Finally the mainstream market is recognizing the benefits of green tea.
The following quote is from green tea supplier, Japan based, Taiyo.
“The huge consumer interest in foods that can play a role in health and wellbeing has brought green tea squarely into the mainstream,” said Josef Skrna, sales and marketing director at Taiyo Europe. “Antioxidant-rich green tea catechins may help reduce the risk of major health problems such as strokes, heart failure, cancer and diabetes.”
Taiyo said the catechins present in green tea and its extracts burn subcutaneous and visceral fat at a rate 1.3 times higher than caffeine, breaking down stored fat into fatty acids that are burned by the body.
“Green tea is also beneficial in helping lower blood glucose levels, regulating the blood sugar ‘swings’ associated with high GI (glycaemic index) foods – and offering natural aid to the 160 million type-2 diabetes sufferers worldwide,” the company said.
“A further 12-week study reports that catechins contained in green tea activate fat metabolism, resulting in ‘significantly lower’ body fat, particularly abdominal fat.”
A recent study published in Nutrition found extracts from green tea may reduce blood pressure, cholesterol and markers of oxidative stress within three weeks.
The study adds to an ever growing body of science reporting the potential health benefits of green tea and its extracts, which already range from reduced risks of cardiovascular disease, Alzheimer’s, and certain cancers.
Researchers from the Athens Medical School in Greece and published in the European Journal of Cardiovascular Prevention conducted a study which found drinking green tea may help prevent heart disease and stroke.
“A couple of cups a day would probably be a good dose for people,” researcher Charalambos Vlachopoulos said. “This is the first study to show these effects for green tea.”
Prior research has indicated that black tea can improve cardiovascular health, leading researchers suspect that green tea might even more effective. Many of the beneficial health effects of tea are attributed to its high content of antioxidant polyphenols, especially flavonoids. Most of these polyphenols are destroyed, however, by the fermentation process that makes tea black. This is why green tea has a water-extractable polyphenol content of between 30 and 40 percent, while the content in black tea is only 3 to 10 percent.
In the current study, researchers had 14 volunteers drink three different beverages, on three separate occasions: 6 grams of green tea, 125 milligrams of caffeine (the amount found in 6 grams of green tea) and a cup of hot water. They measured the flow-mediated dilation (FMD) of the participants’ blood vessels at 30, 90 and 120 minutes after consumption.
FMD is a widely used measure of blood vessel health.
The participants’ FMD improved by an average of 3.9 percent within 30 minutes of drinking green tea. It did not change at all in those who drank either the caffeine or hot water.
“Green tea is consumed less in the Western world than black tea, but it could be more beneficial because of the way it seems to improve [circulatory] function,” Vlachopoulos said.
He also noted that a number of studies have linked green tea to various cancer-fighting effects.
I just had to share this article with you. It’s important to know these studies have been done.
Written by Jenny Hope
Source – www.dailymail.co.uk
“A cup of green tea a day could help keep your heart healthy, a study shows. The drink was found to widen the artery, which runs from the shoulder to the elbow by 4 per cent within 30 minutes – reducing the risk of blood clots. This is a good indicator of improved blood flow around the body, says a report in the European Journal of Cardiovascular Prevention and Rehabilitation.
Dr Nikolaos Alexopoulos and colleagues at the 1st Cardiology Department, Athens Medical School, used ultrasound scanning to measure the performance of the brachial artery – which runs from the shoulder to the elbow, and is a good indicator of blood flow around the body. A team of healthy volunteers were given green tea, caffeine or hot water to drink on three separate occasions. Measurements of the brachial artery were taken at three stages after they drank their beverage.
The researchers found the artery expanded by four per cent 30 minutes after volunteers drank green tea. Caffeine or hot water had no effect. Dilation of the artery shows better functioning of the endothelium, the layer of cells lining blood arteries that stops clots forming. Previous research suggests black tea improves short and long-term endothelial performance, but this is the first time green tea has been shown to have a short-term beneficial effect on the large arteries.
