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Green Tea: Health benefits, Nutritional Information and Research

Green Tea: Health benefits, Nutritional Information and Research
  1. Green tea health benefits
  2. Nutritional breakdown of green tea
  3. Types of green tea
  4. Green tea side effects and risks  

Green tea, native to India and China, has been consumed and hailed for its health benefits for hundreds of years worldwide, however has recently gained popularity for Antioxidant and weight loss.


Tea is that the most consumed potable within the world just behind water however, 75% of the tea consumed worldwide is black and balance 25% is Green Tea and other flavoured. All types of tea, except herbal tea, are brewed from the dried leaves of the Camellia sinensis bush.


The level of oxidization of the leaves determines the sort of tea. Green tea is created from unoxidized leaves and is one amongst the less processed kinds of tea. It so contains the foremost antioxidants and helpful polyphenols.

Fast facts on Green Tea

• Camellia sinensis Green Tea leaf has been utilized in ancient Indian and Chinese medication

 

• there are many grades of tea leaf offered, depending on Location, maturity processing.

 

  • Tea leaf either green or black could forestall a variety of ailments even like cancer

 

  • additional analysis is required to prove several of the health claimed.


Green tea health benefits


Listed below are some major potential health edges related to tea.

Green tea was utilized in ancient Chinese and Indian medication to manage injury and heal wounds, aid digestion, improve heart and mental health, and regulate body temperature.

Recent studies have shown tea will probably have positive effects on everything from weight loss to liver disorders, type 2 diabetes, and Alzheimer's disease.
Though it is necessary to notice that additional research is needed to prove these potential health Benefits:

1)     Green tea and cancer prevention

 

According to the National Cancer Institute, the polyphenols in tea are shown to decrease tumor growth in laboratory and animal studies and will defend against injury caused by ultraviolet UVB radiation.

In countries wherever tea consumption is high, cancer rates tend to be lower, however it's not possible to grasp as expected whether or not it's the tea that forestalls cancer in these explicit populations or different manner factors.

Some studies have additionally shown the positive impacts of tea on the subsequent kinds of cancer:

  • breast
  • bladder
  • ovarian
  • colorectal (bowel)
  • esophageal (throat)
  • lung
  • prostate
  • skin
  • stomach

Researchers believe that it's the high level of polyphenols in tea that helps kill cancerous cells and stop them from growing. However, the precise mechanisms by that tea interacts with cancerous cells is unknown.

However, different studies haven't found that tea will scale back cancer risk. The amount of tea needed for cancer-preventive effects additionally varies wide in studies - from 2-10 cups per day.

In 2005, the Food and Drug Administration (FDA) stated, "there is no credible evidence to support qualified health claims for green tea consumption and a reduced risk of gastric, lung, colon/rectal, esophageal, pancreatic, ovarian, and combined cancers."

2) Green tea heart benefits

A 2006 study revealed within the Journal of the yank Medical Association terminated that tea leaf consumption is related to reduced mortality thanks to all causes, as well as disorder.

The study followed over 39,000 Japanese participants between the ages of forty and seventy and nine for eleven years, beginning in 1994.

The participants UN agency drank a minimum of five cups of tea leaf per day had a considerably lower risk of dying (especially from vas disease) than people who drank only one cup of tea per day.

Green tea contains catechins, polyphenolic compounds that are thought to exert various protecting effects, notably on the circulatory system.

3) Green tea and lower cholesterol

An analysis of printed studies in 2011 found that intense tea, either as a nutrient or in capsule type, was coupled to important however modest reductions in total and LDL or "bad" cholesterol.

4) Stroke risk and green tea

Drinking tea leaf or low on a daily basis is related to a reduced risk of stroke, per a study printed within the journal Stroke: Journal of the yank Heart Association.

The lead author of the study, Dr. Yoshihiro Kokubo, Ph.D., said, "This is that the initial large-scale study to look at the combined effects of each tea leaf and low on stroke risks. You may build a little however positive manner amendment to assist lower the chance of stroke by adding daily tea leaf to your diet."

5) Green tea for type 2 diabetes

Studies regarding the link between tea and polygenic disorder are inconsistent. Some have shown a lower risk of developing kind a pair of polygenic disorder for tea drinkers than for those that consumed no tea, whereas different studies have found no association between tea consumption and diabetes at all.

6) Green tea and weight loss

Green tea might promote significant to non-significant weight loss in overweight and corpulent adults; but, since weight loss in the studies was so minimal, it is unlikely that green tea is clinically important for weight loss.

