Slashdot Mirror


Caffeine Addicts Get No Additional Perk, Only a Return To Baseline

Dthief writes "Bristol University researchers found that coffee drinkers develop a tolerance to both the anxiety-producing and the stimulating effects of caffeine, meaning that it only brings them back to baseline levels of alertness, not above them. 'Although frequent consumers feel alerted by caffeine, especially by their morning tea, coffee, or other caffeine-containing drink, evidence suggests that this is actually merely the reversal of the fatiguing effects of acute caffeine withdrawal,' wrote the scientists, led by Peter Rogers of Bristol's department of experimental psychology."

10 of 506 comments (clear)

  1. Sure they do... by jbezorg · · Score: 3, Informative

    There is another stimulating effect of caffeine that the article does not address.

    Caffeine is a diuretic.

    --
    I've lost all my marbles except one & It's fun to test angular & centripetal acceleration in my skull
  2. Re:A return to baseline... by spun · · Score: 3, Informative

    I believe it's called 'homeostasis.'

    --
    - None can love freedom heartily, but good men; the rest love not freedom, but license. -- John Milton
  3. Re:The truth about caffeine by Anonymous Coward · · Score: 3, Informative

    as a caffeine addict in the uk, I can definitely say that we suffer from caffeine withdrawal symptoms here. At least, I do.

  4. Re:The truth about caffeine by ColdWetDog · · Score: 4, Informative

    Hypertension, Heart Problems.

    No

    and

    No

    Hard to prove a negative, but for a drug, caffeine has been remarkably safe.

    (Appropriate Heinlein quote "Man is not a rational animal, he is a rationalizing animal".

    --
    Faster! Faster! Faster would be better!
  5. Re:well GREAT by Anonymous Coward · · Score: 5, Informative

    Adderall is speed (amphetamine/dextroamphetamine), not meth. Meth is sold medically under the brand name Desoxyn but prescription is rare.

  6. Re:Makes sense by mattack2 · · Score: 3, Informative

    I used to drink tons of soda (even more caffeine than coffee)

    [citation needed]

    How much soda were you drinking at one time?

    From http://www.mayoclinic.com/health/caffeine/an01211
    generic brewed coffee has (on the low end) 95 mg of caffeine in 8 oz. (200 mg on the high end)
    Mountain dew has 54 mg for 12 oz. (Vault has 71 mg, but Mt. Dew is "well known" as having high caffeine, and besides Vault is the highest in the list shown on that page.)

    So if you drank a lot of soda, over the course of the day you'd likely get more caffeine than one cup of coffee a day.. But IMHO, do typical coffee drinkers drink only one cup a day? I don't think so.

  7. Re:It could be that... by A+beautiful+mind · · Score: 5, Informative
    This is the reason I highly dislike the mainstream media. I guess it's okay for them to at least try to summarize research, even though they fail horribly most of the time, but for fuck's sake at least provide a link to the original research or at least the press release from the university!

    A much better test would be to actually TEST their alertness, instead of relying on a subjective self-assessment.

    They did that. From the press release:

    Approximately half of the participants were non/low caffeine consumers and the other half were medium/high caffeine consumers. All were asked to rate their personal levels of anxiety, alertness and headache before and after being given either the caffeine or the placebo. They were also asked to carry out a series of computer tasks to test for their levels of memory, attentiveness and vigilance.

    --
    It takes a man to suffer ignorance and smile
    Be yourself no matter what they say
  8. Re:well GREAT by Anonymous Coward · · Score: 4, Informative

    In common parlance all stimulants that are not cocaine and don't have hallucinogenic effects are referred to as "speed". Examples include amphetamine, dextroamphetamine, methamphetamine, cathinone, methcathinone, methylphenidate, and even modafinil.

    "Meth" is generally reserved for the easily smoked pure crystals of methamphetamine.

  9. Re:Makes sense by Hatta · · Score: 4, Informative

    Not having coffee results in the same amount of wakefulness, only without the money spent on coffee.

    But without the joy of starting the morning with a rich, complex, and delicious brew. When you consider how much flavor you get out of it, a bag of coffee beans is really inexpensive. You could spend $5 on a bar of gourmet chocolate or a bit of fancy cheese and it will be gone in a few days. Spend the same $5 on a half pound of coffee beans and it will last for 2 weeks.

    There's really no downside to being addicted to something that's so cheap and plentiful. It's low in calories, inexpensive, and really fucking delicious. Why quit?

    --
    Give me Classic Slashdot or give me death!
  10. Re:A return to baseline... by xeoron · · Score: 4, Informative

    Interesting, especially since that, for me, exercise always wakes me up far more and longer than some stimulating drink. Very helpful when I am overtired for work one morning and I choose to bike to work.