Porter Health
Understanding HDL Cholesterol
The "Good" Cholesterol - Your Heart's Cleanup Crew
HDL (High-Density Lipoprotein) cholesterol is called "good" cholesterol because it acts like a cleanup crew - removing excess cholesterol from your arteries and taking it back to your liver for disposal.
How HDL Protects Your Heart:
Reverse Cholesterol Transport
HDL picks up cholesterol FROM your arteries and blood vessel walls, preventing plaque buildup.
Carries cholesterol to the liver
Your liver breaks down the cholesterol and removes it from your body.
Additional protective effects
HDL reduces inflammation, prevents blood clots, and repairs damaged blood vessel walls.
Think of HDL like a vacuum cleaner: The more HDL you have, the more efficiently your body cleans excess cholesterol from your arteries. Higher HDL = Lower heart disease risk.
Unlike LDL (where lower is better), with HDL, higher is better. HDL levels are measured in mg/dL:
Low HDL (Increased Risk)
Men: < 40 mg/dL | Women: < 50 mg/dL
Low HDL is a major risk factor for heart disease. Even if your LDL is normal, low HDL increases your cardiovascular risk.
Why It Matters:
For every 1 mg/dL decrease in HDL, cardiovascular risk increases by 2-3%. Low HDL often occurs with:
- High triglycerides (metabolic syndrome)
- Type 2 diabetes
- Sedentary lifestyle
- Smoking
- Obesity (especially belly fat)
Acceptable HDL
40-59 mg/dL
This range provides some protection, but higher is better. Lifestyle changes can help raise HDL into the optimal range.
Optimal HDL (Protective)
≥ 60 mg/dL
HDL ≥ 60 mg/dL is considered protective against heart disease. Some studies suggest optimal levels may be even higher (70-80 mg/dL).
Benefit: HDL ≥ 60 mg/dL is such a strong protective factor that it can subtract 1 risk point from your cardiovascular risk score.
Important Note:
While higher HDL is generally better, extremely high HDL (> 100 mg/dL) may not provide additional benefit and could indicate a genetic condition. What matters most is the ratio of total cholesterol to HDL (ideal ratio < 3.5) or LDL to HDL ratio (ideal < 2).
Lifestyle changes are the most effective way to raise HDL. Here are proven strategies:
1. Exercise Regularly (Most Effective!)
Effect: Can raise HDL by 5-10% (or 3-5 mg/dL)
Aerobic exercise is the single best way to raise HDL. The more you exercise, the more HDL increases.
Exercise Goals:
- Moderate intensity: 150 minutes per week (30 min, 5 days)
- Or vigorous: 75 minutes per week (running, HIIT, cycling)
- Best for HDL: Longer duration at moderate intensity (e.g., 45-60 min walks)
- Add resistance training 2 days per week for additional benefit
2. Lose Weight (if overweight)
Effect: For every 6 lbs lost, HDL increases by about 1 mg/dL
Losing belly fat (visceral fat) is especially important for raising HDL and lowering triglycerides.
Goal: 5-10% weight loss (e.g., 10-20 lbs if you weigh 200 lbs)
3. Quit Smoking
Effect: Can raise HDL by 5-10 mg/dL within weeks of quitting
Smoking lowers HDL and damages blood vessels. Quitting improves HDL and provides immediate cardiovascular benefits.
4. Choose Healthy Fats
Effect: Can raise HDL by 2-5 mg/dL
Replace saturated fats with:
- Monounsaturated fats: Olive oil, avocado oil, nuts (almonds, cashews), avocados
- Omega-3 fats: Fatty fish (salmon, mackerel, sardines), walnuts, flaxseeds, chia seeds
- Limit saturated fat to < 5-6% of calories
5. Reduce Refined Carbohydrates and Sugar
Effect: Lowering carbs raises HDL by 2-5 mg/dL (also lowers triglycerides)
Reduce or eliminate:
- Sugary drinks (soda, juice, sweet tea)
- White bread, white rice, pastries
- Sweets and desserts
- Processed snack foods
Replace with: Whole grains, fruits, vegetables, beans
6. Moderate Alcohol (Controversial)
Effect: Moderate drinking may raise HDL by 2-4 mg/dL
Moderate alcohol (1 drink/day for women, 2/day for men) may raise HDL slightly. However:
⚠️ Important Caution:
- Excessive alcohol raises triglycerides and blood pressure
- Don't start drinking just to raise HDL - other methods are safer
- If you don't drink, don't start. If you do, keep it moderate.
