Latin name: Camellia sinensis
Other name: Chinese Tea
A Remedy For:
Diarrhea
Fatigue
Indigestion
Although Green Tea has not been officially recognized as a medicinal agent, it is known to be effective against diarrhea and upset stomach, while boosting mood and energy. Used as a mouthwash, it fights cavities and plaque. There's also increasing evidence of its ability to fend off certain types of cancer, particularly cancer of the stomach, small intestine, colon, rectum, breast, lung, and pancreas.
What It Is; Why It Works
Green Tea contains caffeine, which stimulates the central nervous system, and tannins, which combat diarrhea. Taken in moderation, it settles the stomach and has mild stimulant effects. In excess, it can cause insomnia and digestive problems.
Green Tea's cancer-fighting properties have been verified in two recent studies. In China, researchers found that as tea consumption increased, the risk of cancer declined. Women who drank the most tea enjoyed a 33 percent reduction in the risk of colon cancer, a 43 percent reduction in the risk of rectal cancer, and a 47 percent reduction in the risk of pancreatic cancer. In Japan, a study of 472 breast cancer patients revealed a significant drop in the rate of recurrence among those drinking 5 or more cups of Green Tea daily.
Green and black tea come from the same plant and differ only in their method of production. Green Tea is dried for a shorter time, and is heated sooner to prevent fermentation. Green Tea is produced in China and Japan; black tea comes from India, Sri Lanka, and Kenya. The plant is also cultivated in Indonesia, Turkey, Pakistan, Malawi, and Argentina.
Avoid If...
Take Green Tea cautiously if you have a weak heart, kidney disease, an overactive thyroid, a susceptibility to spasms, or a tendency to anxiety or panic attacks.
Special Cautions
If you have a sensitive stomach, Green Tea may cause acid stomach, stomach irritation, and poor appetite. Intake of large quantities can lead to constipation or diarrhea. Adding milk to the tea will usually eliminate these side effects by reducing the potency of the tannins.
Possible Drug Interactions
Green Tea interferes with absorption of alkaline medications. If you are taking any medicines, check with your doctor before taking Green Tea.
Special Information If You Are Pregnant or Breastfeeding
Because of its caffeine content, you may want to restrict your intake of Green Tea to no more than 5 cups daily during pregnancy. Although most studies show no harm to the developing baby, some evidence links slower fetal growth to daily intake of 400 milligrams or more of caffeine (6 or more cups of tea). Excessive caffeine intake may also increase the risk of late first or second trimester miscarriage.
Nursing mothers should drink little, if any, Green Tea because, like other beverages containing caffeine, it can cause sleep disorders in infants.
How To Prepare Green tea
To prepare as a beverage, steep a teabag or teaspoon of tea for 3 to 10 minutes. When taking Green Tea for diarrhea, allow extra time. The longer Green Tea brews, the stronger its antidiarrheal effect.
Commercial extracts of Green Tea are available in tablet and capsule form.
Typical Dosage
The usual recommendation is 3 to 4 cups of tea a day. If you are taking Green Tea extract, a dosage of 300 to 400 milligrams is typical. Because potency may vary, follow the manufacturer's instructions whenever available.
Overdosage
Doses of 300 milligrams of caffeine (about 5 cups of tea) can cause restlessness, tremors, and exaggerated reflexes. The first signs of outright poisoning are vomiting and abdominal spasms.
It's impossible to drink enough tea to be fatal. However, regular daily intake of excessive doses (1,500 milligrams of caffeine, or 25 cups of tea) will result in irritability, sleeplessness, irregular heartbeat, dizziness, vomiting, diarrhea, loss of appetite, and headache.