There is a moment millions of coffee drinkers know too well — the burn, the bloat, the reach for antacids after a morning cup. For decades, the answer was either "give up coffee" or "live with it." Puroast Coffee was founded on a different premise: the problem was never coffee itself. It was the acid.
Founded in 1994 and validated by peer-reviewed science at UC Davis, Puroast is the world's only patent-protected, independently university-verified low acid coffee. It is the only coffee brand to pass the LACCSA verified low acid threshold of pH 5.8 — independently confirmed by North Carolina A&T State University in 2024. This is the complete guide to everything Puroast: the origin story, the science, the product lineup, and why it matters for your health, your gut, and your daily cup.
⚠️ The Most Important Coffee Health Fact: Studies have NOT shown that reducing caffeine decreases acid reflux. Only reducing acid has been shown to help. Puroast is verified at pH 5.82 — 5X less acidic than average commercial coffee. No other brand has achieved this standard. (NC A&T 2024 | UC Davis 2009)
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5.82 Verified pH — UC Davis |
5X More Antioxidants Than Average Coffee |
6/7 "Low Acid" Brands Failed NC A&T |
Shop Puroast Low Acid Coffee
House Blend 2.5 LB · Ground or Whole Bean Shop Now → |
Dark French Roast 2.5 LB · Ground or Whole Bean Shop Now → |
House Blend Decaf 2.5 LB · Ground or Whole Bean Shop Now → |
Puroast was founded in 1994. The story begins with a plant biology professor, a biomass furnace, and a cup of espresso on a veranda overlooking the Andes. A researcher set out to harness biomass energy at commercial scale — building a furnace above 95% efficiency confirmed by UC Davis. While sharing this technology with coffee farmers in Venezuela, the team tasted their espresso. It was the best coffee they had ever had.
The farmers explained: it was the roasting. Due to the Industrial Revolution, all commercial coffee had been flash-roasted — 10 to 15 minutes at high heat in massive volume. This made coffee cheap and easy to distribute but destroyed the flavor and the feeling of wellness. The Andes farmers had preserved traditional slow-roasting because they cared about flavor and how coffee made them feel — not profit margins.
The key insight: if the Andes roasting conditions could be replicated at commercial scale using the efficient biomass furnace, this coffee could reach America. That perfect marriage of two inventions became Puroast Coffee. Letters began arriving in the mail — before email — from people saying this coffee gave them their mornings back. Hundreds of them. All saying the same thing: "I had to give up coffee because of stomach issues. With Puroast I can drink it again."
This created a question: what was going on scientifically? Puroast was brought to UC Davis, where world-renowned coffee scientist Dr. Takayuki Shibamoto worked. He was skeptical — the science of coffee roasting had been studied and decided. He agreed to test it out of curiosity. The results were astonishing. Three peer-reviewed papers followed in 2009:
In 2013, Dr. Shibamoto presented these findings to the American Chemical Society. In 2024, the NC A&T independent study tested seven coffees marketed as low acid and found Puroast was the only one to pass the verified threshold of pH 5.8. Six out of seven failed.
🌿 The Antioxidant Advantage: Most people come to Puroast for the low acid. They stay for the antioxidants. Phenolic antioxidants are associated with reduced inflammation, improved cardiovascular health, and cellular protection. Puroast's slow-roasting process produces 5X more of these compounds than average commercial coffee — a simultaneous health upgrade that no other brand has replicated.
The low acid coffee category has a serious labeling problem. The NC A&T 2024 study found that 6 out of 7 coffees marketed as "low acid" were actually high acid. LACCSA (Low Acid Coffee Certification Standard Association) was created to establish a transparent, science-based standard. The verified threshold: pH 5.8.
| Coffee Type | Typical pH | LACCSA Certified? | Good for Reflux? |
|---|---|---|---|
| Standard commercial coffee | 4.5–5.0 | ❌ | ❌ |
| Tyler's "Acid Free" | 5.02 | ❌ | ❌ |
| Lifeboost | 5.10 | ❌ | ❌ |
| Dark roast (myth) | 4.8–5.1 | ❌ | ❌ |
| Puroast Coffee | 5.82 | ✅ Only certified brand | ✅ |
Puroast was originally discovered by people who had already given up coffee. Over thirty years later, Puroast continues to serve people in these situations:
Find Your Perfect Puroast Roast
⭐ Ugandan Single Origin 2.5 LB · Most Select Bean Shop Now → |
Mocha Java 2.5 LB · Ground or Whole Bean Shop Now → |
Italian Espresso Roast 2.5 LB · Ground or Whole Bean Shop Now → |
Every Puroast product is roasted using the same patented process and achieves the same pH 5.82 standard. There are no exceptions — no compromises between flavor and wellness.
