If you love coffee but dread the heartburn, you're not alone. Roughly 20% of Americans deal with acid reflux regularly, and coffee is one of the most common triggers. But here's what most people don't realize: it's not the caffeine causing the problem. It's the acid — and the way your coffee is brewed makes an enormous difference.
Cold brew coffee is up to 67% less acidic than traditional hot-brewed coffee. That single fact has made it the go-to option for coffee drinkers with GERD, acid reflux, and sensitive stomachs. But not all cold brew is created equal. The number of ingredients, the type of beans, and what gets added after brewing all affect how your stomach responds.
This guide breaks down exactly why cold brew is easier on your digestive system, what to look for when choosing a brand, and how to enjoy strong coffee without the burn.
Why Regular Coffee Causes Acid Reflux
Hot-brewed coffee extracts more chlorogenic acids and other organic compounds from the beans during the brewing process. These acids — while perfectly natural — can irritate the stomach lining and relax the lower esophageal sphincter (LES), the muscle that keeps stomach acid from traveling back up into your throat.
When the LES relaxes at the wrong time, stomach acid rises into the esophagus. That's acid reflux. And if it happens frequently, it becomes gastroesophageal reflux disease (GERD).
The pH of traditional drip coffee typically falls between 4.85 and 5.10. Espresso can be even more acidic. For someone with a sensitive stomach or a history of reflux, that level of acidity — combined with compounds that promote gastric acid secretion — is a recipe for discomfort.
Why Cold Brew Is Easier on Your Stomach
The 67% Less Acidic Advantage
Cold brew is made by steeping coarsely ground coffee in cold or room-temperature water for 12 to 24 hours. Because heat is the primary driver of acid extraction, cold brewing produces a concentrate that's significantly less acidic than any hot-brewed method.
Research published in Scientific Reports (2018) found that cold brew extracts fewer of the compounds responsible for stomach irritation. The result is a smoother, naturally less acidic cup of coffee — without requiring chemical acid neutralizers or "low-acid" processing that strips flavor along with acidity.
Bare Brew's cold brew is 67% less acidic than traditional hot-brewed coffee. That's not a marketing claim — it's a function of the cold-steeping process and single-origin Honduran Arabica beans selected specifically for their flavor and acidity profile.
Fewer Irritating Compounds
Beyond pH, cold brewing extracts fewer of the compounds that stimulate gastric acid production. Two of the main culprits in hot coffee — N-methylpyridinium (NMP) and catechols — are present in lower concentrations in cold brew. This means your stomach produces less acid in response to cold brew than it does to the same amount of hot-brewed coffee.
For anyone dealing with gastritis, IBS, or general stomach sensitivity, this double reduction — less acid going in, less acid being produced — makes cold brew a fundamentally different experience.
What to Look for in a Cold Brew for Acid Reflux
Not every cold brew on the shelf is going to be gentle on your stomach. The ingredients list is where the real story lives. Here's what to prioritize:
Ingredient Count Matters
The simplest cold brew is the best cold brew — especially for sensitive stomachs. Every additional ingredient is another potential trigger. Citric acid (used as a preservative in many ready-to-drink coffees), natural flavors, gums, and stabilizers can all contribute to GI distress.
Bare Brew uses exactly 2 ingredients: Honduran Arabica coffee and filtered water. Nothing else. No citric acid, no potassium sorbate, no "natural flavors" of unknown origin. When you're trying to minimize stomach irritation, fewer ingredients means fewer variables.
Zero Sugar, Zero Additives
Sugar and artificial sweeteners are both associated with increased acid reflux symptoms. Sugar can slow gastric emptying (keeping food and acid in your stomach longer), while sugar alcohols like erythritol and sorbitol are known to cause bloating and GI upset in sensitive individuals.
Look for cold brew with 0g sugar and 0g carbs — not "low sugar" or "lightly sweetened." The healthiest canned coffee options keep the ingredient list clean and the sugar count at absolute zero.
Arabica vs. Robusta
Coffee beans come in two main varieties: Arabica and Robusta. Robusta beans contain roughly twice the chlorogenic acid content of Arabica beans and significantly more caffeine per bean. Both factors contribute to more stomach irritation.
Arabica beans are naturally smoother, less acidic, and better-tasting. Most premium cold brew brands use Arabica, but not all of them disclose this on the label. If the can doesn't specify 100% Arabica, assume it's a blend that may include Robusta.
