http://yourtotalhealth.ivillage.com/diet-fitness/coffee-weight-loss.html...Although we may not be ready to say that something as basic to American life as coffee is a "drug," we can certainly say that it has druglike properties:
* It's addictive.
* It's a stimulant.
* It alters mood.
And -- it's not good for weight loss.
There are two basic reasons coffee is a problem for the person trying to lose weight. (It's no bargain for the person who isn't either, by the way). The first reason is psychological, the second physiological.
Psychological
Coffee fits neatly into the receptors for a brain chemical known as adenosine, which is partly responsible for calming you down. By interrupting the activity of adenosine, coffee makes you feel awake and wired. You may think that's a good thing, but consider that virtually every study of PMS has implicated caffeine as a major culprit. The added stimulation and nervousness from the coffee makes you feel edgy at exactly the time that feeling calm would be a blessing. And the blood sugar fluctuations it produces contributes enormously to cravings.
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Coffee also increases urinary secretion of important minerals such as magnesium, potassium and sodium and uses up a fair amount of vitamin B1. Not only that, the coffee plant itself is a virtual repository for toxins such as pesticides and other harmful chemicals. (If you still insist on drinking it after reading this article, consider buying organic). And it can raise blood pressure and interfere with sleep.