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Too much coffee reduces fertility and Green Tea save life

Dutch scientists have suggested that drinking too much coffee and alcohol can lower pregnancy chances in women with poor fertility.

According to a recent study, drinking more than four cups of coffee a day reduces the likelihood of conception chance by 26%, as caffeine has toxic effects on the ovaries and sperm.

Radboud University researchers reported that drinking alcohol at least three times a week has similar effects in the pregnancy process to excessive caffeine intake.

Findings show that smoking more than one cigarette per day and being overweight also impede pregnancy.

The study revealed that IVF success rate drops from 15% to 5% in a 36-year-old overweight woman who smokes and drinks too much coffee and alcohol.

Researchers concluded that patients can increase the chance of spontaneous IVF pregnancy by following a healthy lifestyle.

Green tea reduces heart disease

Greek scientists have found that regularly drinking green tea can significantly reduce cardiovascular-related morbidity and mortality.

According to a study published in the European Journal of Cardiovascular Prevention and Rehabilitation, green tea improves the function of endothelial cells that line the blood vessels and prevent the progression of atherosclerosis.

Athens Medical School researchers believe that the high flavonid content of green tea is responsible for improved endothelial function.

Findings reveal that compared to black tea, green tea flavonoids are more potent antioxidants as they do not undergo oxidization.

Previous studies had reported that drinking green tea has various health benefits; it is associated with a reduced risk of diabetes and certain malignancies, particularly prostate cancer.

Green tea may shield sleep apnea

Compounds found in green tea may help ward off the neurological damage that can come with the breathing disorder sleep apnea, a new 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.

In the new study, Dr. David Gozal and colleagues at the University Of Louisville School Of Medicine in Kentucky looked at whether green tea compounds called catechin polyphenols could help shield the brain from this oxygen deprivation.

Catechin polyphenols act as antioxidant, which means they help neutralize cell-damaging particles called oxygen free radicals.

Free radicals are normal by products of metabolism, but in excess they lead to a state known as oxidative stress.

It’s thought that the oxygen deprivation of OSA leads to oxidative stress, and that this, at least in part, explains the cognitive problems seen in some people with the sleep disorder.

Gozal and his colleagues found that when rats were exposed to periodic bouts of oxygen deprivation over 14 days, it did boost signs of oxidative stress in the brain.

This didn’t happen, however, if rats had been given water containing green tea polyphenols.

What’s more, compared with rats given plain water, these animals performed better on a standard test of learning and memory — a water “maze” designed to encourage the animals to remember the location of an escape platform.

In theory, Gozal said, a regular cup of green tea could be beneficial, used alongside standard OSA treatment.

“However,” he said, “definitive proof that green tea would help will have to await a trial in human patients.”


This fact sheet provides basic information about green tea–common names, uses, potential side effects, and resources for more information. All types of tea (green, black, and oolong) are produced from the Camellia sinensis plant using different methods. Fresh leaves from the Camellia sinensis plant are steamed to produce green tea.

Common Names–green tea, Chinese tea, Japanese tea

Latin Names–Camellia sinensis

What It Is Used For

Green tea and green tea extracts, such as its component EGCG, have been used to prevent and treat a variety of cancers, including breast, stomach, and skin cancers.

Green tea and green tea extracts have also been used for improving mental alertness, aiding in weight loss, lowering cholesterol levels, and protecting skin from sun damage.

Green tea could prevent bladder cancer spreading

Green tea can not only lower cholesterol, reduce blood pressure and boost the immune system, it can also help fight cancer.

The health benefits of green tea have been known for a long time: it can lower cholesterol, reduce blood pressure and boost the immune system. Now, it appears, it can also help fight cancer.

Numerous studies, including those involving animals, have shown that green tea not only induces death in cancer cells, but also slows development of the independent blood supply that cancers develop so they can grow and spread.

A recent study demonstrated that green tea extract interrupts a process that is crucial in allowing bladder cancer to become invasive and spread to other areas of the body.

How It Is Used

Green tea is usually brewed and drunk as a beverage. Green tea extracts can be taken in capsules and are sometimes used in skin products.

What the Science Says

Laboratory studies suggest that green tea may help protect against or slow the growth of certain cancers, but studies in people have shown mixed results.

Some evidence suggests that the use of green tea preparations improves mental alertness, most likely because of its caffeine content. There are not enough reliable data to determine whether green tea can aid in weight loss, lower blood cholesterol levels, or protect the skin from sun damage.

Side Effects and Cautions

• Green tea is safe for most adults when used in moderate amount.

• Green tea and green tea extracts contain caffeine. Caffeine can cause insomnia, anxiety, irritability, upset stomach, nausea, diarrhea, or frequent urination in some people. Caffeine can also raise blood pressure, and in very high doses, it can cause seizures, delirium, or irregular heart rhythms.

• Green tea contains small amounts of vitamin K, which can make anticoagulant drugs, such as warfarin, less effective.


July 28, 2008 - Posted by | health |

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