What Is Low Acid Coffee?

Low acid coffee is coffee that is low in Chlorogenic acid and other organic compounds like quinic and citric acids. For a deep dive, see my post, "Linking Low Acid Coffee and Chlorogenic Acid."

Unfortunately, regular coffee contains high levels of these organic acids. As a result, many drinkers experience gastrointestinal issues such as stomach aches, heartburn, acid reflux, and Irritable Bowel Syndrome (IBS).

Where Coffee's Acidity Begins

A coffee bean is the seed of a coffee cherry, and the coffee plant is among the most acidic in the plant kingdom. The type of bean and where it's grown are the first factors that determine its acidity.

Coffee Types and Varietals

The two most popular types of coffee are Robusta and Arabica.

• Robusta: Contains higher levels of caffeine and Chlorogenic Acid (CGA), which leads to a more acidic, bitter cup with less sweetness.
• Arabica: Has less CGA and more natural sugars (sucrose), resulting in a sweeter, better-tasting cup with a more moderate level of acidity.

The Roasting Makes the Difference

While origin and varietal play a role, roasting has the largest impact on a coffee's acidity profile. The roaster's job is to take the raw green beans, with their nearly 1,000 flavor compounds, and develop them through the careful application of heat over time.

During roasting, a series of chemical reactions breaks down the bean's compounds, including the Chlorogenic acids. The key factors are temperature and duration. Most modern, fast-roasting profiles never achieve the temperature or maintain the duration needed to significantly reduce these acids. This is why slow-roasted coffee is naturally low in acid.

How to Choose a True Low-Acid Coffee

Many brands claim to be "low acid," but there are no universal standards. Here’s how to know for sure:

1. Look for Transparency. Roasters should provide verification for their claims. Be wary of marketing noise without proof.
2. Check the pH Score. The pH level is a simple, scientific way to measure acidity. A true low-acid coffee should have a pH score of 5.5 or higher. The higher the score, the less acidic the coffee.
3. Verify with Third-Party Lab Results. The best way to trust a pH score is to see an independent lab analysis.

Frequently Asked Questions (FAQ)

What coffee is least acidic?

Mavericks Dark French Blend is one of the least acidic coffees available, with a verified pH score of 6.39. It's an excellent choice for those with acid reflux.

What kind of coffee is easiest on your stomach?

Slow-roasted coffees are easiest on the stomach because the extended roasting time naturally breaks down the harsh acids. This produces a smooth, pleasant cup that is gentle on both your stomach and your palate.

Can the brewing method affect acidity?

Yes, brewing methods like cold brew can moderately reduce acidity. However, it is not a substitute for starting with a truly low-acid bean from a slow-roasting process.

Is organic coffee less acidic?

No. Being certified organic does not mean a coffee is less acidic. All coffee beans, regardless of farming practices, are naturally high in acid before roasting.

What's the best coffee for acid reflux?

The best coffee for acid reflux is a slow-roasted coffee with a minimum pH score of 5.5, ideally closer to 6.0 or higher. You may also want to consider a water-processed decaf, as caffeine can also be an irritant.

Hope you find this article helpful and practical in your search.

-Ryan