- Green Tea Extract is yet another natural weight loss ingredient prepared from unfermented leaves, containing a high amount of powerful antioxidants.
- This ingredient has been found to not only burn stubborn body fat, but also to increase energy expenditure, and suppress appetite, amongst other benefits. Yes Green Tea Extract is one fantastic nutrient indeed! With a higher rate of fat burn, and less of an appetite for belly busting fast food, your body can shred pounds to make way for lean muscle.
- It is mainly the combination of catechins and caffeine found in green tea extract that bring about these positive effects. That is why we made sure that the Green Tea Extract in the Burniva Formula contains 95% catechins, impressive right? This makes it far superior than other GTE supplements on the market, as these usually contain a much lower concentration of around 50%.
- Moreover, the addition of Caffeine Anhydrous to the Burniva Formula reinforces the energy expenditure brought about by the Green Tea Extract due to the synergy that co-exists between them!
Green Tea Extract Overview
Tea can be categorized in 3 main varieties: green, black & oolong tea. The three are derived from the same plant Camellia sinensis, and the difference between the three lies in the process of fermentation. Green tea is prepared from unfermented leaves and for this reason reports the highest amount of powerful antioxidants when compared to the other types of teas. Antioxidants are believed to fight free radicals, compounds that develop anomalies in the body causing health problems and aging. The antioxidants found in green tea are called polyphenols.
Polyphenols, are mainly made up of flavanols which are often referred to as catechins. This is why the words ‘polyphenols’ and ‘catechins’ are often interchanged. In this study it was shown that catechins in green tea extract can be further broken down into the following major ones: epicatechin, epigallocatechin, epicatechin-3-gallate, and apigallocatechin gallate (also known as EGCG), with EGCG being the most active one.
Beside polyphenols, green tea also contains caffeine which brings about the stimulant effect reported in green tea.
All these classifications may all sound rather confusing, we know! All you really need to know is that it is mainly the combination of catechins and caffeine found in green tea extract that play a role in weight loss and weight loss management.
For more relevant information regarding the health benefits read the Green Tea Guide by University of Maryland Medical Center.
How Green Tea Extract Causes Weight Loss
In Asia, people have known about the potential health benefits of green tea for over a 100 years now. In the western world this link has only been evaluated recently in the last decade or so, and so far studies seem to point towards a positive one!
In a meta-analysis of 11 pubmed articles conducted on human subjects, it was concluded that green tea indeed shows a significant decrease in body weight, and even more importantly, a significantly maintained body weight following a weight loss period was also observed.
The predominant hypotheses behind weight loss in relation to green tea extract were outlined in the following review. These processes are discussed further below.
1. Thermogenesis & Increased Energy Expenditure After Green Tea Extract Intake Several studies (as illustrated in this review) have concluded that green tea extract has an effect on energy expenditure, with this study showing a 4% increase in energy expenditure, hence 4% more calories burned, in a 24 hour period! It was shown that this change in energy expenditure is the results of green tea extract catechins, rather than the result of its caffeine content per se.
2. Green Tea Extract Fat Burning Properties – Increased Fat Oxidation Fat oxidation as explained above, is a process whereby the body uses fatty acids from fat stores rather than carbohydrates. This process allows us to get rid of stubborn fat deposits in our body, such as belly fat. Mixed results have been obtained with regards this hypothesis, as the underlying mechanism of how this happens is still unclear. It is however likely that fat oxidation effects of GTE may be increased especially during exercise. In fact, in this study involving GTE intake, fat oxidation was shown to increase by a whopping 17% during a moderately intensive session! It therefore seems that this GTE benefit is particularly enjoyed by those willing to do some sort of exercise.
3. Green Tea Extract & Its Effect On Nutrient Absorption Several in vitro and in vivo studies have observed a relationship between GTE and a reduction of glucose (carbohydrates) absorption. In one study, following meals containing green tea extract there was a 25% carbohydrate malabsorption when compared to controls that did not eat meals containing green tea extract. This means that GTE may block some carbohydrates from being absorbed in the intestines after a meal, and instead the body just proceeds to get rid of them. Sounds brilliant, right? Similar hypothesis were proposed for fats in foods, yet data with regards this issue is still inconclusive.
4. Green Tea Extract & Its Involvement In Appetite Suppression Appetite suppression is not something easy to measure. However in rat studies it has been observed that substances known to interact with fat oxidation processes in our body, seem to also reduce appetite. In fact in this study, an 8% (approx 95 calories) reduction in calorie consumption was observed after 500mg GTE intake.
To be completely unbiased, other studies reviewed here, have however failed to show any significant difference. Yet a confounding factor here might be the fact that changes may be very difficult to detect, especially when subjects are expected to self-report their calorie intake.
Catechin Content In Burniva Green Tea Extract
As already explained, catechin concentration is a very important feature to consider in green tea extract. To give you an idea, one cup of properly brewed green tea contains approximately 100 mg catechins. Before you hop off to the supermarket for tea bags bear in mind the amounts of green tea extract that you’ll need will be quite high, so that’s a lot of drinking!
Each Burniva tablet contains 500mg green tea extract of which 95% are catechins. This amounts to 1000mg per day.