Compounds in green tea increase levels of hormones that tell fat cells to break down fat. This releases fat into the bloodstream and makes it available as energy.

If you look at the label of almost every commercial weight loss and fat-burning supplement , you will likely see green tea listed as an ingredient. This is because green tea extract has been repeatedly linked to increased fat burning, especially during exercise.

The study suggests that green tea can boost the fat-burning effects of exercise 8. An eight-week study determined that tea catechins increased fat burning, both during exercise and rest 9. Several other studies confirm these findings, indicating that EGCG boosts the burning of fat — which may lead to reduced body fat in the long term 10 , A number of studies show that green tea extract can boost fat burning.

The effect is even stronger during exercise. Several studies suggest that taking green tea extract or EGCG supplements can make you burn more calories — even at rest. Although most of these studies were very short in duration, some evidence suggests that the metabolism-boosting effect persists in the long term 15 , In one study in 60 obese individuals, those taking green tea extract lost 7.

However, not all studies show that green tea extract boosts metabolism. The effect may depend on the individual This would theoretically make you consume fewer calories automatically — and without any effort. However, studies produced conflicting results on the effects of green tea on appetite Some animal studies suggest that green tea extracts or EGCG supplements can reduce the amount of fat you absorb from foods, but this has not been confirmed in humans 20 , 21 , There is currently no evidence that green tea makes people eat fewer calories.

Some studies in animals suggest that it may reduce the absorption of fat from the diet, but human studies have not confirmed this.

Although many studies show that people do in fact lose weight , there are also some studies showing no effect. Two reviews of many controlled trials on green tea supplements found that people lost about 3 pounds 1. Subcutaneous fat lodges under your skin, but you may also have significant amounts of visceral fat, also called belly fat.

High amounts of visceral fat are associated with inflammation and insulin resistance, both of which are strongly linked to several serious diseases, including type 2 diabetes and heart disease. Several studies on green tea catechins show that although the weight loss effects are modest, a significant percentage of fat lost is harmful visceral fat 25 , 26 , Therefore, green tea should reduce your risk of many major diseases down the line, which may lead to a longer and healthier life.

Green tea extract or catechin supplements may help you lose visceral fat — a fat that is particularly harmful to your health. Even though green tea extract or EGCG supplements can cause a modest increase in metabolic rate and fat burning, its effects are modest when it comes to actual pounds lost.

However, every little bit adds up, and it may work even better when combined with other effective weight loss strategies like eating more protein and cutting carbs.

It is also healthy for various other reasons. Keep in mind that most studies have examined green tea extracts or supplements containing isolated green tea antioxidants. In comparison, the effects of drinking green tea are probably minimal, although regular intake may have long-term benefits.

Our experts continually monitor the health and wellness space, and we update our articles when new information becomes available. Green tea is packed with health-promoting compounds, but many wonder how many cups you have to drink to reap their benefits. This article determines…. Matcha is a type of powdered green tea.

It is very high in antioxidants and has numerous health benefits for your body and brain. Green tea extract is a concentrated supplemental form of green tea.

Here are 10 science-based benefits of green tea extract. Herbal teas have a wide variety of tastes, flavors and even health benefits. Here are 10 healthy herbal teas you'll want to try today.

Rooibos tea is gaining popularity around the world. It is also called red tea. This article explains everything about rooibos tea and its health…. Matcha comes from the same plant as green tea, but it contains more antioxidants and caffeine.

Here are 7 possible health benefits of matcha tea…. Green tea is an incredibly healthy beverage, though some worry about its caffeine content.

This article examines how much caffeine is in green tea. Tea contains several stimulant substances: caffeine, theobromine, theophylline, and L-theanine.

Patients with diabetes who used GLP-1 drugs, including tirzepatide, semaglutide, dulaglutide, and exenatide had a decreased chance of being diagnosed…. And concentrated green tea extracts contain catechins at much higher levels than are found in the brewed version of the popular drink.

While green tea is often regarded as good for you, U. gastroenterologist Dr. Herbert Bonkovsky says green tea extract can be dangerous for some people at high doses. In a summary of its safety review findings issued on Wednesday, Health Canada said that although they are rare, "cases of liver injury continue to be reported in Canada and worldwide.

