Green Tea Extract Product Buyer’s Guide (updated July 2024)

Approved Science Green Tea Extract Review



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Overall Rating 
Our research has shown that this manufacturer has created a product born from science and clinical data. We found that this product provides a decaffeinated Green Tea Extract with the highest antioxidant standardization – which is the most effective for optimal health benefits. This top quality formula provides the ideal dosage of antioxidants to prevent damage from free radicals, mitigate the effects of aging, reduce inflammation, protect the cardiovascular system, enhance metabolism, and protect the nervous system. It is one of the only products to contain BioPerine® which speeds up nutrient absorption and maximizes results. We liked that it offers a 60-day money-back guarantee if you are not happy with the results. 

Why do we recommend Approved Science Green Tea?

Main Benefits:

  • Provides a mega antioxidant boost -98% polyphenols, 80% catechins, 50% EGCG.
  • Enhanced bioavailability due to the addition of BioPerine®.
  • Increases the body’s natural antioxidant capacity for improved health overall.
  • Supports cardiovascular health by lowering LDL cholesterol and blood pressure.
  • Decaffeinated so it doesn’t cause jitteriness or interfere with coffee habits.
  • Neuroprotective properties for a healthier nervous system.
  • It does not contain any preservatives, artificial colorings, hormones, or unnecessary ingredients that may dilute the efficacy of the product.
  • Many supportive consumer reviews from users who had experienced excellent results, some within as little as a week.
  • Its daily suggested serving is the optimal potency as recommended by doctors for effectiveness and is supported by extensive clinical research trials and studies.
  • This manufacturer’s customer service is second to none, it provides excellent support and help. Furthermore, it offers an excellent money-back guarantee if customers are not happy with their results.


Green Tea Extract delivers all the much-praised health benefits of Green Tea but in a more bioavailable and efficient way. Any health benefits you have come to expect from drinking Green Tea are multiplied tenfold with Green Tea supplements. Research suggests that it is due to the higher concentration of antioxidants in the extract as opposed to the tea. It is important to note that not all Green Tea Extract supplements are created equally. The standardization and dosage make a huge difference in how effective the supplement will be. Additionally, some are decaffeinated while some are not. There are several key studies that help pinpoint the way when it comes to finding the most effective Green Tea Extract supplement to boost health and well-being.

Approved Science’s Green Tea is an extract standardized to the optimal amount of polyphenols at 98%. That is to say, this formula is packed with antioxidants that can fight oxidative stress and reduce damage throughout the body. Of those polyphenols, 80% are catechins. The reason this matters is that catechins can cross the blood brain barrier to reduce the risk of neurological disorders. These antioxidants can also help regulate blood pressure, speed up metabolism, and prevent chronic diseases.

50% of the antioxidants in Approved Science’s Green Tea are EGCG (epigallocatechin gallate) which is the most studied catechin. These compounds are responsible for increasing the body’s antioxidant capacity, fighting free radicals, lowering LDL cholesterol and blood pressure, improving blood sugar levels, and protecting the nervous system.

What we really like is that this product is made by a company that consistently uses clinical studies as a benchmark for the dosage of all their health supplements. There is also a 100% money-back guarantee which can be claimed by speaking to their customer service agents who are real people and not frustrating robots!

Additionally, you will not find any ingredients in Approved Science’s Green Tea Extract that shouldn’t be there. There are no added fillers, binders, additives or preservatives. There are so many products out there that do not fall within the realm of high standards, offering artificial alternatives and all sorts of extras inside their formulas. It is a relief to be able to recommend a company that manufactures such a unique, well-researched product.

To summarize, Approved Science Green Tea uses top-quality natural ingredients, provides awesome results, has a caring customer support team and a great price. From what we saw, without a doubt, this is an extremely good product.

