Is Cold Brew Less Acidic?
Quick Answer: Cold brew is often marketed as “low acid,” but the science is more nuanced: a 2018 study (Rao & Fuller) found cold and hot brew have comparable pH (about 4.85–5.13). However, hot brew extracted more total titratable acids. So cold brew isn’t dramatically less acidic by pH — but it can taste smoother and may have somewhat fewer perceived acids.
“Cold brew is less acidic” is repeated everywhere — but is it actually true? I dug into the published research, and the answer is more interesting (and more honest) than the marketing. If you’re avoiding coffee for stomach reasons, this matters.
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Cold Brew vs Hot Brew: Acidity Compared
What the research shows:
| Measure | Cold brew | Hot brew |
|---|---|---|
| pH (acidity level) | ~4.85–5.13 | Comparable (similar range) |
| Total titratable acids | Lower | Higher |
| Perceived taste | Smoother, less sharp | Brighter, more acidic notes |
| Antioxidant activity | Lower | Higher |
What the Science Actually Found
A 2018 study by Niny Rao and Megan Fuller measured pH across multiple origins (Brazil, Ethiopia, Colombia, Mexico) and found cold and hot brew had comparable pH values, roughly 4.85 to 5.13. In other words, cold brew is not dramatically lower in acidity by the pH measure. The same research found hot brew had higher total titratable acids and higher antioxidant activity.
So Why Does Cold Brew Taste Smoother?
Lower titratable acids and the absence of heat-driven extraction mean cold brew often tastes mellower and less sharp, even when the pH is similar. Taste and measured pH aren’t the same thing — cold brew’s smoothness is real on the palate, just not a giant pH difference.
Should You Drink Cold Brew for a Sensitive Stomach?
Possibly, but don’t treat it as a guaranteed fix. Since pH is comparable to hot coffee, the researchers cautioned against viewing cold brew as a “silver bullet” for acid reflux or stomach issues. If acidity bothers you, also look at low-acid and decaf options and your bean choice. This is general information, not medical advice.
Frequently Asked Questions
Is cold brew really less acidic than hot coffee?
By pH, not dramatically — a 2018 study found cold and hot brew have comparable pH (around 4.85–5.13). However, hot brew had higher total titratable acids, and cold brew often tastes smoother and less sharp.
What is the pH of cold brew coffee?
Research measured cold brew pH at roughly 4.85 to 5.13 across several origins — similar to hot-brewed coffee, not dramatically lower.
Is cold brew better for acid reflux?
It may taste gentler, but since its pH is comparable to hot coffee, researchers caution against treating cold brew as a guaranteed fix for reflux. Consult a doctor for medical concerns.
Does cold brew have fewer antioxidants?
The same 2018 study found hot brew had higher antioxidant activity than cold brew, alongside higher total acids.
Final Thoughts
The honest answer: cold brew isn’t a low-acid miracle by pH, but it often tastes smoother and has fewer titratable acids. Enjoy it for the taste — just don’t expect it to erase coffee’s acidity entirely. Make your own with our cold brew guide.