Modern Healthspan|05. Juni
Why I'm Switching Back to Paper Filters After This Study
How Coffee Brewing Methods Affect Your Cholesterol
- Key Insight: The way you brew coffee can impact your cholesterol levels, particularly LDL-C. This is due to natural lipid compounds (diterpenes) in coffee beans, specifically cafestol and kahweol.
- Study Findings: Data from a 20-year Norwegian study with over 500,000 participants show:
- Unfiltered coffee (e.g., French press, boiled coffee) is linked to higher cardiovascular mortality, especially in men over 60.
- Filtered coffee (paper filter) is associated with lower mortality compared to drinking no coffee at all.
- The primary mechanism is an increase in total cholesterol, particularly LDL cholesterol (about 0.49 mmol/L or 18.95 mg/dL), and triglycerides.
- A mild rise in liver enzymes (ALT) indicates altered cholesterol processing in the liver.
- Observational nature: Relies on self-reported dietary data, introducing potential errors.
- Individual variability: Genetic differences affect how people respond to cafestol.
- Paper filters (drip, pour-over): Remove nearly all oils → neutral effect on blood lipids.
- Instant coffee: Contains negligible amounts of cafestol and kahweol → neutral.
- Metal mesh or no filter (French press, Scandinavian boiled coffee): Contains up to 30 times more diterpenes than paper-filtered coffee → significant impact on blood lipids.
- Espresso: High concentration per volume, but due to small serving size (25–50 ml), the absolute dose is moderate.
- Americano: Same cafestol content as the espresso shot used.
- Pod and capsule machines: Similar to espresso.
- Paper filters: Emphasize floral and caramel notes, brighter acidity, but thinner mouthfeel (less body).
- Metal filters: Richer aromas (fruity, nutty, chocolatey), more body and sweetness, but negative impact on blood lipids.
For individuals with high cholesterol or those aiming for optimal cardiovascular health, switching to paper-filtered coffee or instant coffee is an evidence-based intervention. This involves a trade-off: less body and sweetness for better lipid profiles.
Author's Personal NoteThe author, after years of using a metal filter, is switching back to a paper filter to test whether the health benefits outweigh any perceived taste differences.
Conclusion: Your daily coffee brewing choice can have a long-term impact on your health.