It said it knew of 11 cases of suspected liver injury associated with green tea extract in Canada between and , although only two of those cases "had enough information to be fully assessed.

What remains unclear from the evidence, Health Canada said in an accompanying news release,"is why some people may be more susceptible than others to liver injury.

Health Canada is now asking, "as a precautionary measure," that companies licensed to make "natural health products containing green tea extract as a medicinal ingredient and that are intended for children and adolescents" either remove the green tea extract or revise the label to specify that the product is only intended for adults over 18 years of age.

Julie Papineau, Madeline Papineau's mother, said she is pleased with the stronger warning on green tea extract products but feels it doesn't go far enough.

The department says that green tea "in any form, including as beverages, foods and an extract in natural health products, is considered generally safe for the majority of consumers.

Joyce Boudreau-Hearn, of Mulgrave, N. Her daughter, Jocelyn Stewart, says the year-old had been healthy before she started taking a green tea extract sold as a weight-loss supplement.

You think you will lose a few pounds. She lost her life. While there are documented cases of the dangers, there are few examples of green tea extract actually aiding in long-term weight loss.

Sean Wharton, the medical director of several publicly funded weight-loss clinics in the Greater Toronto Area, describes weight-loss supplements as "hope in a bottle. David Common covers a wide range of stories for CBC News, from war to disrupting scams.

He is a host with the investigative consumer affairs program Marketplace, and a correspondent with The National. David has travelled to more than 85 countries for his work, has lived in cities across Canada, and been based as a foreign correspondent in the U.

and Europe.

And both are well below the average amount of caffeine in an 8oz cup of coffee — 96mg. But, despite not being the smallest pill, the capsules from Zenwise are still easy to swallow and completely flavorless. Ordering from Zenwise is as easy as ordering from your typical online store. Orders to the continental United States always have free standard shipping and arrive in business days.

This might look like a full refund, a partial refund, or a different product shipped to you at no cost, depending on what fits your needs. Additionally, the company makes it easy to find the total catechin content unlike Zenwise and the total caffeine content unlike Vitacost.

We wish Zhou Nutrition and other competitors were as thorough in its safety transparency as PureBulk, which offers multiple easily-accessible safety documents for consumers on request. The standardized version is comparable in dosage to Zhou Nutrition, while the decaf variety is pretty close to that of Zenwise.

Interestingly, the standardized version has a smaller capsule than the decaf. Vitacost products can be found on multiple online storefronts Amazon, Walmart, and so on and in many brick-and-mortar stores. The autoship can be adjusted to send you a bottle every 15, 30, 45, 60, 90, or days. In terms of refunds, Vitacost like Zhou offers a day policy length.

PureBulk offers a nice variety of options for purchasing several hundred servings of green tea extract at reasonable prices. If you take only one mg serving a day, then this bulk purchase would last you about years. This massive amount of green tea extract is likely better suited for families who all take the supplement or even businesses, like a café that adds it to drinks.

This could definitely be a turnoff for some people looking to quickly add green tea extract to their day, but luckily the capsule options exist. If you do go for the powdered option, be warned that it is extremely bitter — emphasis on extremely. Our testers came to the conclusion that any unsweetened beverage is likely not the best option for taking powdered green tea extract.

However, this strong bitterness is what indicates that the product is truly full of polyphenols. Here you can request six different documents:. On the COA Request page, PureBulk notes that, due to a high volume of requests, it may take up to 48 hours for your request to be fulfilled.

However, we asked for all six available documents and received them within eight hours. The picture below is just a small snippet of the information PureBulk sent to us. Those prices are broken down in the small chart below. If you want to return your purchase to PureBulk, only an unopened product sent back within 90 days will get you a full refund.

This policy pales in comparison to our top choice Zenwise, which has no time limit and offers whatever fits your needs refund, new product, and so on.

Not inherently. They often have less caffeine than the equivalent amount of brewed tea, so green tea extract might be a better bet for you if you're sensitive to caffeine. All kinds of tea are healthy in different ways, but green tea has more polyphenols than black tea. This oxidation process ferments the tea, which causes it to lose some of those natural catechins and other polyphenols.

