For now, let's look at some of the evidence on caffeine's addictive potential.
We know that caffeine is a stimulant. Stimulants elevate heart rate and blood pressure, can make us more alert and may even improve performance in certain sports. In fact, the International Olympic Committee, in its doping regulations, has in the past included caffeine on its list of restricted agents. What's more, like other stimulants, caffeine may cause a physiological dependency. That's what the Johns Hopkins researchers suggested with their study.
In their report, the researchers found five main withdrawal symptoms: headaches (the most common), fatigue, changes in mood (including depression), inability to concentrate and even flu-like symptoms. Many people had withdrawal symptoms (50% had headaches), but for most, the symptoms weren't overwhelming. However, one in eight (13%) were substantially impaired, experiencing headaches and/or other withdrawal symptoms severe enough to keep them from their...
2007-04-25
03:09:21
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