated fat has a larger effect than dietary cholesterol, though responses vary.
The bottom line
Your lipid panel is a starting point for a risk conversation, not a verdict. Know your LDL, HDL, triglycerides and non-HDL numbers, but ask about your overall risk before deciding what to do about them.