Green tea is traditionally consumed in China and Japan and differs from black tea in that it is not fermented before drying. This fermentation process appears to reduce the content of flavonoids – beneficial antioxidants – by up to 90 per cent, which is why green tea is believed to offer different health benefits to black tea.
Recent studies have also shown potent anticarcinogenic effects of green tea, attributed to its antioxidant properties. Other research shows drinking green tea lowers ‘bad’ cholesterol and blood pressure, and reduces harmful liver enzymes. Evidence is now suggesting that drinking around 3 to 4 cups of tea a day may help reduce the risk of developing heart disease.”
In conculsion, including green tea in your diet just makes sense. I have written about the “other health benefits” of Wu Yi Tea before, as you may be aware Wu Yi Tea has been shown to be more effective than other green teas. Get more information on Wu Yi Tea
The corporate weight loss industry doesn’t really want you to lose weight. They just want you to buy their chemical pills and potions, over and over again.
Don’t do it.
There is a healthy alternative. A natural, time tested product with proven weight loss and other health benefits. Simple and easy to incorporate into your daily life. Enjoyable to consume and cost effective.
What is it? A secret of Asian women, known to them for hundreds of years – Wu Yi Tea. This secret tea is no ordinary green tea – scientific studies have proved it. It’s being used by Hollywood celebrities who owe their shapely bodies and good health to Wu Yi Tea.
So why not find out how Wu Yi Tea can help you? ClickHERE.
Caffeine is a naturally occurring substance found in the leaves, seeds or fruits of at least 100 different species worldwide and is part of a group of compounds known as methylxanthines. The most commonly known sources of caffeine are coffee, cocoa beans, cola nuts and tea leaves. People have enjoyed caffeinated beverages for many years. Caffeine is also added to specifically formulated ‘energy drinks’ and pharmaceutical products such as cold and flu remedies.
Coffee and tea also contain other dimethylxanthines; theophylline which has similar properties to caffeine and theobromine whose pharmacological actions is far less potent than caffeine and theophylline.
The amount of caffeine present in products depends on the type of the product, the serving size and the preparation method. For example a 190ml cup of tea contains 50mg of caffeine, one third less than the same amount of an instant cup of coffee (75mg). Table 1 below gives an indication of the amount of caffeine found in other drinks compared to tea:
Table 1 – Type of Product Caffeine (mg/ serving)
Tea All types 50mg/ 190ml serving (1)
Coffee Brewed (filter or percolated) 100-115mg/ 190ml serving (1)
Instant 75mg/ 190ml serving 1 Cola drinks Standard and Sugar Free 11-70mg/ 330 ml can (2)
‘Energy’ drinks All types 28-87mg/ 250ml serving (2)
Chocolate Bar 5.5-35.5mg/ 50g bar (2)
On average we consume 3.98mg of caffeine /kg body weight per day ie 239mg/ day for a 60kg person (3).
What is a safe intake of caffeine?
Up to 300mg/day (6 cups of tea) is considered moderate, with no evidence of harmful effects in the vast majority of the adult population. Some individuals are sensitive to caffeine and will feel effects at smaller doses than other individuals who are less sensitive. For this reason, these individuals may need to limit their caffeine intake.
Metabolism and Clearance
Caffeine does not accumulate in the body over a course of time and is normally excreted within several hours of consumption. The rate of caffeine elimination varies between individuals and this maybe as a result of genetic factors affecting the enzymes involved in the metabolism, or due to certain lifestyle factors e.g., smoking.
Children also metabolize caffeine at a quicker rate. Generally caffeine absorption is complete within about one hour after ingestion and the plasma concentration peaks (2) after about 60-90 minutes. The half-life of caffeine in the plasma is about 2.5 – 4.5 hours in healthy adults.
A number of different factors affect individual tolerance to caffeine, including the amount ingested, the frequency of caffeine consumption and individual metabolism. It is widely recognized that gradual tolerance develops with prolonged caffeine use.
