Coffee and its Effects on Humans

III. CONCLUSION:

      Coffee, in its many varieties, is one of the most common drinks throughout the world. Water may be the only liquid that is more common.
Coffee may also be one of the worst drinks because of its many adverse effects on human beings by way of the caffeine it contains.
The most common sources of caffeine are coffee beans, tea, cola nuts, and cocoa beans.
We all know caffeine is a stimulant. That is why it is used as an eye-opener at breakfast time, a pick-upper at any time of the day, and a no-dozer at bedtime.
It takes six to eight cups of coffee consumed within two to three hours to reach stimulating effects. So, much of the time its effect is more psychological than real.
However, some people are sensitive to even small amounts of caffeine and may notice its effects in the form of headaches, upset stomach, and rapid or irregular heart rate.
There is no significant difference in the caffeine content of drip, percolated, brewed, or instant coffee. Tea, hot chocolate, and cola-flavored soft drinks contain about one-third as much caffeine as coffee. Decaffeinated coffee and tea has almost none.
      Caffeine works on the body by increasing the heart rate, digestive secretions, respiratory rate, metabolic rate, and urine output. It also can cause headache, irritability, insomnia, diarrhea, depression, and hyperactivity.
It is an addictive drug, not unlike the nicotine of tobacco. It is not uncommon for some individuals to drink 20 to 30 cups of coffee a day. The cola-flavored drinks are consumed by some people in quantities as much as a six-pack or more daily.
For those who become used to this kind of volume and suddenly stop, withdrawal symptoms are experienced just as with other abused things such as tobacco, alcohol and drugs.
It is to be used with carefulness in the presence of heart trouble, high blood pressure, problems with the circulation, and certain upsets of the gastrointestinal tract such as chronic indigestion, peptic ulcer, colitis, and rectal inflammations. Recurring bladder inflammations can result from the irritating effects of caffeine in coffee, tea, and chocolate
      Caffeine does not appear to directly cause any permanent, severe malady such as cancer. Moderation often can obliterate smaller, undesired effects. Although the controversy over caffeine's safety has settled in recent years, no research has extinguished the ambiguity. Further research is imperative to completely understand the effect of caffeine on the human body.