What Is Cafestol? The Cholesterol-Raising Compound in Unfiltered Coffee

If you’ve ever wondered why your doctor might advise against drinking certain types of coffee—or why some brew methods seem linked to higher cholesterol—it likely comes down to one tiny but powerful compound: cafestol. Found mostly in unfiltered brews, this natural substance can significantly impact your blood lipid levels. But what exactly is it, and why does your brewing method matter so much?

Cafestol is a diterpene compound found in coffee. It’s present in high amounts—6 to 12 milligrams per cup—in unfiltered coffee such as Turkish, French press, and Scandinavian boiled coffee, but nearly absent—0.2 to 0.6 milligrams per cup—in filtered coffee and instant. That difference explains its effect on serum cholesterol.

What Is Cafestol?

Cafestol is a diterpene, a type of organic compound that is lipid-soluble. It is one of two such compounds in coffee—the other being kahweol. These substances are found in the oily fraction of coffee beans and are not water-soluble in a way that allows them to pass easily through paper filters. You can think of them as oily compounds that dissolve in hot water but stick around when that water is filtered.

Cafestol and kahweol are structurally very similar. The only chemical difference is that kahweol has one extra double bond. Both are extracted by hot water during brewing but are largely retained by paper filters, which is why your choice of brew method changes how much ends up in your cup.

Where Does Cafestol Come From?

Cafestol and kahweol are found almost exclusively in coffee beans. They are present in both Arabica and Robusta, but in very different amounts. Arabica beans contain both cafestol and kahweol, and together these compounds can make up about 1% of the bean’s total mass. In contrast, Robusta beans have roughly half the amount of cafestol and almost no kahweol at all.

The concentration of these compounds also varies by bean variety and growing conditions, though the Arabica vs. Robusta difference is the most consistent and significant. That means your choice of coffee species alone impacts how much cafestol you’re likely to consume.

How Does Cafestol Affect Your Health?

In the 1980s, researchers discovered that drinking unfiltered coffee could raise serum cholesterol levels. Further studies identified cafestol and kahweol as the primary agents behind this effect. Of the two, cafestol is more potent: daily intake of around 60 milligrams of cafestol can significantly increase cholesterol. A mixture of cafestol (60 mg/day) and kahweol (51 mg/day) raises cholesterol only slightly more than cafestol alone (64 mg/day).

Kahweol is harder to isolate in pure form, and its effects on cholesterol remain less clearly defined due to its instability and purification challenges. Still, the bulk of the cholesterol-raising effect comes from cafestol, especially in unfiltered brews where its levels are highest.

Which Coffee Brewing Methods Contain the Most Cafestol?

The way you brew your coffee determines how much cafestol ends up in your cup. Brewing methods without paper filters—such as Turkish coffee, French press (plunger pot), and Scandinavian-style boiled coffee—allow cafestol to remain in the final drink. These methods typically deliver 6 to 12 milligrams of cafestol per cup.

In contrast, filtered coffee—whether drip, pour-over, or drip machines with paper filters—removes most of the cafestol, leaving only about 0.2 to 0.6 milligrams per cup. Even espresso, which is made under pressure and has relatively high concentrations (around 4 milligrams per cup), contributes less cafestol overall simply because most people drink smaller servings. That makes espresso a minor source compared to unfiltered methods.

So if you’re drinking multiple cups of French press or Turkish coffee daily, you’re consuming significantly more cafestol than someone who drinks filtered drip coffee or espresso.

Frequently Asked Questions

What is cafestol in coffee?

Cafestol is a natural diterpene compound found in coffee beans. It is lipid-soluble and not removed by hot water alone, but it is mostly filtered out by paper filters. It is found in higher amounts in unfiltered coffee.

Does filtered coffee contain cafestol?

Yes, but in very small amounts—typically 0.2 to 0.6 milligrams per cup. Paper filters trap most of the cafestol during brewing, so filtered coffee has far less than unfiltered methods.

Why does Turkish coffee have more cafestol?

Turkish coffee is unfiltered and boiled, which means the cafestol is not removed by any filtering process. As a result, it retains 6 to 12 milligrams of cafestol per cup, one of the highest levels among brew methods.

Is cafestol bad for your health?

Cafestol can raise serum cholesterol levels if consumed in large amounts, particularly in unfiltered coffee. Moderate consumption of filtered coffee presents minimal risk in this regard.

Does espresso have cafestol?

Yes, espresso contains about 4 milligrams of cafestol per cup, but because it is consumed in smaller servings, it is a minor source of cafestol compared to unfiltered coffee styles.

Which brewing method has the least cafestol?

Paper-filtered coffee methods—like pour-over, drip, and automatic drip machines—have the least cafestol, usually between 0.2 and 0.6 milligrams per cup, because the filter traps the compound.

Recommended FrontStreet Beans for Brewing Experiments

Try FrontStreet Coffee’s Lintong Mandheling and PWN Golden Mandheling for a rich, full-bodied experience that highlights how brew method affects flavour—and compounds like cafestol. Lintong Mandheling offers herbal, woody notes with spice, black chocolate, and caramel, while PWN Golden Mandheling delivers toast, pine, caramel, and cocoa with a thick, balanced body. Both are excellent for testing unfiltered methods like French press. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.