Updated: 04/18/2017 - Site operated by Leptigen

Zantrex Review - Does This Fat Burner Work?

  • 36 User Comments
  • Rating: 3.9. From 34 votes.
By Summer Banks Apr 08, 2017

I’m here to cut through the noise and get you the bottom line on Zantrex. Here at DietSpotlight we created an in-depth review, examining the side effects, ingredients, clinical research and level of customer service. Plus we scrutinized dozens of customer comments that are posted on the internet. Lastly, we summarized and condensed this information to provide you with the important facts.

Zantrex Readers: Click here to find out why we're giving away samples of our product, Leptigen.

What is Zantrex?

To start things off, Zantrex-3 is a dietary supplement that is made by Zoller Laboratories. This product is supposed to provide extreme energy, while encouraging rapid weight-loss. For maximum results, you must take two capsules 15-30 minutes before breakfast, lunch and dinner. Be sure to drink a full glass of water with each serving. This diet pill contains Niacin (30mg), Yerba Mate, Guarana Seed Extract, Trimethylxanthine, Damiana, Panax Ginseng, Kola Seed Extract, Black Tea Leaf Extract, Schizonepeta Flower Extract, Black Pepper Fruit Extract, Rhodiola Crenulata Extract, Green Tea Leaf Extract, Maca Root Extract and Cacao Seed Extract.

We are unsure when Zantrex was first released, but this supplement has been available since at least 2013. It is manufactured in the USA, and can be purchased online. A 30-day satisfaction guarantee is provided. This diet product is also available on dealer websites, but read on…

Side Effects – “Is it Safe?”

First of all, we are a little concerned with the possibility of Zantrex side effects. According to our Research Editor, “After reading some customer reviews pertaining to Zantrex-3, it’s clear that some people experience unwanted reactions. Naturally this is very concerning.”

One person stated, “I’ve been on it 3 days and I feel dreadful, so nauseous and a headache from the pills. I don’t think it’s worth the side effects. I’ve spent all of the 3rd day in bed.”

“Haven’t lost any weight and I am nauseous and have been in and out of the bathroom. I feel dreadful,” commented another user.

Negative User Reviews – “Another Big Concern”

We did see quite a few negative customer comments posted online for Zantrex. In fact, one person revealed, “Feel like I’ve wasted my money and feel sick no matter if I take 1 or 2, with or without food, I feel horrible.”

“I am just trying to finish the bottle so I don’t feel like I completely wasted my money! No energy boost, no appetite deterrent at all. I would never recommend this to anyone!,” said another customer.

The extensive research we’ve conducted has shown that if there is one aspect of a diet pill or weight-loss program that is quite concerning or difficult (side effects, negative user reviews, low Amazon rating) the likelihood of real results for the long run is minimal. So, if Zantrex does in fact result in a high number of unhappy users, this could be problematic.

What About Actual Science?

The official website for Zantrex-3 does not present any actual science to support this formula. While this supplement does contain some Green Tea and Caffeine to help boost metabolism, it’s unclear how much of these ingredients is actually used. For us at DietSpotlight, we like to see some real clinical evidence that supports the diet product and its weight-loss claims.

The Bottom Line – Does Zantrex Work?

Now the moment you’ve been waiting for: our bottom line on Zantrex. Well, we like that this diet pill contains some natural herbs and that it’s sold with a satisfaction guarantee. On the downside, we have some doubts because it’s not actually backed by any clinical studies or research. Furthermore, we’re concerned about the customer complaints regarding side effects.

If you’d like to drop more weight, then we encourage you to choose a product that does not cause any harsh side effects, is backed by solid science, is easy to use anywhere and comes with great customer service.

Among the best products we’ve seen in 2016 is one called Leptigen. This product contains a blend of four key ingredients, which have been shown in documented clinical research to help kick-start metabolism and speed up fat loss. Moreover, we can’t find any complaints of harmful side effects and customer feedback around the web shows people are seeing significant results.

The makers of Leptigen are so satisfied with their product they’re offering a Special Trial Offer, which is a good sign.