But while it might have fewer chemical antioxidant compounds, black and oolong tea can still help support healthy weight management, heart health, and a clear mind. It also has more caffeine — green tea has an average of 30mg of caffeine per cup, but black tea averages closer to 60mg per cup. EGCG is a type of catechin, and catechins are a type of polyphenol.

Often, green tea extract is orange. This is because some companies extract the polyphenols from the leaves themselves rather than just grinding up the green tea leaves, leaving behind an orange tint. Innerbody uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles.

Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Heiss, M. The Story of Tea: A Cultural History and Drinking Guide.

Ten Speed Press. Lu, H. Earliest tea as evidence for one branch of the Silk Road across the Tibetan Plateau. Scientific Reports, 6 , National Center for Complementary and Integrative Health. Green tea. Chacko, S. Beneficial effects of green tea: a literature review.

Chinese Medicine, 5 , Khan, N. Tea and Health: Studies in Humans. Current Pharmaceutical Design, 19 34 , Miyoshi, N. Applications of a Standardized Green Tea Catechin Preparation for Viral Warts and Human Papilloma Virus-Related and Unrelated Cancers.

Molecules Basel, Switzerland , 25 11 , National Cancer Institute. Dias, T. Nutritional Factors and Male Reproduction. Encyclopedia of Reproduction Second Edition , Kokubo, Y. The impact of green tea and coffee consumption on the reduced risk of stroke incidence in Japanese population: the Japan public health center-based study cohort.

Stroke, 44 5 , — Kuriyama, S. Green tea consumption and mortality due to cardiovascular disease, cancer, and all causes in Japan: the Ohsaki study.

JAMA, 10 , — Questions and Answers on Dietary Supplements. Facts About the Current Good Manufacturing Practices CGMP FDA. Du, G. Epigallocatechin Gallate EGCG is the most effective cancer chemopreventive polyphenol in green tea.

Nutrients, 4 11 , — Friedman, M. Stability of Green Tea Catechins in Commercial Tea Leaves during Storage for 6 Months. Journal of Food Science, 74 2 , HH Lantano, C. Effects of alternative steeping methods on composition, antioxidant property and colour of green, black and oolong tea infusions.

Journal of Food Science and Technology, 52 12 , Chen, Z. Degradation of green tea catechins in tea drinks. Journal of Agricultural and Food Chemistry, 49 1 , — Wang, R.

Reaction kinetics of degradation and epimerization of epigallocatechin gallate EGCG in aqueous system over a wide temperature range. Journal of Agricultural and Food Chemistry, 56 8 , — Neilson, A.

Catechin degradation with concurrent formation of homo- and heterocatechin dimers during in vitro digestion. Journal of Agricultural and Food Chemistry, 55 22 , — Green, R. Common tea formulations modulate in vitro digestive recovery of green tea catechins.

Furniturewalla, A. Approaches to overcome bioavailability inconsistencies of epigallocatechin gallate, a powerful anti-oxidant in green tea. Food Chemistry Advances, 1 , Kim, H.

New insights into the mechanisms of polyphenols beyond antioxidant properties; lessons from the green tea polyphenol, epigallocatechin 3-gallate.

Redox Biology, 2 , — Is Green Tea Extract Beneficial? Cleveland Clinic. Perva-Uzunalić, A. Extraction of active ingredients from green tea Camellia sinensis : Extraction efficiency of major catechins and caffeine. Food Chemistry, 96 4 , Department of Agriculture. Beverages, tea, green, brewed, regular.

FoodData Central. Williams, J. The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review. Plant Foods for Human Nutrition Dordrecht, Netherlands , 75 1 , 12— Pandey, K. Plant polyphenols as dietary antioxidants in human health and disease.

Oxidative Medicine and Cellular Longevity, 2 5 , Musial, C. Beneficial Properties of Green Tea Catechins. International Journal of Molecular Sciences, 21 5.

