Zantrex Black Review – The Best Zantrex Yet?

By: Rob Miller
42 User Reviews
Fact Checked On: 6-2-2018

Home » Fat Burners » Zantrex Black Review – The Best Zantrex Yet?


Side Effects
Pros and Cons
Where to Buy
User Reviews

Zantrex Black Overview

Zantrex is a very popular, yet controversial weight loss supplement made by Zoller Labs.

First there was the original Zantrex 3 in the red bottle, which we’ve actually tested.

zantrex 3 red bottle

The side effects of the red bottle were just too much for some, and here’s just a sample of some of them that were left on our site back in 2015.

zantrex 3 side effects

Then there was Zantrex 3 Blue which was the company’s answer to complaints of side effects caused by original.

zantrex 3 blue bottle

The blue bottle is a GREAT fat burner, and is actually one of the best fat burners for women we’ve ever tested.

Now there’s Zantrex Black, the Accelerated Rapid Release Formula.

zantrex black review

All three of the products in the line have the same stated goals, which are to:

    • Burn fat
    • Decrease appetite
    • Give you energy
    • Help you lose weight

But they each approach it in a different way.

We’ve reviewed Red and Blue in the past.We’ve even compared them.

zantrex red vs blue bottles
So this time, we’re primarily dealing with Zantrex Black.

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Zantrex Black, as stated above, is the option for people who want a fast acting weight loss supplement that they can use in conjunction with any sensible weight loss product.

The focus is on the quickness of both the initial energy boost, and the weight loss.

So if you’re looking for instant gratification, Zantrex Black is the one to choose.

Zantrex Black Ingredients and How They Work

Of course, the most important factor in whether or not a supplement works is the formula, so let’s get right to it.

Here’s a quick look at the label:

Zantrex Black Ingredients

TheZantrex Blackformula includes:

  • Niacinwhich increases blood flow.

    It’s actually known to sometimes cause a warm “niacin fliush” where your skin gets a little red and tingly from the blood rushing through the blood vessels.

  • Protein: I’m not even sure why they included this as an ingredient in Zantrex Black, mainly because it only contains 0.5 grams. This dose is nowhere close to making any sort of reasonable difference.

The Zantrex Black Proprietary Blend which provides several sources of caffeine including:

  • Green Tea which also provides fat burning, antioxidant ECGCs which have been shown to burn fat.
  • Guarana Seed Extract: Commonly found in many other fat burners like Slim Trim and 1 M.R., Guarana is basically a stimulant that contains chemicals similar to caffeine.
  • Yerba Mate Leaf Extract: Another stimulant which is actually rich in antioxidants due to its high concentration of polyphenols.
  • Black Tea Leaf Extract
  • Kola Seed Extract
  • Trimethylxanthine (which is the chemical name for pure caffeine).

And other ingredients including:

  • Maca Root Extractwhich increases the release of dopamine from the brain.

    This improves mood and motivation to curb emotional eating.

  • Asian Ginseng Root which also improves blood flow to supply more nutrients and oxygen to your muscles while working out.
  • Damiana Leaf Extract which elevates mood and suppresses appetite.

    It may also inhibit the conversion of testosterone to estrogen.

  • Schizonepeta Flower Extract which is commonly used for colds and sore throats, but doesn’t seem to have a connection with weight loss that I’ve been able to find.
  • Black Pepperwhich helps increase thermogenic activity in the body.
  • Rhodiola Crenulata Root Extract which relieves anxiety and helps burn fat.
  • Cacao Seed Extract which can reduce the production of fat cells.

Clearly, the formula is very caffeine heavy, but because it’s all couched within a proprietary blend, we don’t know any real numbers or actual amounts.

The whole blend totals 1,160 mg, and about half the ingredients are basically caffeine, but since they don’t reveal the amounts, we don’t know how much caffeine they’re putting in Zantrex Black.

Given that this is a Zantrex product, famous for being pretty speedy, my guess is it’s a lot.

How To Take Zantrex Black

The recommended dose is 2 softgels taken about 15 minutes before main meals.

zantrex black directions

You can take 1 or 2 as needed for energy, but it is not recommended that you take more than 6 in one day.

There is also a recommendation that you avoid additional caffeine when taking Zantrex Black.

