Archive · 10 Nov 2025
Brewing Method Significantly Impacts Coffee's Health Benefits and Longevity
Imagine coffee has tiny natural oils that can sometimes make your body's bad cholesterol go up.
When you brew coffee with a paper filter, like in a regular drip coffee maker, most of those oils get caught in the paper.
But, if you use a metal filter, like in a French press or espresso machine, those oils can slip through into your cup.
Studies show that drinking coffee made with paper filters might help people live longer because it doesn't raise their cholesterol as much.
Even instant coffee is usually fine because it's made in a way that filters out most of those oils.
So, how you make your coffee can change its effect on your health!
Filtered coffee, using paper filters, is linked to lower LDL cholesterol and reduced long-term cardiovascular risk.
Unfiltered brewing methods like French press and espresso allow cholesterol-raising compounds (diterpenes) to enter the cup.
Large studies indicate that filtered coffee drinkers have lower mortality rates than those who drink unfiltered coffee or no coffee.
Instant coffee is considered a heart-friendly option as it is made from pre-filtered coffee with minimal diterpenes.
Traditional South Indian filter coffee methods effectively strain out oily residues, aligning with health-promoting brewing practices.
- Who
- Coffee drinkers, particularly those who consume coffee daily and individuals concerned about heart health.
- What
- The impact of different coffee brewing methods on cholesterol levels, mortality rates, and overall health.
- When
- Research published in European Journal of Preventive Cardiology (2020), Uppsala University and Chalmers University of Technology (2025), and ongoing daily consumption.
- Where
- Global, with specific studies from Norway and Sweden, and cultural examples from South India.
- Why
- To understand how coffee preparation methods influence health outcomes, including longevity and cardiovascular risk.
Filtered Coffee
Unfiltered Coffee
Cholesterol Levels
Filtered Coffee
Paper filters trap diterpenes (cafestol and kahweol), which can elevate LDL cholesterol.
Unfiltered Coffee
Metal filters or espresso machines allow diterpenes to pass through, leading to significantly higher amounts of cafestol and kahweol.
Mortality Rates
Filtered Coffee
Filtered coffee drinkers have lower mortality rates compared to those who drink unfiltered coffee or no coffee at all.
Unfiltered Coffee
Unfiltered brews like French press or espresso are associated with higher mortality rates compared to filtered coffee.
Digestive Impact
Filtered Coffee
Paper-filtered coffee is generally gentler on the stomach and less acidic.
Unfiltered Coffee
Espresso and unfiltered methods produce a dense, acidic brew that can irritate the stomach, especially for those with acid reflux.
- Key Compounds
- Diterpenes (cafestol and kahweol) can elevate LDL cholesterol.
- Filtering Effectiveness
- Paper filters effectively trap diterpenes; metal meshes do not.
- LDL Cholesterol Reduction
- Replacing 3 cups of unfiltered coffee with filtered coffee five days a week can reduce LDL cholesterol by an average of 0.58 mmol/L.
- Long-Term Risk Reduction
- Filtered coffee consumption may lower long-term cardiovascular disease risk by over 10 percent.
- Instant Coffee
- Considered filtered due to its manufacturing process, it contains very low levels of diterpenes.
- South Indian Filter Coffee
- Uses gravity and filters to remove most oily residues, aligning with health benefits.
