Death Wish Coffee built its entire brand on one promise: the world's strongest coffee. The skull logo, the bold claims, the maximum caffeine positioning — it is all designed to tell you this is not your grandfather's morning cup. And on caffeine, they deliver. Death Wish is genuinely one of the highest-caffeine commercial coffees available.
But there is a second metric that Death Wish never mentions — one that matters far more to your long-term health than caffeine content. And on that metric, Death Wish scores just as poorly as every other commercially roasted coffee on the market.
Death Wish achieves its legendary caffeine content through a combination of bean selection — primarily Robusta beans, which are naturally higher in caffeine than Arabica — and a lighter-than-expected roast profile, since darker roasting burns off caffeine.
The problem: Robusta beans are also naturally higher in quinic acids than Arabica. And a lighter roast profile means less time for even the minimal acid reduction that occurs during standard dark roasting. The result is coffee that delivers maximum caffeine alongside maximum acidity — a combination that is particularly brutal for anyone with acid reflux, GERD, or a sensitive stomach.
Research published by Shibamoto et al. (2009) at UC Davis confirmed that standard commercial roasting processes — regardless of roast level — do not meaningfully reduce quinic acid concentration. Death Wish's roasting process is standard industrial flash roasting. Nothing about it changes the fundamental acidity of the bean.
The relationship between caffeine and acid reflux is well documented. Caffeine relaxes the lower esophageal sphincter — the valve that prevents stomach acid from rising into the esophagus. When that valve is relaxed, acid reflux is more likely to occur regardless of what you eat or drink.
However — and this is critical — reducing caffeine alone has never been shown to resolve acid reflux. The primary driver of coffee-related acid reflux is the acidity of the coffee itself, not the caffeine. Boekema et al. (2004) found that decaf coffee caused nearly identical acid reflux symptoms as regular coffee, confirming that caffeine reduction alone is not the solution. Acid reduction is.
Yes — but not from Death Wish. The only way to achieve genuinely low acid coffee is through a fundamentally different roasting process, not a different bean selection or a marketing label.
Puroast's patented roasting process — confirmed by UC Davis — achieves 5X less acidity than average commercial coffee and 5X more antioxidants. Puroast uses Arabica beans, which are naturally lower in caffeine than Robusta but still deliver a meaningful caffeine content in a full dark roast. You get bold flavor, genuine low acid chemistry, and a healthy dose of caffeine — without the gut punishment.
Puroast Dark Roast delivers the bold, strong flavor you want at 5X less acid than Death Wish and every other standard dark roast. UC Davis confirmed. Patented. No compromises.
Subscribe & Save 15%Sources: Shibamoto et al. (2009). DOI: 10.1021/jf9001687 · Boekema et al. (2004). DOI: 10.1111/j.1365-2036.2004.02295.x · American College of Gastroenterology. gi.org
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Consult your physician regarding acid reflux or gastrointestinal conditions.