Previous Zantrex Review (Updated August 14, 2014):

What You Should Know

Zantrex-3 is a weight loss supplement that endeavors to assist with weight reduction, increase energy levels and aid the user's metabolism. This diet product sells through the official manufacturer website. However, little information is provided on the supplement via this site. Compared to other sites that we've reviewed, the official Zantrex-3 site is laid out like an infomercial or massive ad. Zantrex-3 is marketed toward both men and women and, similar to GNC Burn 60, Zantrex-3 is intended to be used in conjunction with a proper diet and a regular fitness regimen. Zantrex-3 is claimed to be Ephedra-free and is also sold in common nutrition stores. The official Zantrex-3 website does not appear to disclose how long the diet product has been on the market, nor does it offer any customer testimonials. Overall Zantrex-3 is claimed to assist with the dieter's energy levels, while boosting the immune system and curbing hunger cravings. No specific diet or exercise program is recommended. Although Zantrex-3 can be purchased online, no free trial samples are offered when ordering Zantrex-3. The official website does give a video clip advertising the dietary supplement as an energy boosting product, which we thought was an innovative form of testimonial.

List of Ingredients

There are a few primary active components found in Zantrex-3. These are Kola Nut Extract (stimulant), Yerba mate (a stimulant for the nervous system), Green Tea (helps the immune system and metabolic rates), Caffeine (stimulant) and Panax Ginseng (assists with proper blood flow).

Product Features

Zantrex-3 is a diet supplement geared toward both men and women. This product incorporates active ingredients such as Caffeine (stimulant), Panax Ginseng (assists with proper blood flow), Kola Nut Extract (stimulant), Yerba mate (a stimulant for the nervous system) and Green Tea (helps the immune system and metabolic rates). Zantrex-3 is commonly available in nutrition stores and online. Like many other modern weight loss products, Zantrex-3 is recommended for daily use. This product is not offered with a money-back guarantee.


  • Zantrex-3 can be conveniently purchased in nutritional stores or online.
  • Zantrex-3 contains some natural ingredients.
  • Zantrex-3 is Ephedra-free.
  • Zantrex-3 is sold in an easy-to-take supplement form.


  • Some individuals may have a negative reaction to certain ingredients found in Zantrex-3.
  • Zantrex-3 contains caffeine, which is known as a stimulant that can draw water off of the muscles.
  • There doesn't appear to be much clinical evidence offered supporting the effectiveness of Zantrex-3.
  • Zantrex-3 does not appear to be sold with a money-back guarantee.
  • The official Zantrex-3 website lacks convincing customer testimonials.
  • No trial sample of Zantrex-3 is provided through the official website.
  • In our opinion The website comes across like an infomercial, with little actual product info supplied.


Although Zantrex-3 makes claims to effectively aid in the weight loss process, the primary ingredients listed for this supplement appear to be mostly stimulants. Unfortunately components like caffeine are known for pulling water from the user's body, which ultimately exhausts your metabolic system. On the bright side, Zantrex-3 can be easily purchased online and in stores. However, since this particular supplement does not come with a money-back guarantee, and no free trial samples are offered online, some consumers may turn the other cheek. Considering the wide array of dietary supplements currently available these days, it's wise to consult a physician before simply choosing one like Zantrex-3.

Zantrex Questions & Answers:

We read hundreds of customer reviews about Zantrex and then wrote this FAQ.

What are the side effects of Zantrex?

Some customers complained of side effects while using Zantrex, including nausea, dizziness, headaches, redness, and stomach pains.

What are the ingredients of Zantrex?

Zantrex ingredients include yerba mate leaf extract, guarana seed extract, trimethylxanthine, damiana leaf extract, green tea leaf extract, kola seed extract, schizonepeta flower extract, black pepper fruit extract, rhodiola crenulata root extract, Asian ginseng root extract, maca root extract, cacao seed extract, and black tea extract.

Does Zantrex work?

Zantrex offers lots of clinical evidence of it working much better than Hydroxycut, Lipozene, and and “America’s #1 Selling Ephedra-Based Diet Pill”. However, if you read the fine print, the studies for Zantrex were done on the primary ingredient compared to the other products with one of their ingredients. Additionally, Zantrex states at the bottom of the study that the main ingredient in Hydroxycut basically causes the same rate of weight loss as the main ingredient in theirs.

If you are looking to try a weight-loss supplement without the fuss, you may want to look at Leptigen.