Caffeine is a pharmacologically active substance, and depending on the dose, has a number of actions:-
• Central Nervous System Stimulant. A moderate caffeine intake can cause mild stimulation that maybe beneficial in terms of increased alertness, concentration, improved performance and decreased fatigue. (5-10) However, higher intakes may affect sleep, cause nervousness and an irregular heartbeat.
• Weak Bronchodilator. As a result, interest has been shown in its potential role as an asthma treatment. A number of studies have explored the effects of caffeine in asthma and the conclusions from a Cochrane Review suggest that caffeine appears to improve airways function modestly in people with asthma for up to four hours after consumption. (11)
• Diuretic. The diuretic action of caffeine may be due to an increase in renal blood flow, leading to an increased glomerular filtration rate (GFR), or due to a decreased re-absorption of sodium in the renal tubules. The diuretic effect of caffeine is dependent on the amount consumed and duration of intake e.g. the caffeine in tea does not have a diuretic effect unless the amount of tea consumed at one sitting contains more than 250-300mg of caffeine, equivalent to between 5 and 6 cups of tea. (12-17).
In fact, due to the volume of fluid that is drunk whilst enjoying a cup of tea, the British Dietetic Association advises that tea can contribute towards the daily recommended fluid intake of 1.5 to 2 litres.
• Cardiac Muscle Stimulant. Moderate caffeine consumption does not increase cardiac arrhythmias. (18)
If regular caffeine consumption is stopped abruptly, symptoms such as headaches, irritability and fatigue may occur. These effects are usually temporary, disappearing after a day or so and can be avoided if caffeine cessation is gradual.
Caffeine and Health
The role of caffeine in the development of certain diseases and conditions has been the subject of extensive research in recent years.
A number of studies investigating the impact of caffeine in the development of cancer have failed to establish a relationship. (19-22) In fact, tea is one of the richest sources of flavonoids, a powerful group of antioxidants. The role of antioxidants in the prevention of free radical damage has led to suggestions that tea maybe anti-carcinogenic. (23). Despite interesting preliminary research, further work is required to prove its beneficial effect in this area.
• Heart Disease.
The relationship between caffeine and heart disease has been the subject of a number of studies, and results from these and epidemiological studies have led to the conclusion that the ingestion of moderate amounts of caffeine is not associated with any increased risk of heart disease. (24-28) The Committee on Medical Aspects of Food Policy concluded that ‘there is little evidence that caffeine itself has any relation with CHD risk’ in the 1994 Nutritional Aspects of Cardiovascular Disease report. (29)
• Parkinson’s Disease.
Observational studies have suggested that caffeine may play a role in protecting against Parkinson’s disease, (30-31). Further research to try to determine the exact mechanism is required.
• Relief of headaches.
In a study of 301 regular headache sufferers, researchers found that a combination of ibuprofen and caffeine was better than either drug alone in relieving pain. (32)
Although a caffeine ‘pill’ was used in this trial, the researchers believed that caffeinated beverages would work just as well. However, they did warn that chronic headache sufferers should avoid caffeine because it might exacerbate symptoms. More work is required in this field before firm conclusions about caffeine and pain relief can be drawn.
Caffeine crosses the placenta and achieves blood and tissue concentrations in the foetus that are similar to maternal concentrations. For this reason recent advice published by the Food Standards Agency (33) recommends that pregnant women should limit their intake of caffeine consumption to less than 300mg/ day (equivalent to 6 cups of tea/ day). At this level there is little evidence to suggest that the health of the unborn child or mother is affected.
Despite recent publicity about caffeine, the fact remains that the consumption of caffeine at intakes of 300mg/ day has no adverse effects in the vast majority of the adult population. For this reason an average intake of three to four cups of tea (34) a day is well within the level considered safe.
Caffeine and Breastfeeding.
Caffeine enters breast-milk in small amounts (about 1% of the mother’s plasma level) but it does accumulate in smaller babies. Six to eight cups of coffee a day can result in infant wakefulness and hyperactivity. Smoking augments this effect. Of course the dose of caffeine from one cup of tea a day is nothing like the dose from several cups of coffee a day, but it makes sense to keep the dose the baby gets as low as possible.
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