Coffee not Decaf

Reply Subscribe

Thread Tools

Search this Thread

Oct 4, 2009 | 11:35 pm

#16

jackal

FlyerTalk Evangelist

Join Date: Mar 2004

Location: SGF

Programs: AS, AA, UA, AGR S+, Choice Platinum

Posts: 23,317

Quote:

Originally Posted by MDSD

In an average person ~ 13% of caffeine is eliminated each hour; thus, total caffeine elimination usually occurs just short of 8 hours.

citation: Georgetown.edu

I don't have a citation from a prestigious educational institution, but I've seen numerous references to caffeine having a half-life of approximately four hours in the human body. That would fit for the first four hours (13*4=52%), but after that, your formula doesn't fit with the half-life claim (at a flat 13% per hour, you'd be rid of it after 7.6 hours). With a four-hour half-life, after eight hours, your body still has 25% of the original caffeine level left.

Unless you mean that it's a logarithmic scale wherein each hour your body eliminates 13% of what's remaining, in which case, it's closer to the half-life idea (8 hours later, you'd have 32% of caffeine remaining).

Oct 5, 2009 | 6:50 am

#17

magiciansampras

A FlyerTalk Posting Legend

Join Date: Jul 2003

Location: NYC (formerly BOS/DCA)

Programs: UA 1K, IC RA

Posts: 60,745

Quote:

Originally Posted by MDSD

In an average person ~ 13% of caffeine is eliminated each hour; thus, total caffeine elimination usually occurs just short of 8 hours.

citation: Georgetown.edu

This doesn't support your claim nor is it really a cite (how about a link?).

Oct 5, 2009 | 7:12 am

#18

djk7

Join Date: Sep 2002

Location: Orlando, FL, US

Programs: DL-Dirt Medallion;US-Cast Iron Preferred

Posts: 3,617

Quote:

Originally Posted by magiciansampras

Quote:

Originally Posted by MDSD

In an average person ~ 13% of caffeine is eliminated each hour; thus, total caffeine elimination usually occurs just short of 8 hours.

citation: Georgetown.edu

This doesn't support your claim nor is it really a cite (how about a link?).

It's unclear to me if MDSD's post is trying to support or refute -DSH-'s assertion. Add me to the list of skeptics regarding -DSH-'s claim, it certainly doesn't jibe with my personal experience.

Oct 5, 2009 | 7:46 am

#19

magiciansampras

A FlyerTalk Posting Legend

Join Date: Jul 2003

Location: NYC (formerly BOS/DCA)

Programs: UA 1K, IC RA

Posts: 60,745

Quote:

Originally Posted by djk7

It seems like DSH got this info from a student homework sheet that mentions 13% in passing.

http://www.google.com/url?sa=t&sourc...YhiVl1CP_oh-uQ

Oct 5, 2009 | 9:34 am

#20

777-9X

-DSH-

Join Date: Jul 2007

Location: AMS

Programs: BDDC Gold, MR Gold, Hilton Diamond, Hyatt Diamond, EK Plat

Posts: 437

Quote:

Originally Posted by magiciansampras

It seems like DSH got this info from a student homework sheet that mentions 13% in passing.

http://www.google.com/url?sa=t&sourc...YhiVl1CP_oh-uQ

Yep

Oct 5, 2009 | 11:29 am

#21

TMOliver

Join Date: Apr 2005

Location: Central Texas

Programs: Many, slipping beneath the horizon

Posts: 9,859

Quote:

Originally Posted by magiciansampras

I have a friend who used to work at a moderately upscale restaurant as a waitress. She confessed to me that should would routinely pour coffee coffee for people who ordered decaf for a number of reasons. First, decaf wasn't that popular so you would have to brew an additional pot to serve it. Second, she would often forget if folks ordered caf or decaf. Third, she was lazy.

In the lesser class of joints I patronize most often, decaf may only be prepared in the pots with orange rims. Regular coffee made in such pots is automatically transubstantiated into unleaded.

In home environments, when the host(ess) offers offers coffee from a blue-dappled steel pot in which egg shells have been used to settle the grounds during boiling, chances are that the coffee is the super-caf sort, "ethyl".

Reply Subscribe

Reply Share

First
Prev
2 / 2
Next
Last

Forum Jump