Last updated: August 7, 2021

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Welcome to our big green tea extract test 2021. Here we present all the green tea preparations that we have tested in detail. We have compiled detailed background information and added a summary of customer reviews on the internet.

We would like to make your purchase decision easier and help you find the best green tea extract for you.

You will also find answers to frequently asked questions in our guide. Furthermore, you will also find some important information on this page that you should pay attention to if you want to buy green tea extract.




Summary

  • Green tea extract is a dietary supplement made from green tea. It mainly contains catechins (especially epigallatecatechin gallate; EGCG for short) as an active ingredient for health. Catechins are classified as polyphenols (secondary plant substances). In addition, it also contains various vitamins, minerals, trace elements and partly caffeine, which have an effect on the body.
  • Basically, the product types of this dietary supplement are differentiated according to the form. It is mainly produced as capsules, tablets or powder. These preparations have the advantage over the green tea infusion that the active ingredients are contained in highly concentrated quantities. In addition, it is easier to take them on the go.
  • Epigallocatchingallate and the other catechins have already shown numerous positive effects on health in a large number of studies. Among other things, they have an effect on the immune system against free radicals, help with weight loss or fat burning, stimulate the metabolism and promote concentration.

The best green tea extract: Our picks

Advice: Questions you should ask yourself before buying green tea extract

What is green tea extract and how is it made?

Green tea extract is a dietary supplement and, as the name suggests, is made from green tea and contains the ingredients of green tea in a processed and highly concentrated form.

In the first step, the young leaves of the Camellia sinsensis are gently dried and then extracted (drawn out) from the natural product. This means that the end product is not grown synthetically.

Most of the products are capsules. However, there are also some manufacturers who produce the concentrate in the form of tablets or even powder. The advantages and disadvantages of the different types of products will be explained in the course of this article.

What are the ingredients of the green tea preparation and what positive effects do they have on the body?

The ingredients that are mainly responsible for the positive health effects belong to the polyphenols (secondary plant substances). Most products contain between 90 and 100 percent polyphenols (varies depending on the type of product).

Green tea extract has a high content of catechins, especially epigallocatechin gallate (EGCG), which often accounts for up to 50 percent.

Grüner Tee wird in Tasse gegossen

Green tea has many valuable ingredients. If you don't like drinking tea, you can also take it in the form of capsules or powder. (Image source: pixabay.com / Pexels)

On the one hand, this bitter substance works primarily to prevent diseases and improves well-being. On the other hand, however, science has already found indications that the substance could also be used in medicine to fight diseases in the future.

  • In particular, EGCG supports the following functions in your body when taken in sufficient amounts:
  • has an anti-inflammatory and antioxidant effect, normalises a damaged immune system, protects nerve cells
  • regulates insulin and blood sugar levels (reduces the feeling of hunger)
  • Prevents cancer, inhibits tumour growth
  • prevents the spread of endometriosis and uterine fibroids in women
  • lowers cholesterol levels and increases elasticity of blood vessels (prevention of heart disease)
  • increases cognitive performance
  • has a relaxing and anti-stress effect (inhibits the formation of the stress hormone cortisol)
  • stimulates metabolism and promotes fat burning (prevention of overweight)

In addition, other healthy micronutrients such as vitamins (e.g. vitamin C to maintain a healthy immune system) and minerals (e.g. magnesium for normal muscle function) as well as caffeine (increases alertness) are usually present in the products.

However, it should be noted that the positive effects of green tea and its extraction are primarily due to the content of catechins (especially epigallocatechin gallate; EGCG for short). These secondary plant substances are contained in sufficiently high amounts, while the amounts of minerals and vitamins are rather negligible.

Who is the supplement suitable for?

Since the food supplement has very different effects on your health and well-being, it is suitable for almost everyone.

In particular, the following target groups are addressed:

  • Athletes, bodybuilders and fitness enthusiasts
  • Nutrition- and health-conscious people
  • Students or people with concentration problems in general
  • Figure-conscious and weight-loss enthusiasts

As an athlete, you can use green tea extract to improve your performance or to reduce fat and weight. However, you do not have to be a bodybuilder who trains five times a week. The tea extract also has a stimulating effect on the metabolism in less active people.

Did you know that green tea extract can support diets?

Green tea extract promotes fat loss and fat burning, which means it can be taken as an additional supplement when dieting.