Quality Assurance

Over the last few years, we understand how consumers have grown skeptical of nutritional health supplements. This simply comes down to shady companies providing useless formulas that contain unrelated and useless ingredients or that add fillers or binders to their products. The active ingredients are what deliver results, so when you see a long list of inactive ingredients, you should be wary. Often, these ingredients are not pure, or have not been tested for quality and have no scientific validity as to why they have been included in the formulas. Not only is this irresponsible, but often quite dangerous since there is frequently a lack of understanding when it comes to these ingredients. Truth being, there is absolutely no reason why anything artificial should be added. Natural and pure is the best. If the ingredients are in their natural form, side effects or negative interactions are unlikely to be experienced.

We were very happy to discover that Approved Science Green Tea is manufactured in an FDA-registered facility. Moreover, it is cGMP recognized and complies with the US Pharmacopeia’s standards for quality and purity. This suggests that Approved Science takes what it does very seriously, and strives to keep its products safe, natural, and effective – a mentality that we totally appreciate.


Approved Science Green Tea comes at an affordable price with some excellent multiple purchase deals, allowing you to save big. Also, this company is staunchly against any auto-ship programs, as they can be nearly impossible to cancel. This policy further supports the evidence that Approved Science is a top quality company.

Orders are shipped within 24 hours, with the exclusion of any orders placed on weekends and holidays. They are wrapped and sent in discreet packaging, with no identifying marks on the outside, unlike other companies who often have embarrassing slogans or logos. Furthermore, this company provides a 60-day risk-free money-back guarantee. If you are not 100% happy with the results, you are able to return the product and receive a full refund. That shows strong confidence in its product and we totally support that kind of guarantee.

In Conclusion

When people are searching for a good Green Tea Extract product, they may not realize that there is more to an effective supplement than simply containing the right ingredient. Standardization, potency, and dosage matter. Additionally, there are other external elements to bear in mind, such as third-party testing and comprehensive customer reviews that give us a great indication of how the product really works.

Of all the products that we reviewed, across all parameters, none compared to Approved Science’s Green Tea Extract which provides an optimal dosage of antioxidants, including the beneficial EGCG. If you are looking for a top-quality formula backed by research and scientific data that is an effective, long-term solution to improve your health by boosting antioxidants, reducing inflammation, lowering blood pressure and LDL cholesterol, revving metabolism, and stimulating neuroprotective activity, then you would be hard pressed to find anything better than Approved Science Green Tea.

Approved Science Green Tea Extract
Now Foods Thermo Green Tea
True Veda Organic Green Tea Extract
Pure Encapsulations Teavigo
Contains 90+% Polyphenol antioxidants
Contains 50% EGCG
Contains BioPerine® for increased absorption
Vegan Friendly
GMP Certified
No additives, preservatives, or artificial ingredients
Money-Back Guarantee

Read on to see what their happy customers are saying

“I’ve been drinking Green Tea for the health benefits but the amount of sugar I put in my cup has had undesirable effects. Considering that I was hoping Green Tea might help with my blood sugar among other things, it was time to find a new way to keep the benefits and cut the sugar. I chose Approved Science because it has the highest standardization of antioxidants that I found. Plus it’s got all the right qualifications in terms of manufacturing and safety. So far I haven’t been disappointed and I have nothing bad to say.” – Archie Jones

“I have noticed a decrease in my inflammation and I feel less pain so my overall wellbeing has improved and I can say that I’m happy with this product and would recommend it to a friend. In fact, I recommended it to my mother and she’s just waiting for her package to arrive.
” – Eleanor Winter

“This is by far the best green tea extract that I’ve come across and I have actually tried several products. A lot of them were too strong for me because they weren’t decaf so I like that Approved Science uses decaffeinated green tea. I feel calm and energized at the same time when I take Approved Science’s Green Tea. I love when I can actually feel the effects of a supplement instead of just wondering if it’s actually doing anything for me. This has definitely improved my health! 5 stars from me!” – Harvey Dennis 

“My husband and I take two capsules every morning with a glass of water and our other medications. I’ve noticed that my joint pain has reduced significantly and he’s felt the results as well. We’re particularly interested in the neuroprotective benefits of this supplement because no one likes to lose their mind as they get old. So far, we both feel healthier and happier. As for protecting our cognition, well, only time will tell.” – Allison Jefferson

