Green tea is made from the Camellia sinensis plant. Its dried leaves and leaf buds are used to make various types of tea.
Green tea contains important molecules called polyphenols, which are responsible for many of its health benefits. One cup of green tea typically contains 178-823 mg of specific polyphenols called catechins.
How long will it take for green tea to start working?
The effect of green tea occurs within 30 minutes and lasts at least 90 minutes. Drinking green tea in moderation (about 8 cups daily) is probably safe for most people.
Drinking large amounts can cause side effects due to the caffeine content. These side effects can range from mild to serious and include headache and irregular heartbeat.
Green tea extract also contains a chemical that has been linked to liver damage when used in high doses.
Health Benefits of Green Tea
Drinking green tea is associated with a reduced risk of clogged arteries. It appears to be stronger in men than in women. Also, people who drink at least three cups of green tea daily have a lower risk of developing heart disease. Drinking green tea is associated with a reduced risk of developing endometrial cancer and ovarian cancer.
The caffeine in green tea may raise blood pressure, but this effect may be less in people who regularly consume green tea or other sources of caffeine.
