... it is a member of the xanthine group of chemicals,which also includes theophylline,an ingredient used in asthma medication,and theobromine,found in tea and cola drinks.the first verifiable use of caffeine was more than 2000years ago among ethiopian tribesmen who ate a mixture of raw coffee beans and fat. caffeine has no real nutritional role, but millions
of people worlwide insist they "can't get started "without a morning cup of coffee.to these people,it is,isdeed, important.recent studise confirm what many caffeine users have long been known -the substance is addictive and those who try to give it up suffer withdrawal symptoms.fortunately, caffeine addiction is relatively benign, especially when compared addictions to nicotine,alcohol,or illegal drugs