Can You Still Get Strong Caffeine Without the Burn?
One of the biggest misconceptions about low-acid coffee is that it has to be weak. That's simply not true. Acidity and caffeine content are different things entirely.
Cold brew caffeine content varies widely by brand. Some contain as little as 100mg per serving. Others, like Bare Brew, pack 320mg of natural caffeine into a single 12oz can — more than most energy drinks — while maintaining that 67% less acidic profile.
How? Because caffeine extraction depends on steeping time, bean-to-water ratio, and grind size — not on temperature or acid extraction. A cold brew can be both low-acid and high-caffeine. You don't have to choose.
For context, here's how 320mg compares:
- Standard drip coffee (12oz): ~120–150mg
- Espresso shot: ~63mg
- Red Bull (12oz): ~111mg
- Monster Energy (16oz): ~160mg
- Bare Brew Cold Brew (12oz): 320mg
That's more energy from a cleaner source — with a fraction of the acidity.
Other Tips for Drinking Coffee With Acid Reflux
Switching to cold brew is the most impactful change you can make, but there are a few other strategies that help:
Don't drink on an empty stomach. Coffee — even low-acid cold brew — stimulates gastric acid production. Having food in your stomach first provides a buffer.
Avoid lying down after drinking. Stay upright for at least 30 minutes after your coffee. Gravity helps keep stomach contents where they belong.
Skip the cream and sugar. Dairy can trigger reflux in some people, and sugar slows digestion. If you need to add something, a small amount of oat milk is generally well-tolerated.
Watch your timing. Drinking coffee too close to bedtime can worsen nighttime reflux. Stick to morning and early afternoon consumption.
Stay hydrated. Water dilutes stomach acid and helps move food through your digestive system. Pair your cold brew with water throughout the day.
For a deeper dive into the science behind cold brew's health benefits, including its impact on gut bacteria and inflammation, check out our research-backed guide.
Frequently Asked Questions
Is cold brew coffee safe for people with GERD?
Cold brew is generally a better option than hot-brewed coffee for people with GERD. Its lower acidity (up to 67% less acidic) means less irritation to the esophageal lining and less stimulation of gastric acid production. However, everyone's triggers are different. If you've been avoiding coffee entirely due to GERD, start with a small serving and see how your body responds. Consulting with your gastroenterologist is always recommended for personalized advice.
Does cold brew have less acid than regular coffee?
Yes. Cold brew is significantly less acidic than hot-brewed coffee. The cold steeping process extracts fewer chlorogenic acids and other organic compounds that contribute to coffee's acidity. Research published in Scientific Reports confirms that cold brew has a higher pH (less acidic) than hot brew made from the same beans. Bare Brew's cold brew is 67% less acidic than traditional hot-brewed coffee.
What is the least acidic way to drink coffee?
Cold brew is the least acidic brewing method widely available. Among cold brews, look for single-origin 100% Arabica beans (lower acid than Robusta), no added citric acid or preservatives, and no sugar or artificial sweeteners. A clean, two-ingredient cold brew — coffee and water — is the gentlest option.
Can caffeine make acid reflux worse?
Caffeine can relax the lower esophageal sphincter in some people, which may contribute to reflux. However, research suggests that other compounds in coffee (particularly chlorogenic acids) play a larger role in triggering symptoms than caffeine alone. Switching to cold brew reduces those compounds significantly while still delivering caffeine. If you're caffeine-sensitive, start with a smaller serving.
Is Bare Brew good for sensitive stomachs?
Bare Brew is made with only 2 ingredients — Honduran Arabica coffee and filtered water — with 0g sugar, 0g carbs, and no additives. It's 67% less acidic than hot-brewed coffee. The minimal ingredient list and low acidity make it one of the most stomach-friendly canned coffee options available. Many customers with acid reflux and IBS specifically choose Bare Brew for this reason.
The Bottom Line
You don't have to give up coffee because of acid reflux. Cold brew's naturally lower acidity — especially when it's made with 100% Arabica beans and nothing else — makes it a viable option for people who've been told to quit coffee entirely.
The key is choosing a clean cold brew with minimal ingredients, zero sugar, and no acidic preservatives. Your stomach can tell the difference between 2 ingredients and 20.
Ready to try coffee your stomach can actually handle? Shop Bare Brew — 2 ingredients, 67% less acidic, 320mg of clean caffeine.
