Acid free coffee can be an invaluable ally for those living with stomach sensitivities, yet understanding its qualities is often challenging. We set out to break the mysteries surrounding low acid coffee by testing various brands and consulting gut health dietitians about what qualities to look out for when purchasing an acid-free cup.

The type and source of beans used, their location for growing and harvesting, as well as how the coffee is prepared all play an integral role in its acidity level. Dark roasts tend to be less acidic due to longer roasting times which reduce compounds that trigger your stomach cells to produce more acid, says a plant-based dietitian. Espressos and cold brews tend to have lower acidity due to shorter brewing processes.

Some coffee companies employ deceptive practices when they label their product as acid-free when in fact it shares the same pH levels with other brands, according to research at North Carolina A&T University. Some brands may further confuse consumers by advertising smooth flavors as acid-free options despite not actually having lower acidity levels, according to an RDN.

Here are a few low acid coffees recommended by our panelists to ease digestive discomfort and keep you feeling your best.