You are neither an athlete nor do you want to reduce your weight or fat percentage, but your health and general well-being are important to you? The supplement is also suitable for health fanatics who want to strengthen their immune system and counteract the stress of everyday life.

For people who already have elevated cholesterol levels or for women who suffer from fibroids (growths in the uterus), the product is also ideal for counteracting them.

If you are a student or your daily routine requires your full concentration and cognitive performance, you can also consider supplementing your diet with green tea extract.

Note: The supplement should not be taken by pregnant or breastfeeding women or by children.

How do you properly dose the supplement and is there a risk of side effects?

The manufacturers of food supplements usually provide information on the packaging about what dosage is appropriate and recommended for the respective product. However, in the case of green tea concentrates, these indications vary greatly.

According to the European Food Safety Authority (EFSA), products with a daily recommendation of 5 to 1000 mg EGCG per day can be found on the market.

Scientists do not yet agree on the recommended daily dose. However, it has already been established that no measurable effects could be observed if the intake was too low, and that liver damage could be observed if the intake was too high.

The EFSA therefore recommends a maximum dose of 800 mg EGCG not to be exceeded. Studies have already shown that higher doses resulted in increased liver values.

Therefore, you should always consider the information given on the packaging and not exceed the recommended daily dose. However, before taking the supplement, it is advisable to calculate exactly how much EGCG you are taking in the recommended daily dosage. If this exceeds 800 mg, it makes sense to minimise it to the reference value.

When taking green tea extract regularly, you should make sure that you limit your daily intake of EGCG to a maximum of 800 mg.

The following table gives an overview of the recommended amount of green tea extract depending on its use:

Use Daily dosage of EGCG intake
Improve fat loss 400-500mg without caffeine
For general health optimisation 200mg spread throughout the day
High cholesterol 200mg - 400mg 2x 200mg per day
Cancer prevention 600mg - 800mg 3x 200mg per day

When is the best time to take it?

The optimal time to take green tea extract varies depending on the goal you want to achieve with the help of green tea extract.

If you are using it as part of your fitness training to improve performance, it is best to take the supplement directly before the training session.

If you are simply taking it to promote your health or well-being, it is best to take it before a meal.

What are the alternatives to green tea extract?

If you are not a fan of supplements, you can simply drink green tea.

The advantage of the conventional tea infusion is that you usually do not exceed the recommended maximum daily dose of 800 mg EGCG and you also supply your body with sufficient liquid.

There are many different types of green tea, which are mainly distinguished by their taste and origin. A few varieties are presented below:

Green tea variety country of origin taste
Sencha Japan, China and Taiwan varies from tart and bitter to fragrant, fresh and slightly
Gyokuro Japan strong and sweet
Chun Mee China and Taiwan strong and slightly smoky
Bancha Japan, China and Taiwan fresh-tart
Matcha Japan fine-tart

However, to see a positive health effect, you should drink at least five cups of green tea per day.

Decision: What types of green tea extracts are there and which is right for you?

Manufacturers produce green tea extract in different forms. You can choose between the following alternatives:

  • Capsules
  • Tablets
  • Powder

In the following, we will now go into more detail about the various advantages and disadvantages of the different product forms.

What are the advantages and disadvantages of green tea extract in the form of capsules?

As already mentioned, most green tea extracts are offered in the form of capsules. Since these are filled with the green tea extract by machine, the proportion of the concentrated active ingredients is exactly determined and you do not have to measure for the correct dosage.

Another advantage of the capsules is that you can take them with some liquid at any time, even when you are on the go.

The capsule shell is made of different materials from product to product. Some make it from gelatine or microcrystalline cellulose (a non-water-soluble substance). However, some manufacturers also use water-soluble cellulose (HPMC) for the capsule shell, which is completely harmless due to its water-solubility.

Advantages
  • precisely measurable dosage
  • practical for on the go
  • no container needed for mixing
Disadvantages
  • Capsule shell often not vegan or made of additives
  • often contains other additives

However, they often contain other additives as separating agents, fillers or binders. On the one hand, this can be described as a disadvantage, as gelatine is not suitable for vegans. On the other hand, there is still no scientific consensus on whether the additives have a long-term negative effect on the human body.

What are the advantages and disadvantages of green tea extract in tablet form?

The tablets are similar to the capsules. They are also automatically dosed and you do not have to use a measuring cup or a scale to determine the amount to be taken. This means you are on the safe side with regard to overdosing, as long as you adhere to the EFSA reference values.