I would also add another caution against taking Zantrex Blacktoo close to bedtime.

I would imagine it would interfere with a good night’s sleep.

Zantrex Black Reviews

Next to the formula, which we now know is extremely stimulant-heavy, the second most important factor in determining whether or not Zantrex Black is any good is what kind of feedback it gets from actual customers.

We’ve actually had about 40 people leave reviews of Zantrex Black on our site.

On the one had you have the positive experiences, like this one:

zantrex black review

And this one:

And on the other hand, you have the NEGATIVE experiences that some have encountered:

zantrex black bad review

And this one: content/uploads/2014/06/negative

The positive Zantrex Black reviews outweigh the negative ones at about a 10:1 ratio, but I mean come on…

We’re not talking about people just saying things like:

  • It didn’t work for me
  • I didn’t feel any effects
  • Doesn’t work

Instead we’re seeing things about blood pressure skyrocketing and near death experiences.

Since Zantrex Black is sold at, there are dozens of reviews to look at, and the opinions are widely varied when compared to the reviews on our site.

There are almost as many 1-star reviews as there are 5-star ones.

customer reviews of zantrex black on amazon average rating

First here are a couple of the raves, all from verified purchases:

amazon 5 star review of Zantrex Black

And here’s some of the feedback from unhappy customers:

negative reviews of zantrex black on amazon

As mentioned earlier, we actually have about40 customer reviews posted below, and the vast majority reflect those on Amazon.

Something important to make note of in the reviews is that even people that like Zantrex Black mention the side effects.

It’s mainly a matter of degree of tolerability that determines whether or not the reviews are good or bad.

There seems to be little question that Zantrex Black can increase your energy, and that’s the primary benefit users talk about.

But for some, the side effects are too much.

Zantrex Black Side Effects

There’s a lot of caffeine in Zantrex Black, so anyone who’s sensitive to the stuff should beware.

If you want to avoid jitters, a racing heartbeat, and sleeplessness, you may want to start out with just one pill at first.

That way, any side effects you do face will be mild and hopefully won’t last as long.

You’ll also want to stay away from additional sources of caffeine, such as coffee and soda.

The other common side effect is known as “The Niacin Flush”, which we talked about earlier.

The Zantrex Black formula has 30 mg, which is 150% of the daily recommended amount.

This much niacin often makes your skin red and makes you feel like your skin is burning up.

The feeling should only last a few minutes, but it can be very unpleasant, and even a little scary for some people.

Some users expect it, and just let it happen, knowing it will pass. For others, it’s too uncomfortable and turns them away from the product altogether.

Zantrex Black Pros and Cons

Advantages of Zantrex Black

  • It’s affordable.
  • Just about every Zantrex Blackreview from a customer that I’ve seen says it works as a great appetite suppressant.

    Most people say it practically eliminates their appetites.

Disadvantages of Zantrex Black

  • It’s got a boatload of caffeine, though we don’t know exactly how much because each of its caffeine sources are included in the proprietary blend that doesn’t offer amounts.
  • Lots of people get side effects like stomach aches, headaches, and dizziness.
  • You need to eliminate other sources of caffeine while you’re taking it.

Zantrex Black Compared With Zantrex Red and Zantrex Blue

Almost nobody questions whether or not each of these products woks for energy and appetite suppression.

They all work.

So we move on to side effects.

People who are sensitive to stimulants will have about an equal (and not pleasant) reaction to the Red and the Black.

And they both work very well.

Zantrex Blue works as well, but seems to come with fewer problems.

Where to Buy

You can buy Zantrex Black in stores like Walmart, Target, and CVS or online directly through the product site or through sites like

A bottle of 84 softgels sells for about $25 or less depending on where you go.

Prices don’t vary too much so where you choose will come down to a matter of convenience.


Zantrex Black works.

But anyone who doesn’t react well to caffeine or isn’t fond of the jittery feeling that certain stimulants cause will not feel good takingZantrex Black.

Even for people who don’t mind the feeling, I would recommend you treat Zantrex Black as a short term supplement to boost your efforts or push you through a stubborn plateau.

It’s not the kind of supplement you want to be taking month after month.

And if you do decide to try it, do so with caution.

