How much caffeine in decaf coffee is really left? Typical mg per cup for filter, espresso and instant decaf, the rules behind the numbers and what changes them.
CO2 decaffeination uses supercritical carbon dioxide to remove caffeine with no solvents. How the technology works, what it does to taste, cost drivers and who uses it.
Sugarcane decaf uses ethyl acetate from fermented molasses to remove caffeine while keeping sweetness. Step-by-step process, safety, flavour and buying tips for 2026.
The Swiss Water process removes 99.9% of caffeine using only water, green coffee extract and carbon filters. Learn each stage, flavour impact, cost and buyer tips.
How is coffee decaffeinated? A clear explanation of the four main methods: methylene chloride, ethyl acetate, Swiss Water and CO2, with taste, cost and safety notes.
What is decaf coffee, how is it made and how much caffeine is left? A practical 2026 guide to decaffeination methods, taste, health facts and buying decaf green beans.