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Last post 17 months ago by burning_sticks. 9 replies replies.
Caffeine and Coffee
Gene363 Offline
#1 Posted:
Joined: 01-24-2003
Posts: 30,874
Testing the actual caffeine content of prepared coffee has some surprising results.

Video: https://www.youtube.com/watch?v=etnMr8oUSDo

Pour over brewing Vs Expresso

Pour over 170mg

Expresso 110mg

Extending the extraction time appears to be a big factor in the amount of caffeine extracted.

Instant Coffee 40 - 60 mg

Roast level

Light 67.5mg

Dark 72mg

it may be that the dark roasted coffee is less dense and allows better extraction of caffeine.




Mr. Jones Offline
#2 Posted:
Joined: 06-12-2005
Posts: 19,467
That is contrary to popular beliefs....

Espresso coniesuers will cry 😭😭😢😭😭
RayR Offline
#3 Posted:
Joined: 07-20-2020
Posts: 8,942
Was that popular belief determined by duhmacracy?

Anyway, extending the extraction time of the Espresso will greatly increase the caffeine extracted. It's SCIENCE!
MACS Offline
#4 Posted:
Joined: 02-26-2004
Posts: 79,888
What about pressed coffee? Is that considered pour over?

I use the Aeropress every morning. Wife likes Taster's Choice instant.
Gene363 Offline
#5 Posted:
Joined: 01-24-2003
Posts: 30,874
MACS wrote:
What about pressed coffee? Is that considered pour over?

I use the Aeropress every morning. Wife likes Taster's Choice instant.


Those are things he plans to test, but in the video he postulates, in so many words, extending the extraction time appears to be a big factor in the amount of caffeine extracted, probably a key factor.
delta1 Offline
#6 Posted:
Joined: 11-23-2011
Posts: 28,823
so the secret to maximum concentration of caffeine in coffee is slow drip?

has he tried running the brewed coffee through the used grounds a second time and then measuring caffeine content?


whatever...even though caffeine is part of the reason I enjoy coffee, it isn't the only thing...taste matters...
Gene363 Offline
#7 Posted:
Joined: 01-24-2003
Posts: 30,874
delta1 wrote:
so the secret to maximum concentration of caffeine in coffee is slow drip?

has he tried running the brewed coffee through the used grounds a second time and then measuring caffeine content?


whatever...even though caffeine is part of the reason I enjoy coffee, it isn't the only thing...taste matters...


Not in this video.

Percolator coffee, multiple passes through the grounds.
Sunoverbeach Offline
#8 Posted:
Joined: 08-11-2017
Posts: 14,715
MACS wrote:
What about pressed coffee? Is that considered pour over?

I use the Aeropress every morning. Wife likes Taster's Choice instant.

He actually touched a bit on the Aeropress around the 8min mark, when he took a look at the effect of steep time.
burning_sticks Offline
#9 Posted:
Joined: 08-17-2020
Posts: 152
Gene363 wrote:
Not in this video.

Percolator coffee, multiple passes through the grounds.


I don't remember the last time I saw a perculator, other than the old one I use on my camping stove.
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