How to increase good cholesterol
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Strategies to Increase Good Cholesterol (HDL)
High-density lipoprotein (HDL) cholesterol, often referred to as "good cholesterol," plays a crucial role in cardiovascular health by transporting cholesterol from the arteries to the liver for excretion. Increasing HDL levels can reduce the risk of coronary disease and cardiovascular events. Here are some effective strategies to boost HDL cholesterol based on recent research findings.
Cholesteryl Ester Transfer Protein (CETP) Inhibition
CETP Inhibitors and HDL Levels
Inhibition of cholesteryl ester transfer protein (CETP) has been explored as a method to significantly increase HDL cholesterol levels. CETP inhibitors like torcetrapib have shown the potential to raise HDL levels by over 70% in clinical trials. However, despite the marked increase in HDL, the ILLUMINATE trial was halted due to increased mortality and morbidity, attributed to off-target toxicity1. This highlights the complexity and potential risks associated with pharmacological interventions targeting HDL.
Exercise and HDL Cholesterol
Aerobic and Resistance Training
Physical activity is a well-documented method to increase HDL cholesterol. A study comparing different types of exercise found that both aerobic and resistance training significantly increased HDL levels, with the greatest improvements observed in combined aerobic and resistance training programs2. Regular exercise not only increases HDL quantity but also enhances HDL functionality, including its antioxidant and cholesterol efflux capacities4.
Exercise Intensity and Frequency
The intensity and frequency of exercise also play a role in HDL improvement. Middle-aged women engaging in high-intensity exercise showed a 17% increase in HDL levels and improved HDL quality, including larger particle size and higher antioxidant ability4. This suggests that more vigorous and consistent exercise routines may yield better results in enhancing HDL cholesterol.
Dietary Interventions
Carbohydrate-Restricted Diets and Egg Consumption
Dietary modifications can also influence HDL levels. A study on overweight men consuming a carbohydrate-restricted diet (CRD) found that adding dietary cholesterol from eggs significantly increased HDL levels without adversely affecting LDL cholesterol3. This indicates that specific dietary choices, such as incorporating eggs into a low-carbohydrate diet, can be beneficial for raising HDL cholesterol.
Low-Saturated-Fat Diets
The National Cholesterol Education Program (NCEP) recommends a low-saturated-fat, low-cholesterol diet to manage cholesterol levels. While weight loss from such diets alone did not significantly change HDL levels, combining the diet with regular exercise resulted in a notable increase in HDL cholesterol, particularly in men5. This underscores the importance of integrating dietary changes with physical activity for optimal HDL improvement.
Conclusion
Increasing HDL cholesterol involves a multifaceted approach that includes pharmacological interventions, regular exercise, and dietary modifications. While CETP inhibitors have shown promise, their associated risks necessitate caution. On the other hand, consistent physical activity, especially combined aerobic and resistance training, and specific dietary choices like carbohydrate-restricted diets with added eggs, have proven effective in raising HDL levels. Integrating these strategies can help enhance cardiovascular health by boosting good cholesterol.
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