“I absolutely love this!! I feel amazing. Combine this with eating well and exercising and you’ll feel amazing too. I love knowing that my body has the antioxidants it needs to prevent serious damage from oxidative stress. It’s so weird how oxygen is essential for life but oxidation is bad for us. So oxygen is both good and bad but I digress. Anyways, the Green Tea Extract from Approved Science is simply good for you and I recommend giving it a chance.” – Heather Richter 

“My wife has been telling me about the health benefits of Green Tea for years now but I only recently looked into the research after a scare that left me in the hospital for a few days. I had a rude awakening about how imperative it is to take care of my health. I discovered that Green Tea extracts are more powerful and purchased from Approved Science because theirs has the highest amount of antioxidants that I found. Haven’t been back to the hospital since starting to take better care of myself. Wishing all of you and your families good health. Cheers!” – Kevin Levine

“This Green Tea Extract has truly made a huge impact on my health. Before starting this supplement, my blood pressure was in the normal but high range and it’s come down to a healthier level. My body feels more youthful and I am pleased with the results.” – Brian Miles

FAQs about Approved Science Green Tea:

How does Approved Science Green Tea work?

The main driving force behind all benefits from Green Tea Extract is the antioxidant content. When it comes to the antioxidants in Green Tea, the main antioxidants are polyphenols which are further broken down to include catechins which include epigallocatechin gallate (EGCG). The more of these antioxidants you have, the greater the health benefits. Antioxidants neutralize free radicals which are atoms that have unpaired electrons and therefore damage the molecular structure of cells which can lead to aging and larger complications. What makes Green Tea Extract so unique is that it not only supplies antioxidants but it also improves the body’s ability to create its own antioxidants.

EGCG specifically has been shown to help with supporting cardiovascular health by reducing LDL (bad) cholesterol, lowering blood pressure, and improving insulin sensitivity. It is also believed to have neuroprotective properties, meaning that it helps to keep the brain healthy. While these are specific areas that benefit the most from Green Tea Extract, antioxidants work on a large scale to protect cells throughout the whole body.

Therefore, this effective Green Tea Extract supplement is standardized to a high percentage of 98% polyphenols, 80% catechins, and 50% EGCG. Since nutrition is all about absorption, Approved Science’s Green Tea formula is improved with the bioavailability enhancer, BioPerine®, for increasing and speeding up results. 

Do all Green Tea Extract supplements work in a similar way?

No, they do not. There are many companies that just ride the trends, producing inferior products with weak formulas. Many use incorrect ingredients, fillers, binders or worse ingredients that can affect desired results and even be dangerous.

What should I look for in an effective Green Tea Extract supplement?

  • It should contain a high standardization of over 90% polyphenols with at least 80% catechins and 50% EGCG.
  • It should contain a thermogenic ingredient such as BioPerine® which increases nutrient absorption for maximum results.
  • It’s contents should be consistent and reliable.
  • It should be decaffeinated so that it doesn’t interfere with your lifestyle.
  • It should come with GMP certification to demonstrate its safety and purity.
  • It should not contain any binders, fillers, additives, hormones, preservatives, or artificial ingredients.
  • It must be 100% pure, natural and with no unnecessary ingredients that could reduce the effectiveness of the product.
  • It should be formulated using the same potency as found effective in clinical studies.

Are there any side effects noted when using this product?

Our research did not uncover any negative side effects when using this product. The ingredients in Approved Science’s Green Tea Extract are all natural and 100% pure. That said, as with any supplement, we always recommend consulting with a doctor if you are pregnant, breastfeeding, have an existing medical condition, especially a liver condition, or if you are taking any other medication.

What are the dosage instructions for Approved Science Green Tea?

The manufacturers of this product suggest taking 2 capsules per day with an 8 oz. glass of water, after a meal.

As with any supplement, always follow the recommended dosage instructions and do not exceed them as this poses health risks.

How long before I can see any results?

