For millions around the world, the day doesn’t truly begin until they’ve had their morning coffee. Whether it’s brewed in a sleek espresso machine or poured from a French press, coffee is an integral part of daily life. But a new study is urging coffee lovers to reconsider how they’re making their cup of joe, warning that certain brewing methods may be contributing to higher levels of LDL cholesterol — often referred to as “bad” cholesterol.
The Surprising Link Between Coffee Machines and Cholesterol
A recent study published in the journal Open Heart suggests that unfiltered coffee — particularly when prepared using certain types of machines or brewing methods — could lead to elevated LDL cholesterol levels. The concern isn’t with coffee itself, but rather with compounds in coffee that are not removed when a filter isn’t used.
These compounds, called diterpenes (notably cafestol and kahweol), are found in the oily part of coffee and have been shown to interfere with the body’s cholesterol regulation. When coffee is brewed without a filter — as is common with French press, espresso, moka pots, and even capsule machines — these compounds remain in the beverage. In contrast, filtered coffee (such as drip-brewed coffee with paper filters) significantly reduces the presence of diterpenes.
What the Research Revealed
The study analyzed data from over 21,000 participants aged between 40 and 69 years, collected through Norway’s Tromsø Study. Researchers compared cholesterol levels with coffee consumption habits and brewing methods. They discovered a clear association: individuals who drank unfiltered coffee had higher levels of LDL cholesterol than those who consumed filtered coffee or none at all.
Interestingly, the link between coffee and cholesterol appeared to differ slightly based on gender. Men who consumed espresso regularly had a more notable increase in LDL levels compared to women. The researchers suggest this could be due to differences in metabolism, hormone levels, or other lifestyle factors.
Espresso and Capsule Machines: Convenient but Risky?
Espresso and capsule-based coffee machines (like Nespresso or Keurig) are beloved for their speed and convenience. However, the study suggests these brewing methods may be contributing to an unintended health issue. Since these machines don’t use paper filters, they allow the cholesterol-raising compounds to pass directly into the cup.
While the amount of cafestol in a single espresso shot may be small, frequent consumption — especially multiple cups a day — could cumulatively raise LDL cholesterol over time.
What’s the Risk of High LDL?
LDL cholesterol is often dubbed the “bad” cholesterol because it can build up in the walls of arteries, leading to plaque formation and narrowing of the arteries (atherosclerosis). This increases the risk of heart disease, heart attacks, and strokes.
Although genetics and diet play a major role in cholesterol levels, lifestyle factors — including how you brew your coffee — could make a significant difference.
What Coffee Lovers Can Do
Before you consider giving up coffee altogether, it’s important to know that not all coffee is created equal. The good news? You don’t have to quit — just be mindful of how it’s brewed.
Here are a few steps you can take:
- Switch to filtered coffee: Using paper filters can significantly reduce the amount of diterpenes in your cup.
- Limit unfiltered coffee: If you love French press or espresso, consider limiting it to one cup a day.
- Get your cholesterol checked regularly: Especially if you’re a heavy coffee drinker or have a family history of heart disease.
- Combine with heart-healthy habits: Maintain a balanced diet, exercise regularly, and avoid trans fats and processed foods.
Final Thoughts
Coffee is a complex beverage — rich in antioxidants and even associated with several health benefits like improved mental alertness and reduced risk of certain chronic diseases. However, this new study is a valuable reminder that how we consume coffee matters just as much as what we consume.
If you’re an avid user of espresso or capsule machines, it might be worth reconsidering your brewing method — -, but to enjoy it in a way that supports your long-term health.
