Tea is made from the leaves of a shrub of the Camellia genus.

The Chinese first gathered tea leaves in the wild, and have cultivated the tea plant at least as far back as 350 AD. The court of England?s Charles II in the 17th century established tea as a fashionable drink for the elite.

The firing, fermenting, and/or oxidizing that is done to the leaves determines whether the tea will be green, black, or oolong.

Tea is a source of vitamins A and B6, thiamin, and riboflavin; nicotinic, pantothenic, ascorbic, and folic acids; manganese, potassium, and fluoride.

Flavonoids are found in all types of tea; green tea has the highest concentration. Tea is being studied for its benefits in enhancing immune function, lowering LDL and raising HDL levels, reducing blood pressure, thinning blood, reducing the risk of heart attack, stroke, and cancer, increasing longevity, aiding digestion, and promoting dental health.

There is convincing evidence for a protective effect of both coffee and tea against colorectal cancers, the second leading cause of cancer-related deaths in the United States. High coffee intake decreases the excretion of bile acids, which are suspected carcinogens to the colon. Because of its diuretic properties, caffeine may help lower the risk of bladder cancer.

Greater intakes of coffee and tea, both regular and decaffeinated, were associated with a decreased risk of kidney stone formation, significantly more so than water. (A slight advantage was found in caffeine-containing coffee over decaffeinated.) Interestingly, increased consumption of apple and grapefruit juices correlated with increased risk of stone formation.

One study has found that people who drink coffee are less likely to suffer heart disease than are tea drinkers. This may not, however, be a straight cause-and-effect relationship: possibly people who choose to drink coffee have more youthful/healthful lifestyles in other respects.

Science has debunked the dark myths that caffeine contributes to breast cancer, bladder cancer, ulcers, indigestion, and osteoporosis.

Is there any reason not to consume caffeine? In some patients, caffeine is associated with temporary rises in blood pressure, so people with high blood pressure might be advised to avoid caffeine during high-stress times.

Moreover, those more sensitive to caffeine may not be able to drink coffee or tea late in the day because caffeine delays the onset of sleep. Worse, some people may not be aware that they are not as rested the following day as they should be, and thus may be more prone to fatigue-related accidents.

Is it possible to become addicted to caffeine? Coffee drinkers do not exhibit the behaviors that define addiction?severe withdrawal symptoms, tolerance, the need to consume the addictive substance at all costs, and antisocial behavior including crimes. Neither coffee nor other products containing caffeine are classified by drug dependence experts as addictive.

Nevertheless, giving up caffeine suddenly can be unpleasant. The most common withdrawal symptoms include headaches, fatigue, drowsiness, irritability, depression, and flu-like feelings. Weaning oneself gradually?say, over a week?should minimize the discomfort.

So drink up?without the guilt.

About The Author

Lisa J. Lehr is a freelance writer with a specialty in business and marketing communications. She holds a biology degree and has worked in a variety of fields, including the pharmaceutical industry and teaching, and has a particular interest in health matters. She is also a graduate of American Writers and Artists Institute (AWAI), America?s leading course on copywriting.

Contact Lisa J. Lehr Copywriting www.ljlcopywriting.com, Lisa@ljlcopywriting.com for help with your business writing needs.

This article ©Lisa J. Lehr 2005.