Medically CitedIn This Article
Green Tea Extract Overview
Green tea extract is made from green tea leaves. Green tea cakes, in particular, are quite simple to make. People are becoming increasingly aware of the numerous health benefits it provides. Green tea comes in four varieties: sweet peeled, dried peeled, partially refined, and rustic peeled.
Green tea originated in China and is now widely drunk throughout Asia and the Caribbean. [1] Camellia sinensis is a prolific flowering plant. [2]
Green Tea Leaf
Health Benefits of Green Tea Extract
1. It contains bioactive substances that are beneficial.
Green tea is more than just a revitalizing drink. The green tea plant has a variety of beneficial substances that make their way into the finished beverage.
Polyphenols, which are natural compounds with health advantages such as lowering inflammation and preventing cancer, are abundant in green tea. By lowering the production of free radicals in the body, these substances help protect cells and molecules from damage. Free radicals play a role in aging and a number of diseases. [3]
Green tea is high in polyphenol antioxidants, such as EGCG (Epigallocatechin gallate). These antioxidants may provide a variety of health benefits. [4]
2. It has the potential to boost brain function.
Green tea can help you stay alert while also improving your brain function. The principal active ingredient is caffeine, a well-known stimulant.
Caffeine has been found to increase multiple areas of brain function, including mood, vigilance, response time, and memory, in numerous studies.
Green tea has lower caffeine content than coffee, yet it still has enough to have an effect. It also contains the amino acid L-theanine, which, when paired with coffee, can improve brain function. [5]
3. Promotes fat-burning
Green tea is virtually always present in the ingredients list of any fat-burning supplement.
This is because studies have shown that green tea increases fat burning and metabolic rate.
Green tea may increase metabolic rate and fat burning in the short term, albeit not all research agree.
4. The antioxidant content may help to reduce the incidence of certain malignancies.
Cancer is a disease that results from uncontrolled cell growth. It is one among the world’s leading causes of death. It is a great source of antioxidants in green tea, which have been associated with a lower risk of cancer, including breast cancer, prostate cancer, and colorectal cancer. [6]
Green tea contains potent antioxidants that may help to prevent cancer. Green tea consumers have a lower risk of many types of cancer, according to multiple studies.
5. It has the potential to preserve the brain from aging.
Green tea has been shown to increase brain function in the near term as well as guard the brain as it ages.
Green tea’s bioactive components may have a variation of brain-protective properties. They have the potential to reduce the risk of dementia, a common neurological condition that affects the elderly. [7]
6. It has the potential to reduce foul breath.
Green tea catechins are also good for your teeth. Green tea catechins may suppress bacterial growth in the mouth, lowering the risk of bad breath. [8]
7. It’s possible that it will assist you in losing weight.
Green tea’s ability to temporarily raise metabolic rate suggests that it could help with weight loss. It has been shown in several trials to aid in the reduction of body fat, particularly in the stomach area. Green tea has been linked to weight loss in several studies. It may be especially beneficial for lowering harmful abdominal fat. [9]
8. It’s feasible to prevent type 2 diabetes.
High blood sugar levels are a symptom of type 2 diabetes, which can be caused by insulin resistance or an inability to make insulin.
In research, green tea has been proven to increase insulin sensitivity and blood sugar levels. Green tea has been demonstrated to lower blood sugar levels in some controlled investigations. It may also assist to minimize the risk of type 2 diabetes developing. [10]
9. It is possible that it will aid in the prevention of cardiovascular disease.
The major causes of death worldwide are cardiovascular disorders, such as heart disease and stroke. [11]
Green tea has been shown in studies to improve several of the primary risk factors for these diseases, such as total cholesterol and LDL (bad) cholesterol levels.
10. It can possibly help you live longer.
Green tea contains several components that may help defend against cancer and heart. Green tea drinkers have been shown to live longer than those who do not. [12]
The nutritional content of green tea components demonstrates tremendous health benefit for heart and vascular system, fight cancer, suppress pathogens, healthy for skin, hair, and bone, regulate metabolism, and more, according to our review.
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Green Tea Extract FAQ’s
Q: What is green tea extract?
A: It’s a decaffeinated polyphenol mixture derived from Camellia sinensis, a plant having its root in Asia, with antioxidant, antiviral and potential chemo preventive activities. [13]
Q: What does green tea extract do?
A: Green tea extract has been found in numerous trials to help with weight loss, blood sugar regulation, disease prevention, and workout recovery. It can also aid in the maintenance of healthy skin and liver, as well as the reduction of blood fat levels, blood pressure regulation, and brain health. It can be taken as a capsule, a liquid, or a powder. [14]
Q: Is green tea extract a diuretic?
A: When coupled with hydrochlorothiazide, the green tea extract considerably boosted diuretic action, according to the findings. The new study’s key conclusion is that, while the combination expands the range of diuretics available, it also lowers urine potassium damage. [15]
Q: How many mg of green tea extract should I take?