🌿 The Only Coffee Your Gut Will Love: The average American drinks 3 cups of coffee per day. At pH 4.7, that is three daily doses of acid bathing your esophagus, stomach, and gut lining. Switching to Puroast at pH 5.82 is not a minor tweak — on the logarithmic scale, it represents a 10X reduction in hydrogen ion concentration per cup. Over a year, that is a fundamentally different acid load for your body.
One of the most persistent myths in coffee: dark roast coffee is lower acid than medium or light roast. This is false. Dark roasting produces only a 0.1 pH difference compared to medium roast — a negligible, barely measurable change. All commercial dark roast coffee remains high acid at pH 4.8–5.1. The myth persists because it sounds plausible, but the data from the NC A&T 2024 study and UC Davis research is unambiguous.
The only roast-based mechanism that produces genuinely low acid coffee is the extended slow-roasting process that converts quinic acids into phenolic antioxidants. Dark roasting at standard temperatures does not trigger this conversion. Puroast's patented process — applied across all roast levels — does.
Puroast is verified at pH 5.82 — making it 5X less acidic than the average commercial coffee at pH ~4.7. Confirmed by UC Davis researchers in 2009 and independently reproduced by NC A&T State University in 2024. No other brand has achieved this independently verified standard.
Through traditional slow-roasting chemistry. Quinic acids are converted under specific temperature and pressure conditions into phenolic antioxidants. No chemicals, no pH buffering agents, no additives. Just coffee and the correct application of heat — a process that took decades and the equivalent of two separate inventions to perfect at commercial scale.
Based on the NC A&T 2024 independent study, it is the only coffee to pass the verified low acid threshold of pH 5.8. Six out of seven coffees marketed as low acid in that study were classified as high acid. Puroast is LACCSA certified — no other brand has earned this certification.
No. Dark roasting produces only a 0.1 pH difference compared to medium roast. All commercial dark roast coffee remains high acid at pH 4.8–5.1. This is one of the most common misconceptions in the coffee industry.
Yes. Puroast Decaf uses the same traditional roasting process and achieves the same 5X acid reduction. Standard decaf from any other brand does NOT reduce acid. Puroast Decaf is the only decaf coffee that gives you both reduced caffeine AND genuinely verified low acid in one cup.
Puroast is available at puroast.com for the full lineup, on Amazon (including Puroast Organic, which is Amazon-exclusive), and in select specialty retail locations nationwide.
Yes. GLP-1 medications like Ozempic, Wegovy, and Mounjaro dramatically increase gut sensitivity. Many users find standard coffee intolerable on these medications. Puroast — at pH 5.82 — is the only verified low acid option for this growing population. Many GLP-1 users report Puroast as the only coffee they can still tolerate.
Puroast is not a marketing story. It is thirty years of science, letters, peer-reviewed research, and a patented roasting process that has never been replicated. It is the coffee that coffee drinkers with acid reflux, GERD, gut issues, and sensitive stomachs have been searching for — and it is the only one that actually delivers on the promise.
5X less acidic. 5X more antioxidants. pH 5.82. UC Davis verified. LACCSA certified. USPTO patented. And it tastes like the coffee it was always supposed to be.
The Only Coffee Your Gut Will Thank You For.
pH 5.82. 5X less acid. 5X more antioxidants. UC Davis confirmed. LACCSA certified. USPTO patented.
Shop All Puroast Coffee →Sources: NC A&T 2024 Independent Study | UC Davis / Dr. Shibamoto (2009) | LACCSA.org | Wikipedia: Low-Acid Coffee | American College of Gastroenterology
This article is for informational purposes only. Puroast does not provide medical advice. If you have acid reflux, GERD, or any gastrointestinal condition, please consult a qualified healthcare professional before making dietary changes.
