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    Jolie Rouge's Avatar
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    Caffeine addicts get no real perk from morning cup

    Caffeine addicts get no real perk from morning cup
    Wed Jun 2, 10:28 am ET



    LONDON (Reuters) – Caffeine addiction is such a downer that regular coffee drinkers may get no real pick-me-up from their morning cup, according to a study by British scientists.

    Bristol University researchers found that 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.

    The team asked 379 adults -- half of them non/low caffeine consumers and the other half medium/high caffeine consumers -- to give up caffeine for 16 hours, and then gave them either caffeine or a dummy pill known as a placebo.

    Participants rated their levels of anxiety, alertness and headache. The medium/high caffeine consumers who got the placebo reported a decrease in alertness and increased headache, neither of which were reported by those who received caffeine.

    But measurements showed that their post-caffeine levels of alertness were actually no higher than the non/low consumers who received a placebo, suggesting caffeine only brings coffee drinkers back up to "normal."

    The researchers also found that people who have a genetic predisposition to anxiety do not tend to avoid coffee.

    In fact, people in the study with a gene variant associated with anxiety tended to consume slightly larger amounts of coffee than those without it, Rogers wrote in a study in the Neuropsychopharmacology journal, published by Nature.

    This suggests that a mild increase in anxiety "may be a part of the pleasant buzz caused by caffeine," he said.

    http://news.yahoo.com/s/nm/20100602/...NsawNwcmludA--

    Laissez les bon temps rouler! Going to church doesn't make you a Christian any more than standing in a garage makes you a car.** a 4 day work week & sex slaves ~ I say Tyt for PRESIDENT! Not to be taken internally, literally or seriously ....Suki ebaynni IS THAT BETTER ?

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    Coffee has never had the effect on me sleeping wise, I can drink a couple cups right before bed time and be able to snooze no problem. But, if it's a cappacino or those iced drinks or something, those wake me right up!!

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    If I have a lab appointment first thing in the morning where you cant eat or drink anything, my blood pressure is way noticeably lower than normal. I know im addicted to it and I dont like the idea of that. Im seriously considering cutting it out.

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    5 health reasons to not quit coffee.
    by The Editors of EatingWell Magazine, on Thu Mar 3, 2011 8:15am
    By Kerri-Ann Jennings, M.S., R.D., Associate Nutrition Editor at EatingWell Magazine

    http://shine.yahoo.com/channel/healt...offee-2460820/

    I really like coffee. The morning ritual of brewing a cup, the smell that perks me up before I take a sip and, of course, the flavor all make it my favorite beverage aside from water (water’s delicious!). As a registered dietitian and a nutrition editor for EatingWell Magazine, I know that coffee is fine in moderation. It has lots of antioxidants and is low in calories if you don’t load it up with cream and sugar. Nonetheless, I always feel slightly guilty about drinking it—you know, in a “it’s so good, it must be bad” kind of way.

    Which is why I’m always delighted to hear of new reasons that coffee is good for your health...and there are plenty! Over 18,000 studies on coffee have been published in the past few decades, revealing these benefits, many of which Joyce Hendley wrote about in the March/April issue of EatingWell Magazine:

    1. It protects your heart: Moderate coffee drinkers (1 to 3 cups/day) have lower rates of stroke than noncoffee drinkers, an effect linked to coffee’s antioxidants. Coffee has more antioxidants per serving than blueberries, making it the biggest source of antioxidants in American diets. All those antioxidants may help suppress the damaging effect of inflammation on arteries. Immediately after drinking it, coffee raises your blood pressure and heart rate, but over the long term, it actually may lower blood pressure as coffee’s antioxidants activate nitric oxide, widening blood vessels.

    2. It diverts diabetes: Those antioxidants (chlorogenic acid and quinides, specifically) play another role: boosting your cells’ sensitivity to insulin, which helps regulate blood sugar. In fact, people who drink 4 or more cups of coffee each day may have a lower risk of developing type 2 diabetes, according to some studies. Other studies have shown that caffeine can blunt the insulin-sensitivity boost, so if you do drink several cups a day, try mixing in decaf occasionally.

    3. Your liver loves it: OK, so the research here is limited, but it looks like the more coffee people drink, the lower their incidence of cirrhosis and other liver diseases. One analysis of nine studies found that every 2-cup increase in daily coffee intake reduced liver cancer risk by 43 percent. Again, it’s those antioxidants—chlorogenic and caffeic acids—and caffeine that might prevent liver inflammation and inhibit cancer cells.

    4. It boosts your brain power: Drinking between 1 and 5 cups a day (admittedly a big range) may help reduce risk of dementia and Alzheimer’s disease, as well as Parkinson’s disease, studies suggest. Those antioxidants may ward off brain cell damage and help the neurotransmitters involved in cognitive function to work better.

    5. It helps your headaches: And not just the withdrawal headaches caused by skipping your daily dose of caffeine! Studies show that 200 milligrams of caffeine—about the amount in 16 ounces of brewed coffee—provides relief from headaches, including migraines. Exactly how caffeine relieves headaches isn’t clear. But scientists do know that caffeine boosts the activity of brain cells, causing surrounding blood vessels to constrict. One theory is that this constriction helps to relieve the pressure that causes the pain, says Robert Shapiro, M.D., Ph.D., associate professor of neurology and director of the Headache Clinic at the University of Vermont Medical School.

    Now, that’s not to say that coffee doesn’t have any pitfalls—it does. Some people are super-sensitive to caffeine and get jittery or anxious after drinking coffee; habitual coffee drinkers usually develop a tolerance to caffeine that eliminates this problem (but they then need the caffeine to be alert and ward off withdrawal headaches). Coffee can also disturb sleep, especially as people age. Cutting some of the caffeine and drinking it earlier in the day can curb this effect. Lastly, unfiltered coffee (like that made with a French press) can raise LDL cholesterol, so use a filter for heart health.

    But if you like coffee and you can tolerate it well, enjoy it...without the guilt
    Laissez les bon temps rouler! Going to church doesn't make you a Christian any more than standing in a garage makes you a car.** a 4 day work week & sex slaves ~ I say Tyt for PRESIDENT! Not to be taken internally, literally or seriously ....Suki ebaynni IS THAT BETTER ?

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