From a tiny ristretto at a Naples espresso bar to a 32-ounce blended caramel frappuccino. From a precise Japanese-style pour over to a Vietnamese ca phe trung swirled with egg foam. The world of coffee drinks is extraordinarily varied. But every single one of them shares one underlying truth: the fundamental acidity of any coffee drink is determined by the roasting chemistry of the base bean — not by the brewing method, the additions, or the serving style. Studies have NOT shown that reducing caffeine directly decreases acid reflux symptoms. Reducing acid is the only lever that works — and that starts with the roast.
1–2oz extracted under 9 bars of pressure in 25–30 seconds. Intensely concentrated. The foundation of most cafe drinks. Standard commercial espresso: pH 4.7–5.0. Puroast Italian Espresso Roast: pH 5.82. Every espresso-based drink made with Puroast starts from a low acid foundation.
A shorter, more concentrated pull — 1:1 ratio (18g in, 18g out). Sweeter and more syrupy than a normale. Slightly lower acid per serving due to smaller volume. Still high acid from commercial beans. Puroast Italian Espresso Roast makes the finest low acid ristretto available.
Espresso + hot water. Typically 2oz espresso diluted with 4–6oz hot water. Produces a coffee similar in volume and strength to drip coffee but with espresso's crema and flavor complexity. Dilution slightly reduces acid concentration per sip. Best with Puroast Italian Espresso Roast.
2oz espresso + 6–8oz steamed milk + thin microfoam layer. The most popular espresso-based drink globally. Milk at pH 6.5–6.8 buffers some coffee acid. Starting with Puroast at pH 5.82 + whole milk produces one of the most stomach-friendly coffee drinks available.
Equal parts espresso, steamed milk, and thick microfoam — typically 2oz each. More espresso-forward than a latte. Traditional Italian cappuccino uses significantly less milk than an American version.
Originated in Australia and New Zealand. Double ristretto shots with approximately 4oz of steamed microfoam milk. Higher coffee-to-milk ratio than a latte, smaller volume. The ristretto base gives it a sweeter, more concentrated character.
Equal parts espresso and steamed milk — typically 2oz each. Spanish origin. Less milk than a latte. Cuts the intensity without diluting the espresso character.
Espresso marked with a small amount of milk. Traditional Italian macchiato: 1–2 shots + 1 tablespoon steamed milk. Starbucks macchiatos bear no resemblance to the Italian original — they are effectively flavored lattes built upside down.
The most consumed coffee drink in America. Hot water drips through ground coffee in a paper filter. Clean, medium-bodied cup. Standard commercial drip coffee: pH 4.7–5.0. Puroast drip coffee: pH 5.82. The easiest upgrade you can make to your daily routine.
Manual filter coffee — hot water poured deliberately over grounds in a dripper. Exceptional clarity and flavor complexity. Devices: Hario V60, Chemex, Kalita Wave. The clarity of pour over amplifies both the complexity and the acidity of your beans. Puroast at pH 5.82 makes pour over both clearer and smoother.
Hybrid between immersion and pressure brewing. Coffee steeps 1–2 minutes then pressed through a paper filter. Concentrated, espresso-adjacent. Highly forgiving and excellent for travel. Puroast Aeropress at pH 5.82 is one of the smoothest single-cup brewing experiences available.
Italian stovetop espresso maker. Steam pressure forces water through grounds into the top chamber. Concentrated, espresso-like coffee. Traditional Cuban home brewing vessel — ideal for cafe cubano with Puroast Italian Espresso Roast.
Coffee steeped in cold water for 12–24 hours. Smoother, naturally slightly lower-acid than hot brew from the same beans. Cold brew from standard commercial beans: pH 5.0–5.3 — still more acidic than Puroast. Puroast cold brew: pH 5.82. The roasting determines the floor.
Hot coffee served over ice. Flash brew method (double strength over ice) produces best results. Locks in aromatic compounds. Less smooth than cold brew but faster and brighter. Puroast House Blend flash brew: exceptional.
Cold brew infused with nitrogen and served on draft. Cascading, creamy effect similar to Guinness stout. Natural sweet perception without added sugar. Slightly lower perceived acid due to nitrogen interaction.
Espresso over ice, topped with cold milk. Different flavor integration than a hot latte. Starbucks iced lattes: pH 4.6–4.8 base. Puroast iced latte: dramatically lower acid in the same format.
Cuban espresso sweetened with demerara espumita (sugar foam). One of the world's most iconic coffee preparations. Puroast Italian Espresso Roast makes exceptional low acid cafe cubano at pH 5.82.
Phin-brewed concentrated coffee over ice with sweetened condensed milk. Bold, sweet, culturally distinctive. Use Puroast Dark French Roast in the phin for low acid ca phe sua da.
Very finely ground coffee boiled directly in a small pot (cezve) with sugar. Unfiltered. Intensely strong and full-bodied. Higher acid due to unfiltered preparation and fine grind extraction.
| Drink | Standard Beans pH | Puroast pH | Notes |
|---|---|---|---|
| Espresso (2oz) | 4.7–5.0 | 5.82 | Concentrated per oz |
| Drip coffee (12oz) | 4.7–5.0 | 5.82 | High total volume |
| Latte (12oz) | 4.8 (milk buffers) | 5.82+ | Milk reduces acid moderately |
| Cold brew (12oz) | 5.0–5.3 | 5.82+ | Lower than hot brew |
| Iced coffee (12oz) | 4.7–5.0 | 5.82 | Same as drip |
| Nitro cold brew (12oz) | 5.1–5.4 | 5.82+ | Lowest standard option |
Cold brew is marginally lower in acid than drip or espresso from the same beans (pH 5.0–5.3 vs 4.7–5.0). But no standard preparation method achieves Puroast's pH 5.82 — lower acid than any brewing method applied to conventional coffee.
Milk at pH 6.5–6.8 temporarily buffers coffee acid. The effect is partial. Starting with a low acid base coffee is the only reliable way to consistently reduce acid intake.
Not per serving — despite its concentrated flavor, espresso extracts fewer chlorogenic acids than drip due to shorter extraction time. Both sit at pH 4.7–5.0 from conventional coffee. Per ounce concentration is higher in espresso but per serving is comparable.
A flat white or latte made with Puroast and whole milk. The combination of pH 5.82 base coffee with alkaline milk produces a drink genuinely comfortable for most acid reflux and GERD sufferers.
No. Decaffeination does not remove acid. Decaf coffee has approximately the same pH (~5.0) as regular coffee. Only Puroast achieves genuinely low acid at pH 5.82 through slow-roasting chemistry.
Puroast House Blend — the smoothest low acid everyday coffee at pH 5.82. Subscribe and save 15%.
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