The Chinese have known about the medicinal benefits of green tea since ancient times. They used it to treat everything from headaches to depression. Scientific research is providing hard evidence for the health benefits long associated with drinking green tea. Many things make green tea very special.
Green tea is rich in catechin polyphenols, particularly epigallocatechin gallant (EGCG). EGCG is a powerful anti-oxidant. According to researchers besides inhibiting the growth of cancer cells, it kills cancer cells without harming healthy tissues. Research has also found its effectiveness in lowering LDL cholesterol and reducing abnormal formations of clots. Green tea comes from the leaves of the Camellia sinensis plant. What sets green tea apart is the way it is processed. Green tea leaves are steamed, which prevents the EGCG compound from being oxidized.
Some varieties of green tea may contain caffeine which causes insomnia in some cases. Although decaffeinated green teas are available, decaf green tea is lower in catechins which mean the health benefits are reduced. Some people experience mild gastrointestinal upset from drinking green tea. This is most likely due to the tannins found in green tea. The tannins found in tea can reduce absorption of iron in the diet which could increase the risk of iron deficiency. Thus experts say that if you have pre-existing conditions that makes you vulnerable to the side effects of drinking green tea appropriate consultation with experts need to be done.