How This Helps

Green tea comes from the plant Camellia sinensis. It can be made to green, white, black, oolong, or pu erh tea. Green tea includes a high number of antioxidant polyphenols called catechins that may be used to fight the negative effects free radicals cause in the human body. An amino acid found almost exclusively in green tea, also called L-theanine can pass the blood brain barrier and interact with the brain directly. Green tea (and other teas) also contains caffeine, which has a stimulating effect on the CNS and also provides some medicinal activities towards the cardiovascular system. It may be the healthiest drink available.

What is green tea good for?

Green tea is loaded with antioxidants and nutrients that have beneficial effects on the body. These benefits include improved heart & brain function, lowering of cholesterol & fat, skin care, a lower risk of cancer, and many other impressive benefits.

1. Green tea and heart health

Tea has shown promising advantages in association to heart health. Flavonoids in green tea can help prevent oxidation of LDL (bad) cholesterol and decrease blood clotting. Studies show green tea may also help lower blood pressure, triglycerides, and total and LDL cholesterol. A 2006 JAMA study concluded that green tea consumption is associated with reduced death rates due to all causes, including heart disease. The study followed over 40,000 Japanese participants for 11 years and found that the participants who drank at least 5 cups of green tea daily had a significantly lower chance of dying (particularly from cardiovascular disease) than those who drank less than one cup of tea daily.

 

2. Green tea and reduced cholesterol

An analysis of published studies in 2011 discovered that consuming green tea, possibly as a drink or in capsule form, was connected to significant but small reductions in total and LDL or "bad" cholesterol.

 

3. Green tea and cancer care

Besides cardiovascular wellness, tea extracts and Polyphenols also have shown promising effects in cancer research. Tea and tea elements have been demonstrated to inhibit carcinogen-induced DNA damage in several of cell studies, in addition to inhibit tumor growth at different organ websites.

Studies on the effects of green tea in cancer prevention have shown to have a potential effect on liver, breast, prostate, and colorectal cancers. These studies suggested the more cups of green tea consumed daily over several years continues to decrease one's chance of those cancers. According to the National Cancer Institute, the polyphenols in tea have been shown to reduce tumor development in lab and animal studies and might protect against damage caused by ultraviolet UVB radiation.

In countries where green tea consumption is high, cancer occurrences tend to be reduced, but it's not possible to know for certain whether it's the green tea which prevents cancer in these populations or other lifestyle variables. Researchers believe that it is the high level of polyphenols in tea that will help kill cancerous cells and prevent them from growing. However, the specific mechanism by which tea interacts with cancerous cells is unknown. Other studies haven't found that tea can decrease cancer risk.

 

4. Green tea for skin

Green tea has also proven to be anti inflammatory, which can help keep your skin clear and glowing. One study demonstrated applying green tea can even alleviate skin conditions like acne and rosecea. The existence of polyphenols in green tea has also proven to be a miracle for your own skin, as they could shield against harmful UV rays, which can be connected to wrinkles, skin cancers, and dark spots.

 

5. Green tea for Acne

Green tea is rich in catechins, which are antimicrobial and help destroy bacteria that are senile. Additionally, it has anti-inflammatory properties that help reduce the inflammation and redness that's often brought on by acne. When consumed, the tea also can help treat hormonal imbalances which can often cause acne. Green tea is loaded with antioxidants which help neutralize damage-causing free radicals, protecting your skin tissues and keeping them healthy. The antioxidants in green tea also help heal scars and marks which are often left behind from acne. Large pores bring dirt and grease, resulting in the formation of a acne or pimple. Green tea acts as an efficient toner that unclogs and refines your pores.

The tea also helps soothe your face, reduces redness, and treats existing acne. The EGCG catechin in green tea helps get rid of acne if you consume green tea on a regular basis.

 

6. Green tea for weight loss

Green tea can promote a little, non-significant weight reduction in overweight and obese adults, because weight loss in the research was so minimal, it's unlikely that green tea is clinically significant for weight loss. Evidence supporting tea as a weight-loss aid is based mainly on studies analyzing the effects of teas extracts, such as catechins and caffeine, so results might not be directly related to brewed tea. However, research indicates green tea catechins and caffeine can stimulate thermogenesis, resulting in a possible increase in energy expenditure.

Several studies have shown implications of green tea consumption on reducing abdominal fat and waist circumference in somewhat overweight participants. But while green tea has shown to assist in weight loss, it shouldn't be viewed as a cure-all, since it only creates a small impact, and is less significant than eating a wholesome diet or engaging in daily exercise.


