There are three main types of tea: green, black and oolong. Each tea is processed in a particular way to give it a distinct flavor. Green tea is produced from unfermented tea leaves. Because green tea is widely consumed around the world, second only to water, scientists have studied the benefits of green tea extensively. Speak with your doctor before using green tea to treat a medical condition or to soothe the symptoms of an illness.
What is Green Tea Made Of?
Green tea is composed of the steamed, dried leaves of the Camellia sinensis plant, which is native to Asia. Scientists believe that green tea retains large levels of antioxidants because it is steamed, not fermented like other types of tea. The antioxidants, known as polyphenols, in green tea scavenge free radicals, chemicals that can cause disease and aging. Green tea also contains alkaloids, or stimulants, including caffeine. Interestingly, L-theanine, an amino acid in green tea, has a calming effect on the nervous system, possibly counteracting the alkaloids' stimulant effect.
Benefits of Green Tea
Green tea has been connected to cancer prevention, lower cholesterol and diabetes control. Green tea also is used to treat inflammation of the bowels, especially in patients with Crohn's and colitis. In ancient and traditional medicine practices, green tea is used as an astringent and diuretic. Because of the caffeine content in green tea, it promotes excretion of bodily fluids, including urine and stool. Consult with your physician before using green tea to treat a medical condition.
Recommended Intake
Green tea is not recommended for children, especially because of its caffeine content. Adults should consume 2 to 3 cups of green tea each day for up to 320 mg of polyphenols. Caffeine-free green tea is available and recommended.
Precautions
Green tea is an herb that can interact with other medicines, supplements and herbal treatments. Consult with your doctor before drinking green tea if you are taking any medications, supplements or herbal treatments. Excessive amounts of caffeine can cause dizziness, heart palpitations, loss of appetite and diarrhea. If you begin to experience diarrhea, stop drinking green tea and consult a doctor immediately.
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