Panche, A. Flavonoids: An overview. Journal of Nutritional Science, 5. Zanwar, A. Antioxidant Role of Catechin in Health and Disease. Polyphenols in Human Health and Disease , Bae, J.

Activity of catechins and their applications. Biomedical Dermatology, 4 , 8. Fan, Y. Catechins and Their Therapeutic Benefits to Inflammatory Bowel Disease. Molecules: A Journal of Synthetic Chemistry and Natural Product Chemistry, 22 3.

Reygaert, W. Green Tea Catechins: Their Use in Treating and Preventing Infectious Diseases. BioMed Research International, Park, J. Therapeutic Potential of EGCG, a Green Tea Polyphenol, for Treatment of Coronavirus Diseases.

Life, 11 3. Singh, B. Green tea catechin, epigallocatechingallate EGCG : Mechanisms, perspectives and clinical applications. Biochemical Pharmacology, 82 12 , Momose, Y.

Systematic review of green tea epigallocatechin gallate in reducing low-density lipoprotein cholesterol levels of humans. International Journal of Food Sciences and Nutrition, 67 6 , — Lee, S. Effects of epigallocatechingallate on thermogenesis and mitochondrial biogenesis in brown adipose tissues of diet-induced obese mice.

Fujiki, H. Primary Cancer Prevention by Green Tea, and Tertiary Cancer Prevention by the Combination of Green Tea Catechins and Anticancer Compounds. Journal of Cancer Prevention, 20 1 , The Relation between Green Tea Consumption and Cardiovascular Disease as Evidenced by Epidemiological Studies.

The Journal of Nutrition, 8 , SS. Liu, W. Effects of tea consumption on metabolic syndrome: A systematic review and meta-analysis of randomized clinical trials. Phytotherapy Research, 34 11 , Patel, S. and Lee, L.

Inhibition of Herpes Simplex Virus-1 by the Modified Green Tea Polyphenol EGCG-Stearate. Advances in Bioscience and Biotechnology, 9 , Kowalska, J. Influence of Tea Brewing Parameters on the Antioxidant Potential of Infusions and Extracts Depending on the Degree of Processing of the Leaves of Camellia sinensis.

Molecules, 26 Hu, J. The safety of green tea and green tea extract consumption in adults — Results of a systematic review. Regulatory Toxicology and Pharmacology, 95 , Cappelli, F. Epigallocatechingallate tolerability and impact on survival in a cohort of patients with transthyretin-related cardiac amyloidosis.

A single-center retrospective study. Internal and Emergency Medicine, 13 6 , — Soares, S. Different phenolic compounds activate distinct human bitter taste receptors.

Journal of Agricultural and Food Chemistry, 61 7 , — National Institute of Diabetes and Digestive and Kidney Diseases. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. Younes, M. Wright, M. Scientific opinion on the safety of green tea catechins. EFSA Journal, 16 4 , e Mayo Clinic.

Caffeine content for coffee, tea, soda and more. Mayo Foundation for Medical Education and Research MFMER. Human Bitter Taste Receptors Are Activated by Different Classes of Polyphenols.

Journal of Agricultural and Food Chemistry, 66 33 , — No spam! Your privacy is important to us. Copyright © Innerbody Research - All Rights Reserved. Innerbody Research does not provide medical advice, diagnosis, or treatment.

You must consult your own medical professional. Online Pharmacies. Hims Review. In comparison, the effects of drinking green tea are probably minimal, although regular intake may have long-term benefits. Our experts continually monitor the health and wellness space, and we update our articles when new information becomes available.

Green tea is packed with health-promoting compounds, but many wonder how many cups you have to drink to reap their benefits. This article determines…. Matcha is a type of powdered green tea.

It is very high in antioxidants and has numerous health benefits for your body and brain. Green tea extract is a concentrated supplemental form of green tea.

Here are 10 science-based benefits of green tea extract. Herbal teas have a wide variety of tastes, flavors and even health benefits. Here are 10 healthy herbal teas you'll want to try today. Rooibos tea is gaining popularity around the world.

It is also called red tea. This article explains everything about rooibos tea and its health…. Matcha comes from the same plant as green tea, but it contains more antioxidants and caffeine. Here are 7 possible health benefits of matcha tea….

