Although many people enjoy coffee ,they find that it can make them nervous. If they drink too much of it, caffeine which is the primary active ingredient in coffee, can become addictive. Many people find that when they try to quit drinking coffee, they often develop headaches and other symptoms of withdrawal furthermore. It has been found that caffeine may contribute to breast disease in women under forty one must admit. However that there is nothing like a good cup of coffee first .thing in the morning personally. I can not imagine life without it