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“While green tea is generally safe, excessive consumption (over 3-4 cups per day) may cause side effects like insomnia, gastrointestinal distress, or liver damage due to high caffeine or ...
1912 advertisement for tea in the Sydney Morning Herald, describing its supposed health benefits. The health effects of tea have been studied throughout human history. In clinical research conducted over the early 21st century, tea has been studied extensively for its potential to lower the risk of human diseases, but there is no good scientific evidence to support any therapeutic uses other ...
Green tea is a type of tea made from the leaves and buds of the Camellia sinensis that have not undergone the withering and oxidation process that creates oolong teas and black teas. [1] Green tea originated in China in the late 1st millennium BC, and since then its production and manufacture has spread to other countries in East Asia.
Black or green tea (55 milligrams) Coffee (80-200 milligrams) ... “I advise limiting caffeine as much as possible due to side effects like poor sleep and anxiety,” she says.
When taken orally, EGCG has poor absorption even at daily intake equivalent to 8–16 cups of green tea, an amount causing adverse effects such as nausea or heartburn. [4] After consumption, EGCG blood levels peak within 1.7 hours. [5] The absorbed plasma half-life is ~5 hours, [5] but with majority of unchanged EGCG excreted into urine over 0 ...
Green tea may also improve mood, exhibiting antidepressant and anti-anxiety qualities. One factor may be the presence of L-theanine, an amino acid naturally found in the leaves of green tea.