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irthomasthomas 2 days ago

Can you actually get caffeine free coffee? I thought most decaf brands where only about 50% less.

hrldcpr 2 days ago | parent [-]

You're right that the caffeine isn't entirely removed, but it's supposedly more than 90% removed.

(I'm even seeing the number 97% mentioned a lot online.)

winrid 2 days ago | parent | next [-]

The bean is already only like 2% caffeine lol so cheap decaf can definitely really be "half caf" even if they say that.

jeffbee 2 days ago | parent | prev [-]

That fraction is going to depend a lot on the definition and the reference. I believe the 97% is the US standard for how much of the natural caffeine in green beans must be removed. You will note how this can be manipulated by using a more caffeine-abundant variety. EU standards are more sensible, stated in terms of caffeine content in the final product.

Either way, commercial decaf processes and normal brewing methods will yield something like 5-10mg of caffeine in a "decaf" dose of coffee, which is an order of magnitude less than usual.