Zantrex Black Review (New 2020) – Does It Work? Ingredients, Side-Effects, Results


  Zantrex is a word that has become somewhat synonymous with fat burning supplements in general. Zantrex itself is an extremely popular (yet at times, controversial) weight loss supplement, made by the supplement company Zoller Labs.

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Zantrex first gained a massive rise in popularity in response to its thermogenic supplement, ‘Zantrex 3’, a thermogenic compound that was suggested to promote considerable weight loss (and by all accounts, did so quite successfully).

But, Zantrex 3 was said to have a host of nasty side effects.

In response to these, Zantrex Blue was formed, providing a weight loss supplement said to promote substantial amounts of fat loss without the jitteriness associated with stimulant consumption (such as those found in Zantrex 3).

More recently, Zollo Labs have released a new Zantrex Supplement, Zantrex Black.

Zantrex Black is known as the Accelerated release Formula, and is said to burn fat, suppress appetite, provide a large energy boost, and all while promoting substantial weight loss.

In this regard Zantrex Black differs somewhat from other Zantrex supplements in that it targets those individuals who want to lose weight rapidly, and is ideally used with a very low energy diet.

Zantrex Black Ingredients

Zantrex black utilises a large number of ingredients to try to achieve its somewhat lofty goals. To gain a good understanding of the effectiveness of Zantrex Black at meeting these goals, we are going to take an in depth look at its key ingredients, and the way in which they interact with the body.

Yerba Mate Extract

Yerba Mate Extract is extract from the Ilex paraguariensis (also known as the yerba mate tree…), a tree found natively throughout the Middle East and South America. Yerba Mate Extract contains both a high amount of antioxidants (which have shown to effect blood cholesterol in a positive manner), and a large amount of caffeine.

The supplementation of Yerba Mate has been shown to increase fat oxidation rate at rest, suggesting an increase in the amount of fat being broken down for energy despite no increase in activity levels [1].

Furthermore, Yerba Mate has been suggested to influence as an appetite suppressant when supplemented in high enough doses, although there is limited research to suggest this is the case.

Guarana Seed Extract

Guarana seed extract is an ingredient that occurs commonly in energy drinks, where it is said to provide an increases in energy levels, and improve athletic performance. Guarana seed is an interesting compound, as it actually contains more caffeine per milligram than the coffee bean, and most of its suggested benefits are likely a result of its high caffeine content.

In saying that, Guarana supplementation has shown to increase the rate of fat oxidation within the body, suggesting an increased rate in which fat is broken down to be used for energy [2].

It has also been suggested to improve mental clarity and cognitive function (similar to traditional caffeine supplementation), and as such may play an important role in reducing the lethargy associated with low energy diets.


Trimethlxanthine is a compound commonly known as caffeine.

It is well known that caffeine is found naturally in tea, coffee and the cacao plant. As such, it is one of the most commonly consumed drugs in the world, where it is renowned for its stimulant like effects on the human body.

Caffeine is used regularly in both energy drinks and fat burning supplements alike, where it is suggested to promote fat loss, while keeping metal clarity and energy levels high.

The supplementation of caffeine has been shown to increase the resting metabolic rate of humans by up to 11%, while simultaneously increasing the breakdown of fat for energy by up to 13% [3]. By both increasing our ability to use fat for energy, while also increasing the amount of energy we burn at rest, caffeine can improve our ability to lose fat significantly.

As an added bonus, caffeine supplementation has also been suggested to stave of hunger and increase energy levels, making it a solid inclusion into any weight loss supplement.

Damiana Leaf extract

Damiiana Leaf extract comes from the leaves of the Turnera Diffusa plant, and has been used in traditional eastern medicine as an aphrodisiac.

When combined with guarana and yerba mate, the supplementation of Damina Leaf has been said to acts as an extreme appetite suppressant, further improving the effect of fat burning compounds by limiting food intake,

Despite its increasing popularity in the supplement world, there is no evidence to suggest its value as an appetite suppressant.

Green Tea Extract

Green tea extract has become commonplace in both our households and in fat loss supplements, with its associations with improved health and weight loss apparent.

The supplementation of Green tea has shown to cause an increase in the rate at which fat is broken down and used for energy, while simultaneously increasing the resting metabolism of the body.

By increasing these two key factors, we can increase fat loss significantly, by making fat more available for energy AND increasing the amount of energy we burn at rest [4].

As an added bonus, green tea has also been linked to improvements in immune system function, while also being suggested to improve markers of cardiovascular and metabolic health.

Kola Seed Extract

Kola seed supplementation is less common than most other ingredients within this supplement, and was used in traditional Chinese medicine where it was described to improve mental clarity.