Green tea is an incredibly healthy beverage, though some worry about its caffeine content. This article examines how much caffeine is in green tea. Tea contains several stimulant substances: caffeine, theobromine, theophylline, and L-theanine.

Patients with diabetes who used GLP-1 drugs, including tirzepatide, semaglutide, dulaglutide, and exenatide had a decreased chance of being diagnosed…. Some studies suggest vaping may help manage your weight, but others show mixed…. A Quiz for Teens Are You a Workaholic?

How Well Do You Sleep? Health Conditions Discover Plan Connect. Nutrition Evidence Based How Green Tea Can Help You Lose Weight. By Kris Gunnars, BSc on May 12, Fat Loss How It Works Burning Fat Metabolism Calorie Restriction Belly Fat Bottom Line Green tea contains bioactive substances like caffeine and EGCG, which can help boost your metabolism and break down fat cells.

Share on Pinterest. Contains Substances That Can Help You Lose Fat. Can Mobilize Fat From Fat Cells. Increases Fat Burning, Especially During Exercise.

Boosts Your Metabolic Rate. Can It Automatically Make You Consume Fewer Calories? Green Tea Can Help You Lose Fat, Especially Harmful Abdominal Fat. The Bottom Line. How we reviewed this article: History.

May 12, Written By Kris Gunnars. Share this article. Read this next. How Much Green Tea Should You Drink Per Day? This article determines… READ MORE. Matcha — Even More Powerful Than Regular Green Tea? By Adda Bjarnadottir, MS, RDN Ice. By Arlene Semeco, MS, RD and Alyssa Northrop, MPH, RD, LMT.

By Taylor Jones, RD and Rachael Ajmera, MS, RD. By Mary Jane Brown, PhD, RD UK. By Rachael Ajmera, MS, RD. How Much Caffeine Is in Green Tea? By Kris Gunnars, BSc. GLP-1 Drugs Like Ozempic and Mounjaro Linked to Lower Risk of Depression Patients with diabetes who used GLP-1 drugs, including tirzepatide, semaglutide, dulaglutide, and exenatide had a decreased chance of being diagnosed… READ MORE.

If this sounds like a good choice for your lifestyle and health goals, our guide breaks down the research, pros, cons, and details surrounding our top five choices.

Zenwise Green Tea Extract provides high amounts of potentially health-boosting polyphenols at a reasonable price. Each vegan capsule contains less caffeine than a cup of green tea, with much more EGCG. All orders are covered by an unlimited lifetime guarantee. Over the past two decades, Innerbody Research has been dedicated to empowering tens of millions of readers, supporting them in making well-informed decisions about maintaining their well-being and embracing healthier lifestyles.

Our approach involves comprehensive testing of each product or service we review, focusing on quality, the latest medical research, and current health standards.

For this guide to the best green tea extract, we personally tried and investigated these supplements while thoroughly examining over 45 scientific articles and journals on the potential benefits, drawbacks, and key components of green tea extracts.

Additionally, like all health-related content on this website, this review was thoroughly vetted by one or more members of our Medical Review Board for accuracy. When choosing products to recommend, we examine various criteria. In the case of green tea extracts, we looked at safety, efficacy, cost, and convenience.

Winner: PureBulk. When it comes to taking supplements, safety is extremely important. A couple of the companies that produce our top picks — Zhou and Zenwise — do their own in-house testing rather than bringing in an independent third party.

PureBulk, however, goes further than the competition through the use of independent third-party testing to make sure its supplements are safe.

Additionally, the company makes it extremely easy for customers to request testing results and other product safety information. PureBulk products are also produced in a GMP-compliant facility, as are our other top picks — Zenwise cGMP , Zhou GMP , and Vitacost cGMP.

Winner: Zenwise. Different supplements have different reasons for being more or less effective. For some, it may be the dosage; for others, it could be the coating of its capsule. With green tea, both the beverage and the extract, the potential it holds for healthful outcomes is linked to its catechin content — particularly epigallocatechin gallate EGCG.

