Brew Method Matters: Filtered vs French Press and Espresso, and Cholesterol

Coffee lovers can debate brew methods for hours: the body of a French press, the intensity of espresso, the clean clarity of a pour-over. Most of that conversation is about flavor. But research shows brew method also changes something less obvious: what natural compounds end up in your cup, and how coffee relates to your cholesterol.

Here's what randomized trials and population studies found, explained without the jargon, plus simple ways to brew with that in mind.

As always, these findings are about coffee in general, not Edge Coffee specifically, and they aren't medical advice. If you're managing cholesterol, your clinician's guidance comes first.

Meet cafestol: the compound behind the brew-method effect

Coffee beans contain natural oily compounds called diterpenes, mainly cafestol and kahweol. Researchers have identified them as the reason coffee can raise serum cholesterol, and the effect varies by brewing method (Svatun et al., Open Heart 2022).

In a randomized controlled trial, cafestol, which is present in unfiltered brews, raised serum cholesterol as well as ALT, a liver enzyme (Urgert et al., Am J Clin Nutr 1997). It was a small trial, but the mechanism has been consistent across later research.

What the trials found: unfiltered coffee raised cholesterol more

The strongest evidence here comes from randomized controlled trials, the kind of study that can show cause and effect.

A meta-analysis of 12 randomized trials with 1,017 participants found that drinking coffee for an average of 45 days was associated with increases of:

• 8.1 mg/dL in total cholesterol
• 5.4 mg/dL in LDL cholesterol
• 12.6 mg/dL in triglycerides

The increases in total cholesterol were greater in trials using unfiltered coffee (and caffeinated coffee), and the effect rose with the amount consumed (Cai et al., Eur J Clin Nutr 2012). The trials also found that people who already had high blood lipids were more sensitive to the effect.

What population data show by brew method

A large Norwegian study, the Tromsø Study, looked at 21,083 adults aged 40 and older and compared cholesterol levels by how people brewed their coffee (Svatun et al., Open Heart 2022):

This was a cross-sectional study, so it shows associations at one point in time. But it lines up with the trial data: unfiltered methods were linked to bigger cholesterol differences, and filtered coffee showed the smallest.

Filtered coffee and the long view

Cholesterol is one marker. What about long-term outcomes? In the Norwegian Women and Cancer study of about 117,000 women, filtered coffee was associated with lower cardiovascular mortality. The study also noted higher cancer mortality at more than 6 cups a day, which the researchers judged was likely due to confounding by smoking (Lukic et al., Eur J Epidemiol 2020).

Broader research also associates moderate coffee drinking with lower cardiovascular disease risk overall, with the lowest risk around 3–5 cups a day (Ding et al., Circulation 2014). Those studies mostly didn't separate brew methods, so the brew-method data above add useful detail.

Brew method shows up in biological-age research too: in the UK Biobank, filtered coffee was associated with younger biomarker-age scores, while more than 3 cups a day of instant coffee was linked to slightly older scores. See coffee and biological aging.

⚠️ Caution box: pregnancy and high caffeine intake

• Pregnancy. In a dose-response meta-analysis of prospective studies, each additional 100 mg of caffeine a day during pregnancy (around one cup of coffee) was associated with a 13% higher risk of low birth weight (Chen et al., BMC Med 2014). A second meta-analysis linked each additional 100 mg a day with about 7% higher risk of pregnancy loss; the authors called the evidence inconclusive but said avoiding high caffeine intake in pregnancy "appears prudent" (Chen et al., Public Health Nutr 2016). One review goes further and argues for avoiding caffeine in pregnancy, a position that remains debated (James, BMJ Evid Based Med 2021). If you're pregnant or trying to conceive, talk with your clinician about caffeine.
• Very high intake. In a UK Biobank analysis, drinking more than 6 cups a day was associated with 53% higher odds of dementia compared with 1–2 cups a day, along with smaller brain volumes (Pham et al., Nutr Neurosci 2022). More is not automatically better.
• Caffeine affects people differently. If you're sensitive, take medication, or have a health condition, check with your clinician. Want the ritual with much less caffeine? Try All Day Decaf.