The supplementation of Kola Seed extract has shown improve mental clarity, increasing sensations of alertness, calmness, and contentedness, while also improving reaction time, and reducing sensations of stress [5].

As such, the inclusion of Kola Seed into a supplement of this nature may have merit by improving mental cognition during a severe energy deficit, and may counteract some of the side effects associated with a high caffeine intake.

Schizonepeta Extract

Schizonepeta Extract (also known as Japanese Catnip) has been used traditionally as a way to treat the common cold, while also improving immune system properties.

It has been suggested to positively effect inflammation at the cellular level, where it has been demonstrated to reduce inflammation. As such, it may help reduce the side effects a associated with heavy dieting and a high stimulant intake, but more research is needed to prove this.

Black Pepper Extract

Black pepper is one of the most commonly used spices in the world, and while it is more commonly known for its flavour enhancing abilities, it has also been suggested to aid fat loss through a somewhat unique mechanism.

Black pepper contains a compound called piperine, which has been suggested to inhibit the formation of new fat cells. As such, black pepper extract may help promote fat loss, particularly in overweight or obese individuals, by reducing the production of new fat cells, although there is currently limited research to suggest this is the case.

Asian Ginseng

Asian Ginseng is an ingredient that has shown to improve cognition and memory when supplemented effectively [6], and as such may play an important role in keeping energy levels high while also reducing lethargy associated with low energy diets.

Although it is important to note that the positive effects of Asian ginseng are only seen at relatively high doses, and the amount provided in Zantrex Black may not be enough to stimulant a recognisable response.

Black Tea extract

Black tea extract has shown similar effects to both caffeine and yerba mate, due to its high caffeine content. The supplementation of black tea extract has shown to increase metabolic rate at rest, while also increasing the rate at which fat is broken down for energy in the body.

By increasing the amount of fat being broken down for energy, and the amount of energy needed by the body, black tea extract is though to lead to significant weight loss.

Ingredient Summary

While there are a number of ingredients within Zantrex Black that are known to contribute to weight loss and improve energy levels, most of these are due to their high caffeine content.

It is therefore extremely important to note that as a result, this supplement may come at a cost, causing sensations of jitteriness, headaches, stomach cramps, and potential energy crashes 1-2 hours after supplementation.

Some of the other ingredients may have positive effects on weight loss, and may actually limit the side effects of caffeine, but much more research is needed to support there claims, making it hard to determine whether there inclusion is in fact beneficial at all.


There is no question as to whether Zantrex will improve energy levels and increase metabolism – because it certainly will.

This can be put down to the extremely high caffeine dosage included within its formula.

As a result, it is highly likely that the use of this supplement will have some associated side effects, some of which will come down to your individual tolerability to caffeine.

If you find that this supplements causes discomfort, I would certainly recommend ceasing taking it, although if you find you have a high tolerability to stimulant such as caffeine, then this supplement may be ok for you individually.

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1. Martinet, A., K. Hostettmann, and Y. Schutz. “Thermogenic effects of commercially available plant preparations aimed at treating human obesity.” Phytomedicine 6.4 (1999): 231-238. Viewed at:

2. Lima, Waldecir P., et al. “Lipid metabolism in trained rats: effect of guarana (Paullinia cupana Mart.) supplementation.” Clinical Nutrition 24.6 (2005): 1019-1028. Viewed at:

3. Acheson, Kevin J., et al. “Caffeine and coffee: their influence on metabolic rate and substrate utilization in normal weight and obese individuals.” The American journal of clinical nutrition 33.5 (1980): 989-997. Viewed at:

4. Dulloo, Abdul G., et al. “Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans.” The American journal of clinical nutrition 70.6 (1999): 1040-1045. Viewed at:

5. Mana, U., et al. “A clinical study on the management of generalized anxiety disorder with Centella asiatica.” Nepal Med Coll J 12.1 (2010): 8-11. Viewed at:

6. Reay, Jonathon L., Andrew B. Scholey, and David O. Kennedy. “Panax ginseng (G115) improves aspects of working memory performance and subjective ratings of calmness in healthy young adults.” Human Psychopharmacology: Clinical and Experimental 25.6 (2010): 462-471. Viewed at:


About the Author John Wright

John has been a fitness enthusiast for over 10 years, starting out while struggling with obesity as a teenager. Over the years he has advised numerous clients on how to transform their physiques and their lives. As a writer on Nutrition Inspector he aims to help others achieve real results by staying clear of the common hype and false claims in the supplement industry! You can contact him via the "About Us" page.

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