7) Green tea and inflammatory skin diseases

A 2007 study all over that tea may hold promise as a replacement treatment for skin disorders like disease of the skin and dandruff. Researchers studied associate degree animal model for inflammatory skin diseases, usually characterised by patches of dry, red, flaky skin caused by the inflammation and overproduction of skin cells. Those treated with tea showed slower growth of skin cells and therefore the presence of a factor that regulates the cells' life cycles.

8) Working memory and the effects of green tea

Research published in the journal Psychopharmacology suggests that green tea can enhance our brain's cognitive functions, particularly the working memory.

The analysis team aforementioned their findings counsel that tea may be promising within the treatment of psychological feature impairments related to medicine disorders, like dementedness.

9) Green tea and Alzheimer's

In a study printed in 2011, researchers tested the impact of a part of tea, CAGTE (or "colon available" green tea extract), after it had been digested, to see how it affected a key super molecule in Alzheimer's disease.

The Alzheimer's Society commented that "this study adds to previous analysis that implies tea would possibly facilitate to cut back the danger of Alzheimer's disease. However, the researchers used a far higher dose of the active green tea chemical than would ever be found in the human body. More analysis is required to ascertain whether or not tea is protecting at a far lower dose, and to understand the mechanism involved."

Other studies have found that tea could be useful in preventing dental cavities, stress, chronic fatigue, treating skin conditions, and improving arthritis by reducing inflammation.

Further analysis is required to fix up these theories.

Nutritional breakdown of green tea

Unsweetened brewed tea could be a zero calorie potable. The caffeine contained in a very cup of tea will vary in step with the length of infusing time and also the quantity of tea infused. In general, tea contains a comparatively touch of caffeine (approximately 20-45 milligrams per eight ounce cup), compared with tea, that contains regarding fifty milligrams and low with 95 milligrams per cup.

Green tea is considered one of the world's healthiest drinks and contains one of the highest amounts of antioxidants of any tea. Natural chemicals called polyphenols in tea are what are thought to provide its anti-inflammatory and anti-carcinogenic effects. Green tea is approximately 20-45 percent polyphenols by weight, of which 60-80 percent are catechins such as EGCG. Catechins are antioxidants that are said to help prevent cell damage.

Types of green tea

Green tea is available in many types, including:

  • bottled and sweetened with sugar or an artificial sweetener
  • in single tea bags
  • as loose-leaf
  • in instant-powder
  • green tea supplements, which are sold in capsule form or liquid extracts

 

According to 2010 analysis given at the Yankee Chemical Society, bottled teas don't seem to be similar to brewed teas as some sixteen ounce bottled teas will contain fewer polyphenols than one cup of brewed tea.

Green tea side effects and risks

There area unit very little to no renowned facet effects or contraindications to drinking tea leaf for adults. However, the subsequent risks or complications ought to be created clear:

  • Caffeine sensitivity - those with severe caffeine sensitivities could experience insomnia, anxiety, irritability, nausea, or upset stomach.
  • Blood thinners - those taking blood thinners (anticoagulant drugs) such as Coumadin/warfarin should drink green tea with caution due to its vitamin K content. It's also suggested to avoid tea leaf and anodyne, because they both reduce the clotting effectiveness of platelets.
  • Other stimulants - if taken with stimulant drugs, green tea could increase blood pressure and heart rate.

Green tea supplements contain high levels of active substances that may trigger facet effects and act with alternative herbs, supplements, or medications.

Green tea supplements area unit unregulated by the agency and will conjointly contain alternative substances unsafe for health or with unproved health edges. Always consult with a doctor before beginning any herb or supplement plan.

In explicit, pregnant or breastfeeding girls, those with heart issues or high force per unit area, urinary organ or liver issues, abdomen ulcers, or anxiety disorders mustn't take tea supplements or extracts.

Further reading on green tea

Various tea merchandise area unit offered to get online. It is a decent plan to check completely different brands, and differing types of tea, to decide on the foremost appropriate one for you.

Have you enjoyed reading regarding the potential health edges of inexperienced tea? Take a glance at our assortment of articles regarding Why And What Of Yohimbe And Yohimbine ?. Alternatively, browse our article regarding Ashwagandha health benefits and side effects.

Reference :-

January 2011 Issue. Hot & Cold — Despite Tea’s Popularity Worldwide, Research on Its Health Benefits Remains Inconsistent
By Densie Webb, PhD, RD
Today’s Dietitian Vol. 13 No. 1 P. 32

https://www.todaysdietitian.com/newarchives/011211p32.shtml

Green tea intake lowers fasting serum total and LDL cholesterol in adults: a meta-analysis of 14 randomized controlled trials.

https://www.ncbi.nlm.nih.gov/pubmed/21715508

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