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Tea

NEWS:

Drinking Tea May Offer Health Benefits, But Evidence Still Limited “Black, oolong, green or white teas have a common origin. Each is produced from the leaves of the Camellia sinensis bush. The leaves are loaded with flavonoids and other polyphenols that work as antioxidants, possibly lowering the risk of some diseases. … While there’s still much to learn about tea’s health benefits, the potential benefits seem to be in the cup, not in supplements or tea extract capsules. So far, there’s no certainty that the compounds in supplements are the same ones in tea, and even less certainty that these supplements might provide the same potential health benefits as tea.”

Drinking Tea May Slow Bone Loss: Study Shows Elderly Tea Drinkers Have Higher Bone Density

Green Tea Lowers Risk of Heart Disease: Drinking Green Tea Boosts the Health of Blood Vessels Within Minutes “Drinking green tea rapidly improves the health of the delicate cells lining the blood vessels and helps lower one's risk of heart disease. Researchers writing in the latest issue of the European Journal of Cardiovascular Prevention and Rehabilitation have found that people who drink green tea have better blood vessel function just 30 minutes later. Specifically, green tea improves the function of endothelial cells. Endothelial cell dysfunction plays a key role in the development of clogged arteries, a process called atherosclerosis. The finding adds to a growing body of evidence that suggests that powerful antioxidants in green tea called flavonoids may protect the heart. Other flavonoid-rich foods include red grapes, red wine, and dark chocolate. The study authors say their results are the first to show that green tea offers a short-term improvement in the health of arteries. Black tea has previously been linked to short- and long-term improvements in endothelial function.“

Green tea may shield brain from sleep apnea effects “Compounds found in green tea may help ward off the neurological damage that can come with the breathing disorder sleep apnea, a new animal study hints. Researchers found that when they added green tea antioxidants to rats' drinking water, it appeared to protect the animals' brains during bouts of oxygen deprivation designed to mimic the effects of obstructive sleep apnea (OSA). The findings suggest that green tea compounds should be further studied as a potential OSA therapy, the researchers report in the American Journal of Respiratory and Critical Care Medicine. OSA is a common disorder in which soft tissues in the throat temporarily collapse and block the airway during sleep, causing repeated stops and starts in breathing throughout the night. The immediate symptoms include chronic loud snoring and gasping, as well as daytime sleepiness. Left untreated, OSA can eventually have widespread effects in the body; it's linked to high blood pressure, and research suggests that the intermittent dips in oxygen to the brain may lead to memory and learning difficulties.“

Iced Teas Pose High Risk of Kidney Stones

Tea Drinking May Help Protect Against Cognitive Impairment and Decline “Regular tea consumption was associated with lower risks for cognitive impairment and cognitive decline, according to the results of a study reported in the July issue of the American Journal of Clinical Nutrition.”

ARTICLES:

JOURNAL ARTICLES:

A review of the epidemiological evidence on tea, flavonoids, and lung cancer. (J Nutr. 2008)

An exposure and risk assessment for fluoride and trace metals in black tea. (J Hazard Mater. 2008)

Antioxidant activity and polyphenol content of green tea flavan-3-ols and oligomeric proanthocyanidins. (Int J Food Sci Nutr. 2008)

Antioxidant effects of green tea and its polyphenols on bladder cells. (Life Sci. 2008) “ … suggesting that green tea polyphenols can protect against oxidative stress/damage and bladder cell death.”

Consumption of green tea favorably affects oxidative stress markers in weight-trained men. (Nutrition. 2008)

Consumption of green and roasted teas and the risk of stroke incidence: results from the Tokamachi-Nakasato cohort study in Japan. (Int J Epidemiol. 2008) “CONCLUSIONS: Green tea consumption is associated with a reduced risk of total stroke incidence, cerebral infarction and cerebral haemorrhage.”

Differential Effects of Black versus Green Tea on Risk of Parkinson's Disease in the Singapore Chinese Health Study (American Journal of Epidemiology 2008) “Green tea drinking was unrelated to Parkinson's disease risk. Diet had no strong influence on risk. Ingredients of black tea other than caffeine appear to be responsible for the beverage's inverse association with Parkinson's disease.”

Green tea catechins prevent cognitive deficits caused by Abeta(1-40) in rats. (J Nutr Biochem. 2008) “Our results suggest that long-term administration of green tea catechins provides effective prophylactic benefits against Abeta-induced cognitive impairment by increasing antioxidative defenses.”

Green tea consumption and liver disease: a systematic review (Liver International 2008) “Conclusions: An increased consumption of green tea may reduce the risk of liver disease.“

Green tea consumption is associated with decreased DNA damage among GSTM1-positive smokers regardless of their hOGG1 genotype. (J Nutr. 2008)

Green Tea Helps Beat Superbugs, Study Suggests “Green tea also made 20% of drug-resistant bacteria susceptible to one of the cephalosporin antibiotics. These are important antibiotics that new drug resistant strains of bacteria have evolved to resist. The results surprised the researchers, showing that in almost every case and for all types of antibiotics tested, drinking green tea at the same time as taking the medicines seemed to reduce the bacteria's drug resistance, even in superbug strains, and increase the action of the antibiotics. In some cases, even a low concentration of green tea was effective.“

Green tea intake, MTHFR/TYMS genotype, and breast cancer risk: The Singapore Chinese Health Study. (Carcinogenesis. 2008)

Tea consumption and cognitive impairment and decline in older Chinese adults (American Journal of Clinical Nutrition 2008) “Conclusion: Regular tea consumption was associated with lower risks of cognitive impairment and decline. “

Tea Consumption Is Inversely Associated With Carotid Plaques in Women (Arteriosclerosis, Thrombosis, and Vascular Biology. 2008 ) “Conclusion— In a large sample of elderly community subjects we showed for the first time that carotid plaques were less frequent with increasing tea consumption in women. Our aim was to assess the relationship of tea consumption with common carotid artery intima-media thickness and carotid plaques in a large population-based sample of elderly subjects. Increasing daily tea consumption was associated with a lower prevalence of carotid plaques in women, independently of vascular risk factors and dietary habits. “

Tea polyphenols benefit vascular function. (Inflammopharmacology. 2008)

The acute effect of green tea consumption on endothelial function in healthy individuals. (Eur J Cardiovasc Prev Rehabil. 2008) “CONCLUSION: Green tea consumption has an acute beneficial effect on endothelial function, assessed with FMD of the brachial artery, in healthy individuals. This may be involved in the beneficial effect of tea on cardiovascular risk.”

The relation between green tea consumption and cardiovascular disease as evidenced by epidemiological studies. (J Nutr. 2008)

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