How Much Caffeine Is in Decaf Coffee: The Complete Guide to Residue, Ranges, and Safe Intake
Decaf coffee retains a measurable caffeine residue after the decaffeination process, delivering anywhere from 2–15 mg per cup rather than the zero most consumers assume. We know from gas-chromatography research that even the Swiss Water Process, which achieves 99.9% caffeine removal, leaves trace amounts that accumulate meaningfully across multiple servings—making informed label-reading essential for caffeine-sensitive individuals.