However, research has shown that the catechins and EGCG in brewed green tea have a tendency to break down or degrade. Zenwise green tea extract is the only one on our list that includes vitamin C ascorbic acid as an ingredient, which studies have suggested might not only prevent or reduce the degradation of catechins in your digestive system, 19 but may also increase their bioavailability.

But before you discount any green tea extract without vitamin C, know that more research is necessary to confirm these findings.

Winner: Vitacost Green Tea Extract - Standardized. While the amount of money you have to spend on a supplement definitely matters, we also take into consideration details like ingredient amounts and servings when considering the cost.

The only thing that held back Vitacost from being our runner-up was its inclusion of gelatin, which makes it unsuitable for vegetarians and vegans. The chart below compares some details of our overall winner, Zenwise, our runner-up, Zhou, and our best budget pick, Vitacost.

As a quick note regarding terms in the chart: EGCG is a catechin, and catechins are a type of polyphenol found in green tea. Our overall top pick, Zenwise, also wins our choice for convenience due to the dose it offers.

In its one-capsule dose, you get mg of green tea extract with roughly mg of EGCG. Without the purported protection that vitamin C offers, your body might not have a chance to actually use most of that EGCG before it begins to degrade, though more research is needed to confirm this.

Additionally, on the business side of things, Zenwise offers subscription options and a lifetime guarantee. More details on each product can be found in their respective sections later in this review. Additionally, we compared the sizes of the capsules offered by each company.

Black, green, and oolong teas all come from the processed leaves of Camellia sinensis. The type of tea depends on the stage of leaf development and its processing post-harvest: black tea is fermented, green tea is non-fermented, and oolong tea is semi-fermented.

Green tea is made from young tea leaves that are withered, then steamed or pan-fired, and dried. Green tea extract is a highly concentrated form of green tea. A few choice micronutrients are what make green tea such a potentially beneficial beverage.

Many different plants contain polyphenols, compounds that help plants to defend themselves against pathogens and damage from ultraviolet UV radiation. Some research shows that consuming diets rich in polyphenols may help prevent cancers, heart issues, diabetes, osteoporosis, and neurodegenerative diseases.

Certain polyphenols, like resveratrol or quercetin, act as free radical scavengers. There are over 8, different polyphenolic compounds found across various plant species.

But the four main classes of polyphenols those compounds fall into include: Specifically, green tea is rich in flavonoids.

Several studies on catechins have demonstrated the antioxidative properties of these phytochemicals. They may help our body absorb healthy foods more effectively, protect our skin from UV damage, 30 and minimize inflammation associated with allergies and inflammatory bowel disease.

There are four different types of catechins found in green tea: Of the four kinds of catechins mainly found in green tea, current research points to EGCG being the powerhouse.

More research on the effects of EGCG, specifically in humans, is needed to confirm these effects. The only FDA-approved use of green tea is in the topical ointment, Veregen sinecatechins , which is used to treat genital warts. The list of diseases and disorders that green tea may or may not help stretches on longer than this review.

And, as with any supplement, make sure you consult your doctor before taking it. The differences between green tea extract and steeped tea play out in dosing. Most studies look at the amount of EGCG in each serving to determine a healthy dose.

Taking around mg of EGCG daily should potentially be enough to see benefits without any side effects, 34 42 though studies have shown that you can take up to mg without risking your health. Additionally, green tea extract is also more stable long-term than brewed green tea.

In a study from , researchers examined how six months of storage affected the catechin content of eight different commercially sold teas. However, certain things, like the addition of vitamin C ascorbic acid , have been shown to prevent or reduce the degradation of catechins in your digestive system and potentially increase their bioavailability.

The National Institutes of Health recommends staying away from green tea extract if you take beta-blockers like nadolol. In high doses, green tea can lower the amount of blood in your body, so it interacts poorly with medications used for high blood pressure and heart problems.

The most serious risk you face when taking green tea extract, though, is liver damage. Supplements high in catechins are more likely to cause liver damage when taken in extremely large doses.

These liver problems are more likely to occur when you take more than mg of EGCG per day. The company states that this is for extra immune system support, but some studies show that vitamin C can prevent the breakdown of green tea catechins and improve bioavailability. There are green tea extracts on the market that contain more extract overall, but catechins can degrade pretty fast in the digestive system.

