Cholesterol Levels Chart by Age: LDL, HDL, and Triglycerides Explained

What Is Cholesterol and Why Does It Matter?

Cholesterol is a waxy, fat-like substance (lipid) that your body needs to build cells, produce hormones, and make vitamin D. It travels through your bloodstream inside protein-wrapped packages called lipoproteins.

Cholesterol comes from two sources:

• Endogenous (body-produced): The liver manufactures about 75–80% of your total blood cholesterol
• Exogenous (dietary): The remaining 20–25% comes from animal-based foods

The problem isn’t cholesterol itself — it’s the type and the amount. When certain forms of cholesterol build up excessively in artery walls, they trigger inflammation and plaque formation that narrows vessels and can lead to heart attack or stroke.

LDL vs. HDL: What’s the Difference?

These two lipoproteins behave in opposite ways:

LDL — Low-Density Lipoprotein (“Bad” Cholesterol) LDL carries cholesterol from the liver to cells throughout the body. When LDL levels are too high, excess cholesterol is deposited onto artery walls, forming plaques that harden and narrow the vessels — a process called atherosclerosis. This restricts blood flow and raises the risk of heart attack and stroke.

HDL — High-Density Lipoprotein (“Good” Cholesterol) HDL acts as a cleanup crew. It picks up excess cholesterol from artery walls and carries it back to the liver for processing and elimination. Higher HDL levels are associated with lower cardiovascular disease risk. HDL above 60 mg/dL is considered protective.

Triglycerides A third type of fat measured in cholesterol panels. The body converts excess calories — especially from sugars and refined carbohydrates — into triglycerides stored in fat cells. High triglycerides, particularly combined with low HDL, significantly increase cardiovascular risk.

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Total Cholesterol Reference Ranges

Category	Total Cholesterol	Risk Level
Desirable	Below 200 mg/dL	Low risk
Borderline High	200–239 mg/dL	Moderate risk
High	240 mg/dL and above	High risk

Note: Total cholesterol alone is a blunt tool. You can have a “borderline” total cholesterol of 210 mg/dL with very high HDL (which is actually favorable) or a “desirable” total of 190 mg/dL with dangerously low HDL and high LDL (which is concerning).

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LDL Cholesterol Reference Ranges

Category	LDL Level	Clinical Interpretation
Optimal	Below 100 mg/dL	Ideal for all adults
Near Optimal	100–129 mg/dL	Acceptable if no risk factors
Borderline High	130–159 mg/dL	Lifestyle intervention indicated
High	160–189 mg/dL	Drug therapy often recommended
Very High	190 mg/dL and above	Drug therapy usually required

For high-risk patients (known heart disease, diabetes, or multiple risk factors), guidelines recommend LDL below 70 mg/dL. For very high-risk patients who have had a heart attack, targets below 55 mg/dL may be recommended.

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HDL Cholesterol Reference Ranges

Category	HDL Level	Clinical Interpretation
Protective	60 mg/dL or higher	Reduces overall heart disease risk
Acceptable	40–59 mg/dL (men); 50–59 mg/dL (women)	Average range
Low — High Risk	Below 40 mg/dL (men); Below 50 mg/dL (women)	Major risk factor for heart disease

HDL below 35 mg/dL is considered dangerously low and a significant independent risk factor regardless of other cholesterol values.

Women naturally have higher HDL than men due to estrogen’s effect on cholesterol metabolism. After menopause, HDL tends to decrease and LDL tends to increase.

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Triglyceride Reference Ranges

Category	Triglyceride Level	Clinical Interpretation
Normal	Below 150 mg/dL	Low risk
Borderline High	150–199 mg/dL	Lifestyle modification advised
High	200–499 mg/dL	Associated with elevated cardiovascular risk
Very High	500 mg/dL and above	Risk of pancreatitis; drug therapy required

Triglycerides are highly responsive to diet and lifestyle. A single high-carbohydrate or high-alcohol meal before testing can temporarily elevate triglycerides significantly, which is why fasting for 9–12 hours is required for an accurate lipid panel.

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Total Cholesterol to HDL Ratio

The ratio of total cholesterol divided by HDL is a useful single-number cardiovascular risk indicator:

Ratio	Risk Level
3.5 or below	Optimal — low risk
3.6–4.5	Average risk
Above 4.5	High heart disease risk
Above 6.0	Very high risk — intervention strongly indicated

How to calculate: If your total cholesterol is 210 and your HDL is 60, your ratio is 210 ÷ 60 = 3.5 (optimal).

This ratio matters because it captures the relationship between harmful and protective cholesterol. A patient with total cholesterol of 230 mg/dL and HDL of 80 mg/dL has a ratio of 2.9 — excellent. A patient with total cholesterol of 180 mg/dL and HDL of 30 mg/dL has a ratio of 6.0 — very high risk despite the “normal” total.