A: Toxicological and human safety data for tea preparations consumed as a solid bolus dosage yielded a safe intake threshold of 338 mg EGCG/day for adults. Based on human AE data, an Observed Safe Level (OSL) of 704 mg EGCG/day could be suggested for tea preparations in drinking form. [16]
Q: Does green tea extract raise blood pressure?
A: Drinking green tea was linked to lower systolic blood pressure and total and LDL cholesterol, according to a meta-analysis. There were no significant impacts on diastolic blood pressure, HDL cholesterol, or triglycerides. [17]
17 Sources
We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. This ensures the highest standard of scientific accuracy.
[1] Green tea: https://www.mountsinai.org/health-library/herb/green-tea[2] Hodgson AB, Randell RK, Jeukendrup AE. The effect of green tea extract on fat oxidation at rest and during exercise: evidence of efficacy and proposed mechanisms. Adv Nutr. 2013;4(2):129-140. Published 2013 Mar 1. doi:10.3945/an.112.003269
[3] Chacko SM, Thambi PT, Kuttan R, Nishigaki I. Beneficial effects of green tea: a literature review. Chin Med. 2010;5:13. Published 2010 Apr 6. doi:10.1186/1749-8546-5-13
[4] Katiyar SK, Elmets CA. Green tea polyphenolic antioxidants and skin photoprotection (Review). Int J Oncol. 2001 Jun;18(6):1307-13. doi: 10.3892/ijo.18.6.1307. PMID: 11351267.
[5] Park SK, Jung IC, Lee WK, Lee YS, Park HK, Go HJ, Kim K, Lim NK, Hong JT, Ly SY, Rho SS. A combination of green tea extract and l-theanine improves memory and attention in subjects with mild cognitive impairment: a double-blind placebo-controlled study. J Med Food. 2011 Apr;14(4):334-43. doi: 10.1089/jmf.2009.1374. Epub 2011 Feb 8. PMID: 21303262.
[6] Filippini T, Malavolti M, Borrelli F, et al. Green tea (Camellia sinensis) for the prevention of cancer. Cochrane Database Syst Rev. 2020;3(3):CD005004. Published 2020 Mar 2. doi:10.1002/14651858.CD005004.pub3
[7] Chen SQ, Wang ZS, Ma YX, et al. Neuroprotective Effects and Mechanisms of Tea Bioactive Components in Neurodegenerative Diseases. Molecules. 2018;23(3):512. Published 2018 Feb 25. doi:10.3390/molecules23030512
[8] Chatterjee A, Saluja M, Agarwal G, Alam M. Green tea: A boon for periodontal and general health. J Indian Soc Periodontol. 2012;16(2):161-167. doi:10.4103/0972-124X.99256
[9] Does green tea help weight loss?: https://www.medicalnewstoday.com/articles/320540#:~:text=Green%20tea%20contains%20caffeine%20and,of%20energy%20the%20body%20uses.
[10] Can Green Tea Help Lower Blood Sugar? New Study: https://www.aicr.org/resources/blog/can-green-tea-help-lower-blood-sugar-new-study/
[11] Samavat H, Newman AR, Wang R, Yuan JM, Wu AH, Kurzer MS. Effects of green tea catechin extract on serum lipids in postmenopausal women: a randomized, placebo-controlled clinical trial. Am J Clin Nutr. 2016;104(6):1671-1682. doi:10.3945/ajcn.116.137075
[12] Tea drinkers live longer : https://www.escardio.org/The-ESC/Press-Office/Press-releases/Tea-drinkers-live-longer
[13] green tea extract: https://www.cancer.gov/publications/dictionaries/cancer-drug/def/green-tea-extract
[14] Venables MC, Hulston CJ, Cox HR, Jeukendrup AE. Green tea extract ingestion, fat oxidation, and glucose tolerance in healthy humans. Am J Clin Nutr. 2008 Mar;87(3):778-84. doi: 10.1093/ajcn/87.3.778. PMID: 18326618.
[15] Chakraborty M, Kamath JV, Bhattacharjee A. Potential Interaction of Green Tea Extract with Hydrochlorothiazide on Diuretic Activity in Rats. Int Sch Res Notices. 2014;2014:273908. Published 2014 Nov 5. doi:10.1155/2014/273908
[16] Hu J, Webster D, Cao J, Shao A. The safety of green tea and green tea extract consumption in adults - Results of a systematic review. Regul Toxicol Pharmacol. 2018 Jun;95:412-433. doi: 10.1016/j.yrtph.2018.03.019. Epub 2018 Mar 24. PMID: 29580974.
[17] Green tea and blood pressure effects: https://www.cebm.ox.ac.uk/research/projects/green-tea-and-blood-pressure-effects
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