Decaf coffee (or tea) will still have more than zero caffeine. Allowable amounts vary between US and EU, but multiple repetitions of the process are needed to achieve either 97% or 99.9% caffeine free respectively.
A single pass through a decaffeination process can result in leaving up to 20% of the original caffeine content.
Decaf coffee (or tea) will still have more than zero caffeine. Allowable amounts vary between US and EU, but multiple repetitions of the process are needed to achieve either 97% or 99.9% caffeine free respectively.
A single pass through a decaffeination process can result in leaving up to 20% of the original caffeine content.
https://en.wikipedia.org/wiki/Decaffeination