7. Omega-3 Fish Oil Supplements
Effect: May raise HDL by 1-3 mg/dL (mainly lowers triglycerides)
Omega-3 supplements (1-2 grams daily) provide modest HDL benefit. More effective for lowering triglycerides.
Best sources: EPA and DHA from fish oil. Eat fatty fish 2-3 times per week for food-based omega-3s.
Unfortunately, no medications are specifically approved to raise HDL. Lifestyle changes are your best option. However, some treatments may help:
Niacin (Vitamin B3)
Effect: Can raise HDL by 15-35% (10-25 mg/dL)
High-dose niacin (1-2 grams daily) was previously used to raise HDL, but studies showed it didn't reduce cardiovascular events when added to statins.
Side effects: Flushing (hot, red face), itching, liver toxicity at high doses
Rarely prescribed now due to lack of cardiovascular benefit and side effects.
Fibrates (Fenofibrate, Gemfibrozil)
Effect: Can raise HDL by 10-20% (mainly lower triglycerides)
Fibrates are mainly used for high triglycerides but can modestly raise HDL. Best for patients with high triglycerides + low HDL.
Note: Cardiovascular benefit is unclear. Mainly used when triglycerides are very high.
Statins (Modest HDL Increase)
Effect: Raise HDL by 5-10% (2-5 mg/dL)
Statins primarily lower LDL but also provide a small HDL boost. Cardiovascular benefits come mainly from LDL reduction.
Why Don't HDL-Raising Drugs Work?
Clinical trials of HDL-raising medications (CETP inhibitors, niacin) failed to reduce heart attacks or strokes. Scientists now believe HDL function (how well it removes cholesterol) matters more than HDL number.
Bottom line: Focus on lifestyle changes to raise HDL naturally - these improve HDL function AND reduce cardiovascular risk.
While HDL is important, there are some nuances to understand:
1. HDL Doesn't Tell the Whole Story
Some people with high HDL still develop heart disease, while others with low HDL remain healthy. LDL cholesterol is a stronger predictor of cardiovascular risk than HDL.
2. HDL Function Matters More Than Number
Not all HDL is equally protective. "Dysfunctional" HDL (common in diabetes, inflammation) may not protect against heart disease even if the number is high.
3. Very High HDL May Not Be Beneficial
Extremely high HDL (> 100 mg/dL) doesn't provide extra protection and may indicate a genetic condition. Optimal range is 60-80 mg/dL.
4. Ratios Are More Important
The total cholesterol/HDL ratio or LDL/HDL ratio is a better predictor than HDL alone:
- Total Cholesterol / HDL: Ideal < 3.5 (e.g., 180/60 = 3.0)
- LDL / HDL: Ideal < 2.0 (e.g., 100/60 = 1.67)
Use this checklist to guide your conversation about HDL cholesterol:
HDL is "good" because it removes cholesterol FROM arteries (reverse cholesterol transport)
Higher HDL is better - target ≥ 60 mg/dL for protection (men ≥ 40, women ≥ 50 minimum)
Exercise is the most effective way to raise HDL (5-10% increase with regular aerobic activity)
Weight loss, quitting smoking, and healthy fats can raise HDL by 2-10 mg/dL
Medications to raise HDL have NOT been proven to reduce heart attacks/strokes
HDL function matters more than HDL number - lifestyle changes improve both
Focus on lowering LDL if HDL is low - LDL is a stronger predictor of cardiovascular risk
Cholesterol ratios (Total/HDL < 3.5, LDL/HDL < 2) are better predictors than HDL alone
References:
Based on the 2026 ACC/AHA Guideline on the Management of Dyslipidemia and the AHA/ACC 2019 Guideline on the Primary Prevention of Cardiovascular Disease. This guide translates the latest clinical guidelines into patient-friendly language to help you understand HDL cholesterol.
Blumenthal RS, Morris PB, Gaudino M, et al. 2026 ACC/AHA/AACVPR/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA Guideline on the Management of Dyslipidemia. J Am Coll Cardiol. 2026. doi:10.1016/j.jacc.2025.11.016
National Lipid Association Recommendations for Patient-Centered Management of Dyslipidemia: Part 1—Full Report. J Clin Lipidol. 2015;9(2):129-169. doi:10.1016/j.jacl.2015.02.003