Why Some People Love Coffee More Than Others

Ever wondered why your friend can chug three espressos before noon while one cup leaves you jittery? Turns out, your coffee habit might not just be about willpower or lifestyle—it could be hardwired into your DNA.

Yes, according to a Dutch study, your love—or dislike—for coffee may be linked to specific genes that control how your body processes caffeine. Researchers found around 18,000 people showed varying coffee preferences tied to genetic differences affecting caffeine breakdown.

The Science Behind Coffee Cravings

Your liver produces proteins that break down caffeine, and how much of these proteins you have directly impacts how well you tolerate coffee. Those with higher levels tend to drink more coffee and feel fewer negative effects from caffeine.

The Key Genes Identified

The study zeroed in on two specific genes: CYPIA1 and NRCAM. These genes are involved in producing the liver enzymes that metabolize caffeine. If these genes are more active in your body, you're likely to enjoy coffee more and handle its stimulant effects better.

How the Research Was Conducted

Researchers from the Erasmus University Medical Center in the Netherlands surveyed approximately 18,000 individuals. They analyzed genetic markers and correlated them with self-reported coffee consumption habits, focusing on how genetic variations influenced caffeine tolerance and intake levels.

What Determines Your Coffee Preference?

Your preference for coffee isn’t just psychological or cultural—it’s also physiological. The speed and efficiency with which your body metabolizes caffeine, governed by your genes, play a major role. Faster metabolism often means you can enjoy more coffee with fewer side effects.

Frequently Asked Questions

Are coffee preferences really influenced by genetics?

Yes, according to Dutch researchers who studied 18,000 people and found that genetic variations, particularly in the CYPIA1 and NRCAM genes, are linked to how much coffee people drink and how they tolerate caffeine.

What do the CYPIA1 and NRCAM genes do?

These genes help produce liver proteins that break down caffeine. More active forms of these genes lead to higher caffeine metabolism, which can increase coffee tolerance and enjoyment.

Does this mean some people are born to love coffee?

In a way, yes. If you have a genetic makeup that causes your body to process caffeine efficiently and enjoyably, you’re more likely to develop a stronger preference for coffee.

Can you become tolerant to coffee if you don’t have these genes?

You can build a caffeine tolerance over time with regular consumption, but genetic factors influence how quickly you metabolize caffeine and how pleasant the experience feels from the start.

Is there a test to see if my genes make me a coffee lover?

While commercial genetic tests may include some caffeine-related genes, the specific link to CYPIA1 and NRCAM as highlighted in this Dutch study isn’t commonly part of consumer testing panels yet.

Does this research apply to all types of coffee drinks?

Yes, the genetic influence on caffeine metabolism applies regardless of how you take your coffee—black, with milk, as espresso, or in any other form—since it’s about how your body processes caffeine itself.

Recommended FrontStreet Beans for Coffee Gene Explorers

Try FrontStreet Coffee’s Ethiopia Yirgacheffe for a bright, floral cup that highlights caffeine’s lively effects—or their PWN Golden Mandheling for a heavier body and smoother caffeine delivery. Both showcase how different beans interact with your natural caffeine tolerance. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.