The caffeine content in this supplement is 14mg or less , which is about half of the caffeine in an 8oz cup of brewed green tea. And both are well below the average amount of caffeine in an 8oz cup of coffee — 96mg.

But, despite not being the smallest pill, the capsules from Zenwise are still easy to swallow and completely flavorless. Ordering from Zenwise is as easy as ordering from your typical online store.

Orders to the continental United States always have free standard shipping and arrive in business days. This might look like a full refund, a partial refund, or a different product shipped to you at no cost, depending on what fits your needs.

Additionally, the company makes it easy to find the total catechin content unlike Zenwise and the total caffeine content unlike Vitacost. We wish Zhou Nutrition and other competitors were as thorough in its safety transparency as PureBulk, which offers multiple easily-accessible safety documents for consumers on request.

The standardized version is comparable in dosage to Zhou Nutrition, while the decaf variety is pretty close to that of Zenwise. Interestingly, the standardized version has a smaller capsule than the decaf.

Vitacost products can be found on multiple online storefronts Amazon, Walmart, and so on and in many brick-and-mortar stores. The autoship can be adjusted to send you a bottle every 15, 30, 45, 60, 90, or days. In terms of refunds, Vitacost like Zhou offers a day policy length.

PureBulk offers a nice variety of options for purchasing several hundred servings of green tea extract at reasonable prices. If you take only one mg serving a day, then this bulk purchase would last you about years.

This massive amount of green tea extract is likely better suited for families who all take the supplement or even businesses, like a café that adds it to drinks.

This could definitely be a turnoff for some people looking to quickly add green tea extract to their day, but luckily the capsule options exist. If you do go for the powdered option, be warned that it is extremely bitter — emphasis on extremely. Our testers came to the conclusion that any unsweetened beverage is likely not the best option for taking powdered green tea extract.

However, this strong bitterness is what indicates that the product is truly full of polyphenols. Here you can request six different documents:. On the COA Request page, PureBulk notes that, due to a high volume of requests, it may take up to 48 hours for your request to be fulfilled.

However, we asked for all six available documents and received them within eight hours. The picture below is just a small snippet of the information PureBulk sent to us. Those prices are broken down in the small chart below. If you want to return your purchase to PureBulk, only an unopened product sent back within 90 days will get you a full refund.

This policy pales in comparison to our top choice Zenwise, which has no time limit and offers whatever fits your needs refund, new product, and so on.

Not inherently. They often have less caffeine than the equivalent amount of brewed tea, so green tea extract might be a better bet for you if you're sensitive to caffeine. All kinds of tea are healthy in different ways, but green tea has more polyphenols than black tea. This oxidation process ferments the tea, which causes it to lose some of those natural catechins and other polyphenols.

But while it might have fewer chemical antioxidant compounds, black and oolong tea can still help support healthy weight management, heart health, and a clear mind. It also has more caffeine — green tea has an average of 30mg of caffeine per cup, but black tea averages closer to 60mg per cup.

EGCG is a type of catechin, and catechins are a type of polyphenol. Often, green tea extract is orange. This is because some companies extract the polyphenols from the leaves themselves rather than just grinding up the green tea leaves, leaving behind an orange tint.

Innerbody uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

Heiss, M. The Story of Tea: A Cultural History and Drinking Guide. Ten Speed Press. Lu, H. Earliest tea as evidence for one branch of the Silk Road across the Tibetan Plateau. Scientific Reports, 6 , National Center for Complementary and Integrative Health. Green tea. Chacko, S. Beneficial effects of green tea: a literature review.

Chinese Medicine, 5 , Khan, N. Tea and Health: Studies in Humans. Current Pharmaceutical Design, 19 34 , Miyoshi, N. Applications of a Standardized Green Tea Catechin Preparation for Viral Warts and Human Papilloma Virus-Related and Unrelated Cancers. Molecules Basel, Switzerland , 25 11 , National Cancer Institute.

