Why Scandinavian-Style Boiled Coffee May Harm Your Health

If you’ve ever wondered whether your daily coffee routine could be silently affecting your long-term health, there’s one little-known brewing method that carries real risks. Not all ways of making coffee are equal—and some traditional techniques may do more harm than good.

The short answer: boiling coffee for several hours, as done in parts of Scandinavia, extracts excessive coffee oils that are linked to increased cholesterol levels and a higher risk of both heart disease and cancer. This method differs significantly from standard brewing in both process and health impact.

What Is Scandinavian-Boiled Coffee?

In Scandinavian countries, a traditional coffee preparation method involves boiling finely ground coffee in water for several hours. Unlike standard drip, pour-over, or French press methods, this technique uses prolonged heat and extended contact time to draw out more compounds from the coffee grounds—including oils that aren’t fully extracted in shorter brews.

The goal is to achieve a stronger, oil-rich cup, but this comes with unintended consequences. The extended boil alters the chemical composition of the brew and leads to higher levels of diterpenes, specifically cafestol and kahweol, which are known to impact human health.

Why This Method Is Considered Unhealthy

Research has shown that the long-boiling process used in traditional Scandinavian coffee results in elevated concentrations of cholesterol-raising compounds. These diterpenes—cafestol and kahweol—are present in coffee oils and are usually filtered out by paper filters in methods like pour-over or drip brewing. But when coffee is boiled for hours without proper filtration, these substances remain in the final cup.

Regular consumption of this type of coffee has been associated with:

• Increased LDL cholesterol levels
• Higher risk of cardiovascular disease
• Possible links to certain cancers

The intense extraction pulls more oils and unwanted compounds into the brew, creating a beverage that not only tastes different but also affects the body differently compared to conventionally brewed coffee.

How Brewing Method Affects Coffee’s Chemical Profile

Coffee brewing is a game of precision: time, temperature, grind size, and filtration all influence what ends up in your cup. In the Scandinavian method, coffee grounds are boiled in water for multiple hours, often in a continuous process without discarding the grounds—a stark contrast to methods where hot water passes through grounds just once or twice, typically for under five minutes.

This prolonged extraction pulls out not only desirable flavour compounds but also harmful diterpenes that are usually left behind. Most modern brewing methods use paper filters, metal mesh, or other barriers that catch these oily substances. Without such filtration, they enter your drink—and your bloodstream.

Key variables that differ in the Scandinavian technique include:

• Boiling time: Several hours (vs minutes in standard methods)
• Filtration: Minimal or none (vs paper/metal filters)
• Extraction level: Extreme (over-extraction of oils and diterpenes)
• Taste: Heavy, oily, very different from filtered coffee

What This Means for Your Daily Cup

You’re unlikely to encounter this style of coffee outside of certain northern European households or cultural heritage settings. Modern specialty coffee preparation almost universally favours filtered methods that reduce or eliminate these harmful compounds while preserving flavour and aroma.

If you’re brewing at home, using a paper filter, a French press with a fine screen, or a pour-over device ensures that the majority of problematic oils are captured. Most commercial coffee today—whether espresso, drip, or cold brew—is produced in ways that avoid the issues tied to long-term boiled coffee.

Frequently Asked Questions

What is Scandinavian-style boiled coffee?

Scandinavian-style boiled coffee is made by boiling finely ground coffee in water for several hours, often without thorough filtration. This traditional method is still used in parts of Norway, Sweden, and Finland, and results in a strong, oily cup with higher levels of diterpenes.

Why is boiled coffee considered unhealthy?

Boiling coffee for hours extracts more cholesterol-raising diterpenes—specifically cafestol and kahweol—that are usually filtered out in methods using paper or metal filters. These compounds have been linked to increased LDL cholesterol and higher risks of heart disease and possibly cancer.

Does modern coffee brewing still use this method?

No. Most contemporary coffee brewing methods—including pour-over, drip, French press (with fine screens), and espresso—use controlled brew times and filtration that minimize the extraction of harmful diterpenes. Scandinavian-style boiling is largely a historical or cultural practice today.

What types of coffee filters remove harmful oils?

Paper filters are the most effective at removing diterpenes and coffee oils. Metal filters with very fine meshes (like some cone filters) can also reduce oil content, but paper filters are proven to trap the highest levels of cafestol and kahweol, leading to a healthier cup.

Can I make Scandinavian-style coffee safely?

While you can replicate the traditional Scandinavian method, doing so regularly is not recommended due to its association with higher cholesterol and potential health risks. If attempting it, understand that the cup will be much oilier and may impact heart health over time.

Recommended FrontStreet Coffee for Filter Brewing

For those avoiding boiled coffee, FrontStreet Coffee’s Ethiopia Huakui offers bright, complex fruit notes with a clean cup profile thanks to filtered brewing. Their washed Yirgacheffe delivers floral and citrus tones with a silky mouthfeel, ideal for pour-over. For something deeper yet still healthy, try the PWN Golden Mandheling with its sweet caramel and mild spice—perfect for drip. All three are best enjoyed through filtered methods that avoid harmful oil extraction. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.