Results will vary for each person. For some, they will see changes very quickly, while it may take longer for others. It is different for each person. Other factors that can affect results include age, diet, and lifestyle, so it is hard to say exactly. What you should look for are companies who offer a satisfaction guarantee. This suggests that they are confident that their products will deliver the desired results. And after all, if you don’t get the results you were hoping for you can always return the product. Approved Science offers a great money-back guarantee and awesome feedback on how well this product works.

What price should I expect to pay?

The cost of products vary among manufacturers. Unfortunately, many are cheap, useless supplements that have been formulated without any science-based evidence to back them up. Some of these companies are selling their products for over $80 per bottle, which is very expensive. On average, the best supplements we found are selling between the $40-$50 price range. Often, when products appear cheaper, this is indicative of low quality or a low recommended daily serving, which will not bring the results you are looking for. Be aware. Read the labels.

Which Green Tea Extract supplement should I buy?

As each person’s experience of a product is different, it is difficult to say specifically which one is the best. That said, based on several factors, we did like Approved Science Green Tea the most. We found that from the 50+ products that we looked at, Approved Science Green Tea had the best quality of ingredients, potency and strength, and positive consumer feedback. Plus, the manufacturer’s customer service was excellent.

How safe is it to order over the internet?

Ordering Green Tea Extract from Approved Science is safe to do over the internet. The manufacturer utilizes the latest encryption software to protect your credit card information and does not engage in shady schemes such as ‘automatic billing’ programs like many other companies do. They also deliver very efficiently and quickly, using discreet packaging.

Why should I choose Approved Science Green Tea?

There are several reasons why we liked this product, including purity of ingredients, quality customer service, a satisfaction guarantee, and effectiveness. Approved Science has a well crafted formula and we feel the company values the consumer’s health above their own profit margins.

This is a great product that you can depend on. It has the right ingredients in the correct potency. And if that wasn’t enough, check out the customer reviews – they say it all. It counts when there are many happy customers who are loyal to this brand singing the praises of this trustworthy product. We will summarize the key benefits one more time:

  • Provides a mega antioxidant boost -98% polyphenols, 80% catechins, 50% EGCG.
  • Enhanced bioavailability due to the addition of BioPerine®.
  • Increases the body’s natural antioxidant capacity for improved health overall.
  • Supports cardiovascular health by lowering LDL cholesterol and blood pressure.
  • Neuroprotective properties for a healthier nervous system.
  • Decaffeinated so it doesn’t cause jitteriness or interfere with coffee habits.
  • No preservatives, artificial colorings, hormones, or unnecessary ingredients that may dilute the efficacy of the product.
  • Many supportive consumer reviews from users who had experienced excellent results, some within as little as a week.
  • Its daily suggested serving is the optimal potency as recommended by doctors for effectiveness and is supported by extensive clinical research trials and studies.
  • This manufacturer’s customer service is second to none, it provides excellent support and help. Furthermore, it offers an excellent money-back guarantee if customers are not happy with their results.

In addition to offering this doctor-formulated product, Approved Science provides excellent customer service, a solid 60-day money-back guarantee if customers are not happy with their results, and manufacturers all of its products in an FDA and cGMP recognized facility that complies with the standards for quality and purity outlined by the U.S. Pharmacopeia

The Bottom Line

We like this Green Tea because we feel that Approved Science is different. It is in it for the long haul. It has researched its ingredients well and produced a formula using only pure natural ingredients with a lot of clinical data to back them up. Approved Science offers what more companies should – an effective, affordable product supported by a real concern for the health of their customers. As an added bonus, Approved Science Green Tea has many happy testimonials to support our belief that this is a great product and a great company.

What You’ll Discover:

Which Green Tea Extract supplement is the BEST BUY and comes with a great GUARANTEE!
Which formula and ingredients are the most EFFECTIVE and work the fastest?
How NOT to get ripped off! BE AWARE of poor quality and cheap products.

Top 6 Items to Consider:

  1. Ingredients
  2. Cost Per Serving
  3. Product’s Testing Results
  4. Company’s Reputation
  5. Consumer Reviews
  6. Return Policy & Satisfaction Guarantee

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