Dias, T. Nutritional Factors and Male Reproduction. Encyclopedia of Reproduction Second Edition , Kokubo, Y. The impact of green tea and coffee consumption on the reduced risk of stroke incidence in Japanese population: the Japan public health center-based study cohort.

Stroke, 44 5 , — Kuriyama, S. Green tea consumption and mortality due to cardiovascular disease, cancer, and all causes in Japan: the Ohsaki study. JAMA, 10 , — Questions and Answers on Dietary Supplements. Facts About the Current Good Manufacturing Practices CGMP FDA. Du, G. Epigallocatechin Gallate EGCG is the most effective cancer chemopreventive polyphenol in green tea.

Nutrients, 4 11 , — Friedman, M. Stability of Green Tea Catechins in Commercial Tea Leaves during Storage for 6 Months. Journal of Food Science, 74 2 , HH Lantano, C.

Effects of alternative steeping methods on composition, antioxidant property and colour of green, black and oolong tea infusions. Journal of Food Science and Technology, 52 12 , Chen, Z. Degradation of green tea catechins in tea drinks.

Journal of Agricultural and Food Chemistry, 49 1 , — Wang, R. Reaction kinetics of degradation and epimerization of epigallocatechin gallate EGCG in aqueous system over a wide temperature range. Journal of Agricultural and Food Chemistry, 56 8 , — Neilson, A.

Catechin degradation with concurrent formation of homo- and heterocatechin dimers during in vitro digestion. Journal of Agricultural and Food Chemistry, 55 22 , — Green, R. Common tea formulations modulate in vitro digestive recovery of green tea catechins.

Furniturewalla, A. Approaches to overcome bioavailability inconsistencies of epigallocatechin gallate, a powerful anti-oxidant in green tea. Food Chemistry Advances, 1 , Kim, H. New insights into the mechanisms of polyphenols beyond antioxidant properties; lessons from the green tea polyphenol, epigallocatechin 3-gallate.

Redox Biology, 2 , — Is Green Tea Extract Beneficial? Cleveland Clinic. Perva-Uzunalić, A. Extraction of active ingredients from green tea Camellia sinensis : Extraction efficiency of major catechins and caffeine.

Food Chemistry, 96 4 , Department of Agriculture. Beverages, tea, green, brewed, regular. FoodData Central. Williams, J. The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review.

Plant Foods for Human Nutrition Dordrecht, Netherlands , 75 1 , 12— Pandey, K. Plant polyphenols as dietary antioxidants in human health and disease. Oxidative Medicine and Cellular Longevity, 2 5 , Musial, C.

Beneficial Properties of Green Tea Catechins. International Journal of Molecular Sciences, 21 5. Panche, A. Flavonoids: An overview.

Journal of Nutritional Science, 5. Tea is the second-most popular drink in the world. People drink it for its flavor and stimulant effect.

Studies suggest that the polyphenols in tea, especially green tea, may help reduce the risk for some cancers. Or it may slow the growth of certain types of cancers. Studies done in humans have shown mixed results. Tea is used as a stimulant drink.

The methylxanthines, specifically caffeine, increase alertness. Green tea extract ointment has been shown to cure external genital and perianal warts. This product is approved by the FDA. Green tea extract comes in oral capsules.

Follow the instructions on the package for the correct dose. Green tea as loose, dried leaves or in tea bags should be steeped in hot water for a short time.

This is done to preserve important chemicals in the leaf. Green tea can cause side effects due to caffeine. These can include anxiety, tremors, irritability, and sleeping problems. Side effects are less common with green tea than with other drinks that have caffeine.

This is because the leaves are steeped for a shorter time. The fluoride content of green tea may help prevent tooth decay. But the tea also contains tannic acid.

This can stain teeth. Green tea extracts may cause liver problems. Symptoms can include yellowing of your skin or the whites of your eyes, nausea, and stomach pain. If you have these symptoms, stop using green tea and see your healthcare provider right away. The negative effects of green tea extract on the liver may depend on how much green tea extract you consume each day.

Green tea may change the effects of medicines such as nadolol, a beta-blocker used for high blood pressure and heart problems. It may keep nadolol from lowering your blood pressure as much as it should.