Advantages
  • no capsule shell
  • precisely measurable dosage
  • practical for on the go
  • no container needed for mixing
Disadvantages
  • often contains additives (e.g. pressing and binding agents)

You can also take the tablets conveniently on the go. However, there is one difference to the capsule. No capsule shell is needed and at least for this one additive is omitted (unless the capsule is made of water-soluble cellulose).

Nevertheless, tablets also often contain additives such as calcium phosphate. Although these are permitted in the food industry for the manufacture of products, nutrition experts consider them to be harmful to health if taken regularly.

What are the advantages and disadvantages of green tea extract in powder form?

Products produced in powder form usually contain 100 percent green tea extract and are therefore recommended due to their purity and freedom from other additives. Due to the powder form, you can also mix the product with fruit juices or other liquids to get an appealing flavour.

Disadvantages
  • Product consists of 100 percent extract (no additives)
  • can be mixed with liquids and consumed as desired
Advantages
  • exact amount to be taken cannot be measured exactly
  • container and scale are needed for mixing and dosing

However, it is rather difficult to adhere to the exact reference quantities when dosing green tea extract. Since the recommended amounts are milligram values, measuring with a measuring cup or scale is rather imprecise.

Another disadvantage is that you cannot easily take it on the go. You need a container to fill the powder with the liquid of your choice.

Buying criteria: These are the factors you can use to compare and evaluate green tea extracts

In the following, we will show you which aspects you can use to decide between the many different products from different manufacturers.

The criteria you can use to compare the different products include the following:

  • Suitable for vegans and allergy sufferers
  • Concentration of green tea extract
  • Freedom from undesirable additives
  • Price-performance ratio

In the following paragraphs we will explain these criteria in detail. This will help you decide whether you want to buy a product based on the criteria or not.

Suitability for vegans and allergy sufferers

As already mentioned in the previous chapters, capsules in particular are often made with animal ingredients such as gelatine. For this reason, they are not suitable for vegans or vegetarians and are therefore not suitable for everyone.

In addition, many supplement manufacturers often produce protein powders or other supplements that are made from milk, soy or eggs. Since the same machines and equipment are used for the production of these as for the production of the green tea extract, it may contain traces of milk, soy or eggs.

Grüntee Kapseln

Green tea extract contains the natural ingredients of green tea in a highly concentrated measure and is produced in the form of capsules, among other things. (Image source: 123rf.com / 109539729)

In the case of the ranked products in this article, it is sometimes explicitly stated that these substances are not contained in the product. In the other products, no reference to this was found, which also suggests that no allergens are contained in the product.

Concentration level of the active ingredients (ECGC)

Especially the capsules and tablets are sold in different dosages. It should be noted once again that too low doses have little to no effect and too high doses (more than 800 mg EGCG per day) can lead to liver damage.

Therefore, products that indicated a daily dose on the packaging that was higher than the EFSA recommended maximum daily intake were rated as adverse. Manufacturers who have labelled their product with lower individual doses and who have kept to the EFSA guideline value for the daily recommendation were rated positively.

Freedom from undesirable ingredients that are harmful to health

In addition to green tea extract, many capsules and tablets contain additives that nutrition experts consider harmful to health. These are mainly fillers, binders, anti-caking agents and colourings.

Microcrystalline cellulose is a fine plant fibre produced from plant waste in a chemical process. These act in tablets or capsules as a pressing material or separating and flowing agent. In principle, this substance is officially not considered harmful to health. However, these fibres, if small enough, can penetrate the human body and cannot be further processed.

As there are no long-term studies on the effects of this substance in the body, it cannot be ruled out that it may cause damage to health.

The situation is similar with the additive magnesium salts of fatty acids. Officially, the additive is approved by the authorities for production. However, since no long-term studies on the long-term effects of the substance are available yet, a health hazard cannot be completely ruled out.

Calcium phosphates are also frequently used in green tea extracts and serve as acidity regulators. However, this additive is subject to strong criticism. Although it is contained in the product to an insignificantly small extent, calcium phosphate can influence the calcium level in the human body. Therefore, people with osteoperosis in particular should avoid products containing this ingredient.

Products that contain these additives were rated negatively in the ranking and products that do not contain additives were rated positively.

Price-performance ratio

As with all products, however, the price-performance ratio also plays a role in the evaluation of product alternatives. Since the manufacturers sell different green tea extracts in different forms, quantities and dosages, the different products could not be easily compared with each other.

Picture source: 123rf.com / 96271795

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