The claim
“Filtered coffee is better for your heart than espresso — because of the cholesterol.”
This is a widely cited dietary rule of thumb in nutrition circles. As an advertising health claim for a food product it would be too broad under EU law — but as a scientific observation about coffee preparation and LDL-related markers, the underlying evidence is reasonably solid.
What the evidence actually shows
The mechanism: cafestol and kahweol
Coffee contains the diterpenes cafestol and kahweol. These compounds are associated in the literature with elevated LDL-related blood markers and are considered the plausible mechanism behind differences observed between brewing methods.
Quantified: per 1 mg of daily cafestol intake, older studies described an LDL increase of approximately 0.19 mg/dL. This is a study finding for the marker LDL — not an approved health claim.
Brewing methods compared
The central question is how much cafestol ends up in the cup:
| Method | Cafestol concentration |
|---|---|
| Paper filter (drip) | ~11 mg/L (very low) |
| Espresso | variable, often 200–500 mg/L |
| French press | medium to high |
| Scandinavian boiled coffee | up to 939 mg/L (very high) |
| Office coffee machine (metal filter) | often several times higher than paper filter |
Paper filters are the key variable: they physically retain cafestol and kahweol. Metal filters (French press, many office machines) do not.
How large is the effect?
A 2025 analysis (Iggman et al.) modelled that switching from metal-filtered office coffee to paper-filtered coffee could explain LDL-related differences in the order of approximately 0.58 mmol/L. Such modelling is informative but does not constitute a claim to reduce cardiovascular disease risk.
Direct comparisons with other dietary interventions are limited by different study designs, populations, and endpoints.
Espresso: not as bad as boiled coffee — but usually higher in diterpenes than paper-filtered
Espresso sits between the extremes. Cafestol concentration in espresso can be relatively high, but the portion size is small (25–30 ml versus 200 ml). Regular consumption of several espressos per day still results in higher average diterpene intake compared to the same number of cups of paper-filtered coffee.
A Norwegian study (Christensen et al. 2022, Open Heart) found an association between regular espresso consumption and higher cholesterol values — particularly in certain subgroups. This is an epidemiological observation, not a clinical recommendation.
EFSA status
EFSA has not published any specific approved health claim regarding coffee brewing methods and cholesterol. The science on cafestol and kahweol is well-established, but it cannot simply be translated into a marketing claim about cardiovascular health.
Verdict
Supported — as a scientific observation, not as a health claim. The difference between filtered and unfiltered coffee in terms of diterpene exposure is well documented, and its association with LDL-related markers is consistent across the literature. For communication in the EU context, the appropriate approach is a factual description of the evidence — not a claim to reduce cardiovascular risk.
In practical terms: anyone reconsidering their coffee preparation has grounds to choose paper-filtered as a lower-diterpene option. Medical decisions about abnormal blood lipids remain in the domain of clinical care.