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Cholesterol Levels by Age and Sex

Cholesterol naturally shifts over the lifespan. These are general guidelines:

Men

Age Group	Desirable Total Cholesterol	LDL Target	HDL Goal
Under 20	<170 mg/dL	<110 mg/dL	>45 mg/dL
20–39	<200 mg/dL	<130 mg/dL	>40 mg/dL
40–59	<200 mg/dL	<100 mg/dL	>40 mg/dL
60 and older	<200 mg/dL	<100 mg/dL	>40 mg/dL

Women

Age Group	Desirable Total Cholesterol	LDL Target	HDL Goal
Under 20	<170 mg/dL	<110 mg/dL	>45 mg/dL
20–39	<200 mg/dL	<130 mg/dL	>50 mg/dL
40–59	<200 mg/dL	<100 mg/dL	>50 mg/dL
60 and older	<200 mg/dL	<100 mg/dL	>50 mg/dL

Key age-related changes:

• Men over 45 face significantly elevated cardiovascular risk from age alone
• Women over 55 (or with premature menopause) see LDL rise and HDL fall after estrogen declines
• Both sexes see increasing cardiovascular risk accumulate with age, making earlier intervention more valuable

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What Causes High Cholesterol?

Dietary Factors

The average American consumes 500–900 mg of dietary cholesterol daily — two to three times the recommended maximum of 300 mg. More importantly, the type of fat consumed matters:

Saturated fats (butter, lard, fatty meats, coconut oil, full-fat dairy) raise LDL cholesterol most directly. These fats are solid at room temperature and come primarily from animal sources.

Trans fats (partially hydrogenated vegetable oils) are the most harmful dietary fat — they raise LDL and simultaneously lower HDL. Found in some processed foods, baked goods, and fried items.

Monounsaturated fats (olive oil, avocado, nuts) do not raise LDL and may raise HDL modestly. Mediterranean populations consuming high levels of olive oil show lower rates of cardiovascular disease.

Polyunsaturated fats (vegetable oils, fish oil) lower LDL when substituted for saturated fats. Omega-3 fatty acids also significantly lower triglycerides.

Non-Dietary Factors

Factor	Effect on Cholesterol
Genetics / family history	Can cause severe LDL elevation regardless of diet
Obesity	Raises LDL and triglycerides; lowers HDL
Physical inactivity	Lowers HDL, raises triglycerides
Smoking	Damages arterial walls; lowers HDL
Type 2 diabetes	Raises triglycerides; lowers HDL
Hypothyroidism	Raises LDL significantly
Kidney disease	Raises triglycerides; lowers HDL
Polycystic ovary syndrome (PCOS)	Raises LDL, lowers HDL
Certain medications	Steroids, beta-blockers, retinoids can elevate LDL

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Major Risk Factors for Heart Disease from Cholesterol

High LDL is dangerous but not the only risk factor. The more of these you have, the more aggressively cholesterol should be managed:

• Age: Men 45+, women 55+
• Family history: First-degree relative with heart attack before age 55 (men) or 65 (women)
• Smoking: Current cigarette smoking
• High blood pressure: 140/90 mmHg or higher, or on blood pressure medication
• Low HDL: Below 40 mg/dL
• Diabetes: Type 1 or type 2
• Obesity: BMI over 30
• Prior cardiovascular event: Heart attack, stroke, or peripheral artery disease

Each additional risk factor lowers the threshold at which cholesterol treatment becomes indicated.

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How to Improve Your Cholesterol Numbers

Diet Changes

• Reduce saturated fat to less than 7% of total calories
• Eliminate trans fats where possible
• Increase soluble fiber: oats, barley, legumes, apples, and psyllium husk bind cholesterol in the gut
• Add plant sterols/stanols (found in fortified margarine and some juices) — lower LDL by 10–15%
• Eat fatty fish (salmon, sardines, mackerel) 2x weekly for triglyceride reduction
• Replace refined carbohydrates with whole grains to lower triglycerides

Lifestyle Changes

• Exercise: 150 minutes per week of moderate aerobic activity raises HDL by 5–10% on average
• Weight loss: Every 10 pounds lost lowers LDL by approximately 8 mg/dL
• Stop smoking: HDL rises by 4 mg/dL within one year of quitting
• Limit alcohol: Excessive drinking raises triglycerides significantly

When Medication Is Needed

Statins (atorvastatin, rosuvastatin, simvastatin) are the first-line drug treatment and can lower LDL by 30–50%. Other options include:

• Ezetimibe (lowers cholesterol absorption in the gut)
• PCSK9 inhibitors (injectable; 50–60% LDL reduction; for high-risk patients)
• Fibrates (primarily lower triglycerides)
• Niacin (raises HDL but with significant side effects)

The decision to start medication should be based on overall cardiovascular risk, not just cholesterol numbers alone. Discuss your complete risk profile with your doctor.

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For other key blood test values, see our complete blood test reference ranges chart. To understand how cholesterol testing works and how to prepare, see our blood test preparation guide.