What pH did Trader Joe's Low Acid Dark French Roast test at?

pH 5.44 — below the 5.5 clinical threshold established by LACCSA. Classified as High Acid.

What pH is Puroast verified at?

Approximately pH 5.82 by UC Davis (2008) and pH 5.22 at brew strength by NC A&T University (2024).

How much caffeine does Trader Joe's Low Acid coffee have?

Independent testing found approximately 51% of the caffeine of Trader Joe's own regular coffee — a greater than 49% reduction, consistent with a half-caff blend.

Does Puroast remove caffeine to achieve low acidity?

No. Puroast uses traditional slow-roasting to transform chlorogenic acids into antioxidants. Caffeine is completely preserved.

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The Science That Exposed Trader Joe's Low-Acid Coffee Claims

The Science That Exposed Trader Joe's Low-Acid Coffee Claims

The Science That Exposed Trader Joe's Low-Acid Coffee Claims — pH, Caffeine, and the Chemistry That Cannot Lie

Science does not care about branding. When independent scientists tested Trader Joe's Low Acid Dark French Roast, the results were unambiguous — and devastating. pH 5.44. Greater than 50% caffeine reduction. Three federal lawsuits.

Puroast does not provide medical advice. Always consult a qualified health professional.