Is it okay to drink green tea daily?(Tea box)
Green tea is made from the Camellia sinensis plant. Its dried leaves and leaf buds are used to make several different teas, including black and oolong teas.
Green tea is prepared by steaming and pan-frying the Camellia sinensis leaves and then drying them. Green tea is not fermented, so it’s able to maintain important molecules called polyphenols, which seem to be responsible for many of its benefits. It also contains caffeine.
People commonly use a US FDA-approved prescription product containing green tea for genital warts. As a drink or supplement, green tea is sometimes used for high cholesterol, high blood pressure, to prevent heart disease, and to prevent ovarian cancer. It is also used for many other conditions, but there is no good scientific evidence to support most of these uses.
Likely Effective for(Tea box)
A sexually transmitted infection that can lead to genital warts or cancer (human papillomavirus or HPV). A specific green tea extract ointment (Polyphenon E ointment 15%) is available as a prescription product for treating genital warts. Applying the ointment for 10-16 weeks seems to clear these types of warts in 24% to 60% of patients.
Possibly Effective for(Tea box)
Heart disease. Drinking green tea is linked to a reduced risk of clogged arteries. The link seems to be stronger in males than in females. Also, people who drink at least three cups of green tea daily might have a lower risk of death from heart disease.
Cancer of the lining of the uterus (endometrial cancer). Drinking green tea is linked to a reduced risk of developing endometrial cancer.
High levels of cholesterol or other fats (lipids) in the blood (hyperlipidemia). Taking green tea by mouth seems to reduce low-density lipoprotein (LDL or “bad”) cholesterol by a small amount.
Ovarian cancer. Regularly drinking tea green seems to reduce the risk for ovarian cancer.
There is interest in using green tea for a number of other purposes, but there isn’t enough reliable information to say whether it might be helpful.(Tea box)
When taken by mouth: Green tea is commonly consumed as a beverage. Drinking green tea in moderate amounts (about 8 cups daily) is likely safe for most people. Green tea extract is possibly safe when taken for up to 2 years or when used as a mouthwash, short-term.
Drinking more than 8 cups of green tea daily is possibly unsafe. Drinking large amounts might 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 with liver injury when used in high doses.
When applied to the skin: Green tea extract is likely safe when an FDA-approved ointment is used, short-term. Other green tea products are possibly safe when used appropriately.
When applied to the skin: Green tea extract is likely safe when an FDA-approved ointment is used, short-term. Other green tea products are possibly safe when used appropriately. Pregnancy: Drinking green tea is possibly safe in amounts of 6 cups per day or less. This amount of green tea provides about 300 mg of caffeine. Drinking more than this amount during pregnancy is possibly unsafe and has been linked to an increased risk of miscarriage and other negative effects. Also, green tea might increase the risk of birth defects associated with folic acid deficiency.
Breast-feeding: Caffeine passes into breast milk and can affect a nursing infant. Closely monitor caffeine intake to make sure it is on the low side (2-3 cups per day) while breast-feeding. High intake of caffeine while breast-feeding can cause sleep problems, irritability, and increased bowel activity in breast-fed infants.
Children: Green tea is possibly safe for children when taken by mouth in amounts commonly found in foods and beverages, or when gargled three times daily for up to 90 days. There isn’t enough reliable information to know if green tea extract is safe when taken by mouth in children. There’s some concern that it might cause liver damage.
Anemia: Drinking green tea may make anemia worse.
Anxiety disorders: The caffeine in green tea might make anxiety worse.
Bleeding disorders: The caffeine in green tea might increase the risk of bleeding. Don’t drink green tea if you have a bleeding disorder.
Heart conditions: When taken in large amounts, the caffeine in green tea might cause irregular heartbeat.
Diabetes: The caffeine in green tea might affect blood sugar control. If you drink green tea and have diabetes, monitor your blood sugar carefully.
Diarrhea: The caffeine in green tea, especially when taken in large amounts, can worsen diarrhea.
Seizures: Green tea contains caffeine. High doses of caffeine might cause seizures or decrease the effects of drugs used to prevent seizures. If you have ever had a seizure, don’t use high doses of caffeine or caffeine-containing products such as green tea.
Glaucoma: Drinking green tea increases pressure inside the eye. The increase occurs within 30 minutes and lasts for at least 90 minutes.
High blood pressure: The caffeine in green tea might increase blood pressure in people with high blood pressure. But this effect might be less in people who consume caffeine from green tea or other sources regularly.
Irritable bowel syndrome (IBS): Green tea contains caffeine. The caffeine in green tea, especially when taken in large amounts, might worsen diarrhea in some people with IBS.
Liver disease: Green tea extract supplements have been linked to rare cases of liver damage. Green tea extracts might make liver disease worse. Talk to your doctor before taking green tea extract. Drinking green tea in normal amounts is still probably safe.
Weak bones (osteoporosis): Drinking green tea can increase the amount of calcium that is flushed out in the urine. This might weaken bones. If you have osteoporosis, don’t drink more than 6 cups of green tea daily. If you are generally healthy and get enough calcium from your food or supplements, drinking about 8 cups of green tea daily doesn’t seem to increase the risk of getting osteoporosis.
Post time: Nov-18-2024