Understanding Coffee Acidity
One of our coffee regulars recently shared a coffee problem that got us curious. She enjoys a single espresso every morning and had tried several of our coffees—from blends to single origins. But here’s the twist: most of them triggered acid reflux. Except one: Mighty Warrior.
Her question was simple but insightful: Why does this one feel gentler on my stomach? Why are some coffees more acidic than others?
We had a few theories (like how blends are often less acidic, since it is a mixed of different coffee beans or how different growing regions impact acidity), but we wanted answers grounded in science. That led us to an interesting review paper (2023) titled:
“Acids in Coffee: A Review of Sensory Measurements and Meta-Analysis of Chemical Composition“
Below are the key takeaways.
Understanding Coffee Acidity
1.Two Main Acid Types:
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- Organic Acids (OAs): Includes citric, malic, quinic, and acetic acids. These contribute to brightness and tanginess in flavor.
- Chlorogenic Acids (CGAs): Antioxidants that break down during roasting, affecting both flavor and perceived acidity.
2. Roasting Changes Everything:
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- Arabica beans tend to lose acidity during roasting, especially at medium to dark levels.
- Robusta beans show the opposite: they gain more acidity (notably acetic acid) with deeper roasting.
3. Processing Matters:
Fermentation methods (like anaerobic or yeast processing) can lead to higher citric or acetic acid content, depending on microbial activity during coffee processing.
4. Acetic Acid = Not Always a Friend:
High levels of acetic acid can create harsh or vinegary flavors, and it’s more commonly found in over-fermented coffee beans or darker roasted robusta beans.
5. Sensory Perception is Subjective:
Acidity isn’t always visible on a label. What tastes bright and juicy to one person might feel flavourful or harsh to another.
What Should You Do If Coffee Upsets Your Stomach?
Don’t give up on coffee just yet. Here are some gut-friendly tips to help you find the right cup:
1.Choose Medium to Dark Roast Arabicas:
They generally have lower acidity and are easier on sensitive stomachs.
2.Stick to Washed or Semi-Washed Coffees:
If you’re opting for a Single Origin coffee, go for beans processed using washed or semi-washed methods—they usually have lower acidity compared to those processed through fermentation.
3.Consider Balanced Blends (like Mighty Warrior):
Coffee blends are often designed for smoothness and roundness—great if you’re looking for a mellow cup. You might want to try our blends like Mighty Warrior (medium roast) or Coffee Le Noir (dark roast)—the go-to choices our coffee drinker with a sensitive gut settled on for her daily cup.
4.Skip High-Elevation, High-Acid Coffees:
Regions like Ethiopia and Kenya are known for vibrant acidity, which may be too intense for some.
5.Mind Your Brew Method:
Espresso concentrates acidity. Opt for pour-over, AeroPress, or cold brew for a softer, smoother experience.
Final Thoughts
At Mighty Wonders Coffee, we are passionate about more than just taste—we care about how coffee makes you feel. If you have a sensitive gut, you’re not alone, and the good news is: there’s a cup out there for you.
We are always happy to help guide you to the right coffee that fits both your taste and your tummy. Because great coffee should not come with a side of discomfort.
Disclaimer: The information in this blog is based on personal experiences and publicly available research. It is intended for educational and informational purposes only and should not be considered medical advice. Everyone’s body responds differently to coffee. If you have ongoing digestive issues or health concerns, please consult with a qualified healthcare professional.