7. Green tea and Stroke 

Drinking green tea or coffee on a regular basis is correlated with a reduced risk of stroke, according to a study published in the journal Stroke: Journal of the American Heart Association. The lead author of the study, Dr. Yoshihiro Kokubo, Ph.D analyzed the combined effects of the green tea and coffee on stroke risks. A modest but positive lifestyle change to reduce the risk of stroke could happen with the addition of daily green tea to your diet.

 

8. Green tea for type 2 diabetes

Studies have not been able to definitively demonstrate the benefit of green tea for diabetes. Some studies have shown a lower risk of developing type 2 diabetes for green tea drinkers, compared to those who consumed no tea. Other studies have found no association between tea consumption and diabetes in any respect. The jury is still out on this one.

 

9. Green tea and inflammatory skin diseases

A 2007 study concluded that green tea could hold promise as a new treatment for skin ailments like psoriasis and dandruff. Researchers studied an animal model for inflammatory skin diseases, frequently characterized by patches of dry, red, flaky skin caused by the inflammation and overproduction of skin cells. Those treated with green tea showed slower growth of skin cells and the existence of a gene that regulates the cells' life cycles.

 

10. Effects of green tea on working memory

Research published in the journal Psychopharmacology indicates that green tea can boost our brain's cognitive functions, especially the working memory. The study team said their findings suggest that green tea could be promising in treating cognitive impairments such as dementia.

Side Effects

Green tea in high-doses can possibly cause side effects due to the caffeine. These side effects may range from moderate to severe and include headache, anxiety, sleep issues, vomiting, nausea, irritability, irregular heartbeat, tremor, heartburn, nausea, ringing in the ears, convulsions, and confusion. Green tea also appears to decrease the absorption of iron from meals. 

Summary

The popularity of green tea is mainly because of the high amounts of antioxidants and nutrients it contains. Studies show that green tea drinkers are likely to live longer healthier than non-green tea drinkers. In order to live healthier, look good, lose weight and lower your risk of chronic diseases, consider making a moderate amount of green tea a part of your life.

References

1. Green tea (2017, January 11), http://www.nutrition411.com/patient-education-materials/herbal-fact-sheets/item/364-green-tea/

2. Green tea. (n.d.). University of Maryland Medical Center, umm.edu/health/medical/altmed/herb/green-tea

3. Kokubo, Y., Iso, H., Saito, I., Yamagishi, K., Yatsuya, H., & Ishihara, J. (2013). The impact of green tea and coffee consumption on the reduced risk of stroke incidence in Japanese population. Stroke: Journal of the American Heart Association, 44(5), 1369-1374.

dx.doi.org/10.1161/strokeaha.111.677500

4. Peterson J, Dwyer J, Bhagwat S, et al. Major flavonoids in dry tea. J Food Comp Anal. 2005;18(6):487-501.

5. Khalesi S, Sun J, Buys N, Jamshidi A, Nikbakht-Nasrabadi E, Khosravi-Boroujeni H. Green tea catechins and blood pressure: a systematic review and meta-analysis of randomised controlled trials. Eur J Nutr. 2014;53(6):1299-1311.

6. Schmidt, A., Hammann, F., Wölnerhanssen, B., Meyer-Gerspach, A., Drewe, J., Beglinger, C., ... Borgwardt, S. (2014). Green tea extract enhances parieto-frontal connectivity during working memory processing. Psychopharmacology, 231(19), 3879-3888.

link.springer.com/article/10.1007%2Fs00213-014-3526-1

7. UK scientists show super foods proven to beat prostate cancer. (2013, June 3)

cuh.org.uk/cms/news/cancer-services/uk-scientists-show-super-foods-proven-beat-prostate-cancer

8. Webb, D. (2011, January) Hot & cold - despite tea's popularity worldwide, research on its health benefits remains inconsistent. Today's Dietitian, Vol. 13 No. 1 P. 32 todaysdietitian.com/newarchives/011211p32.shtml

9. Peterson J, Dwyer J, Bhagwat S, et al. Major flavonoids in dry tea. J Food Comp Anal. 2005;18(6):487-501.

10. Khalesi S, Sun J, Buys N, Jamshidi A, Nikbakht-Nasrabadi E, Khosravi-Boroujeni H. Green tea catechins and blood pressure: a systematic review and meta-analysis of randomised controlled trials. Eur J Nutr. 2014;53(6):1299-1311.

11. Yang CS, Lambert JD, Sang S. Antioxidative and anti-carcinogenic activities of tea polyphenols. Arch Toxicol. 2009;83(1):11-21.

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