Practical brewing guide

You don't have to give up the brew you love. A few ideas, depending on what matters to you:

• If cholesterol is on your radar: Consider a paper-filtered method (pour-over, drip, or a paper-filtered AeroPress-style brewer) for your everyday cups. Filtered coffee had the smallest association with cholesterol in the data above (Svatun et al., 2022; Cai et al., 2012).
• If you love French press: One option is to save it for weekends and use a filter method on weekdays. Six or more cups a day of boiled or plunger coffee showed the clearest association in the Tromsø data (Svatun et al., 2022).
• If espresso is your thing: Keep an eye on how many shots you're having. The espresso association showed up at 3–5 cups a day (Svatun et al., 2022).
• Talk with your clinician if you're managing cholesterol. Your numbers and history matter more than any general rule.

Brewing tips for a cleaner-tasting filtered cup

These are flavor tips, not health claims:

1. Rinse your paper filter with hot water before brewing to cut any papery taste.
2. Grind just before brewing if you can, and match grind size to your method (medium for drip, medium-fine for pour-over).
3. Use good water. Coffee is mostly water, so filtered water often tastes better.
4. Start with good beans. Brew method can't fix stale or defective beans.

Where Edge fits

Whatever brew method you choose, the beans matter. Edge Coffee is specialty-grade, USDA Certified Organic, shade-grown in Peru's highlands, roasted in small batches, and third-party lab tested for mold and mycotoxins. Learn about our testing or see our quality standards.

Ready to brew? Try Pure Health Coffee, our All Day Decaf, or browse the collection.

FAQ

Does French press coffee raise cholesterol? Unfiltered coffee raised cholesterol more than filtered coffee in randomized trials (Cai et al., 2012), and 6+ daily cups of boiled or plunger coffee were associated with higher cholesterol in the Tromsø Study (Svatun et al., 2022).

Is espresso unfiltered? Espresso doesn't use a paper filter, and 3–5 cups a day was associated with higher total cholesterol in the Tromsø Study (Svatun et al., 2022).

What is cafestol? A natural diterpene in coffee that raised serum cholesterol in a randomized trial; it's found in unfiltered brews (Urgert et al., 1997).

Which brew method is best? For cholesterol, filtered coffee had the smallest association in the studies above. For flavor, it's whatever you enjoy most.

General information about coffee research. Not medical advice. These findings describe coffee drinking in general and are not claims about Edge Coffee.

Sources

1. Svatun ÅL et al. Open Heart. 2022. https://pubmed.ncbi.nlm.nih.gov/35537850/ (doi:10.1136/openhrt-2021-001946)
2. Urgert R et al. Am J Clin Nutr. 1997. https://pubmed.ncbi.nlm.nih.gov/9022539/ (doi:10.1093/ajcn/65.2.519)
3. Cai L et al. Eur J Clin Nutr. 2012. https://pubmed.ncbi.nlm.nih.gov/22713771/ (doi:10.1038/ejcn.2012.68)
4. Lukic M et al. Eur J Epidemiol. 2020. https://pubmed.ncbi.nlm.nih.gov/32705499/ (doi:10.1007/s10654-020-00664-x)
5. Ding M et al. Circulation. 2014. https://pubmed.ncbi.nlm.nih.gov/24201300/
6. Chen LW et al. BMC Med. 2014. https://pubmed.ncbi.nlm.nih.gov/25238871/
7. Chen LW et al. Public Health Nutr. 2016. https://pubmed.ncbi.nlm.nih.gov/26329421/
8. James JE. BMJ Evid Based Med. 2021. https://pubmed.ncbi.nlm.nih.gov/32843532/
9. Pham K et al. Nutr Neurosci. 2022. https://pubmed.ncbi.nlm.nih.gov/34165394/