Start with just one pill so you can experience any side effects more mildly.

Be prepared for the Niacin Flush.

Drink a good amount of water and wait it out.

It shouldn’t be long, then you’ll be left with the energy and appetite suppression you’re looking for.

Have You Used Zantrex Black?

Leave Your Review Below

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User Reviews

Have you used this supplement?

The best!

By Michael,  Jul 7, 2015

I have been taking this product for about a month. I take one when I wake up around 8am,and another at aaround 3pm.

It decreases my appetite,gives me energy,and with alot of water and walking have successfully lost 21 pounds. I have had no side effects so far.

Bit I do HIGHLY recommend this to people who want to lose weight.

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133 out of 138 people found this review helpful.

No snacking, no jitters, lots of energy

By Tanya,  Sep 11, 2014



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86 out of 87 people found this review helpful.

The worst

By Aaron,  May 5, 2015

I took zantrex black for 2 days and it was going great. The 3rd day..... not so much.

I took my 2nd dose of 2 caps. With in 10 minutes my face, neck, and cheat was on fire.

Followed by the shakes, light headed, chest pains, and trouble breathing. My wife called 911. The firefighters took my BP and heart rate.

My BP was 191/189 PULSE of 180.

Went to the er and given many meds for high BP and heart rate. After 2 hours it was back to normal.

In my opinion it is not worth your life! This was a very scary moment for me.

Note... i am a 25 year old male and weight 215 with NO health problems. Some people do just fine on these pills while others do not.

Just be careful and pay attention to your symptoms if you begin to get "flush" or start burning.

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71 out of 88 people found this review helpful.

Drew's Review

By Drew,  Jun 30, 2015

Today is the second day I'm taking this product. I haven't really taken anything before and I usually don't I take a lot of caffeine except for the occasional coffe or energy drink, so it's hitting me pretty hard.

I've limited myself to two soft gels in the morning and then done for the day. Even so, I am taking this while on the paleo diet and it controls my appetite pretty well.

The only thing I'd complain about is the jitteriness right after taking and the stomach ache that lasts for about a half hour. Other than that, this gives me lots of energy to work with considering I tend to get unmotivated.

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55 out of 62 people found this review helpful.


By Christina,  Dec 2, 2014

I have taken Zantrex Black for 3 days and have seen a significant change! I did have the Niacin Flush the first day but it didn't bother me.

I probably would only use this to get over a plateau and not all the time due to the caffiene. Worked amazing for right after Thanksgiving!

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52 out of 56 people found this review helpful.

Ask A Question

User Questions and Answers

i took the first dose of Zantrex black which is 2 pills 15min before breakfast. I experienced the flushing, but that went away. Now I'm feeling terrible nausea. When will that feeling stop? And what should I do about it? Please help. -Ashley

Zantrex pills are very strong.  Try taking one pill at a time instead of two, and make sure you drink plenty of water. If you still feel nauseous, you should discontinue use.- Rob

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14 out of 16 people found this question helpful.

What stores sell Zantrex Black? -Jennifer

You can find this supplement on the shelves of many brick and mortar stores like GNC, Walgreens, Walmart, and many others.- Rob

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10 out of 13 people found this question helpful.

I am celiac, is zantrex black gluten free? -ben

All of the ingredients within Zantrex Black are gluten free; however the manufacturer does not claim to be a gluten free facility.- Rob

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8 out of 12 people found this question helpful.


Cut your dose in half, take it with a meal, and make sure you continue to drink plenty of water.  If that doesn't change things, you may have to switch to something with fewer stimulants.- Rob

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6 out of 8 people found this question helpful.

Is zantrex3 red testosterone booster? -Daniel

It's a fat burner/weight loss supplement.- Rob

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1 out of 1 people found this question helpful.

Author: Rob Miller

Supplement Critique

Rob Miller founded over 7 years ago, and has been the chief editor ever since. He has a diploma in Advanced Dietary Supplements Advisor, and worked at GNC for 3 years. He KNOWS supplements, both inside and out. Rob currently resides in Jupiter, FL, with his wife of 4 years.  Learn more about him in his Bio here. Follow him on Twitter , Facebook, LinkedIn, or find him on Google +.