How much does Zantrex cost?

For a bottle of 84 capsules, Zantrex costs $29.99.

How should I take Zantrex?

Two Zantrex capsules should be taken with a full glass of water before your main meals.

Can I take Zantrex if I have a health condition?

Before using Zantrex, consult your physician, especially if you are suffering from any health condition, under the age of 18, nursing, or pregnant.

What do users like about Zantrex?

According to some dieters, they like Zantrex natural ingredients and readily available scientific studies.

What do users NOT like about Zantrex?

Some customers complained that Zantrex seems cheap, but actually has a building cost.

How do I contact the Zantrex customer service department?

You can contact the Zantrex customer service department by filling out a form on their website or calling them at 1-800-898-5153.

What is the maximum amount of Zantrex I can take in a day?

The manufacturers strongly suggest that you do not take more than six Zantrex capsules in a 24-hour period.

Can I still consume caffeine while using Zantrex?

Although you can still consume caffeine, Zantrex makers suggest limiting intake due to the large amount already found in the supplement.

What I the different between the red and blue Zantrex bottle?

The blue Zantrex bottle is called Zantrex-3 while the red bottle is named Zantrex-3 High Energy Fat Burner. The latter is more expensive and contains more caffeine.

Does Zantrex come with a guarantee?

Zantrex offers a 30 day money back guarantee with valid proof of purchase.

Do you know of any special deals or discounts on Zantrex?

The makers of Zantrex offer special deals only when you buy multiple bottles of their supplement. Before you head over to their website though, you may want to check out Leptigen. They are offering a Special Trial Offer customers cannot get enough of. Click here to learn more.

  • References
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Zantrex Side Effects:

Zantrex Black has mixed feedback from users. Many people report side effects, which should raise red flags. Because you never know how your body may respond to a new supplement, you should take all risks into consideration.

Rapid heart rate

A number of users indicate that their heart started beating rapidly upon using this product. Rapid heart rate, or tachycardia, is problematic because it keeps blood from flowing properly throughout your body. Without this blood, your tissues and organs won’t function right. Signs of rapid heart rate include dizziness, shortness of breath, and chest pain.

What causes rapid heart rate?

High blood pressure, hyperthyroidism, tissue damage, and excessive alcohol use are common causes of rapid heart rate. [1]


Headaches can be very discomforting and make it hard to go about your day. Some headaches are mild. They create a sensation of tightness or pressure in your head. Others are more intense, like a stabbing or piercing. Serious headaches can even provoke dizziness and loss of balance. You may simultaneously experience sweating and malaise.

What causes headaches?

Conditions like concussion, glaucoma, and high blood pressure are known to cause headaches. Most headaches, however, are not serious. It may be that you haven’t been drinking enough water, getting enough sleep, or eating enough.

Stomach Pain

It’s not uncommon for you to become nauseous and bloated when you have stomach pain. In some cases, you can physically feel your stomach tighten up. You may also be suffering from fever and sweating. You get light-headed and physically weak.

What causes stomach pain?

Indigestion and pelvic inflammatory disease are among the top causes of stomach pain. [2] You may also have a food intolerance or allergy. Always check whether your food is spoiled. And be sure to wash fruits, vegetables, and meats. This reduces the chances of getting a stomach virus or bacteria.


Diarrhea can be very painful and uncomfortable. It makes you run to the bathroom every few minutes. Your stool is watery and liquid. Because of the constant bathroom trips, your rectum gets sore. The constant expulsion of liquid leaves you vulnerable to dehydration. Also, you might get weak because your body eliminates its nutrients.

What causes diarrhea?

Diarrhea may stem from a case of irritable bowel syndrome or food poisoning. It can also be a symptom of fever. Many stomach viruses and bacteria provoke diarrhea. Parasites can also cause diarrhea, but they’re less common in developed countries.

Not everyone who uses Zantrex Black experiences side effects. To be safe, you may want to consult with your doctor about the risks of using this product.



7 Top User Tops



Zantrex is a stimulant-based weight-loss supplement with some ingredients with a connection to boosting metabolism. We looked everywhere for information on side effects. We found a few, but they are rare.


“I have been taking it for about 2 weeks now and have never felt so sick in my life. Dizzy, nauseous, headaches.”    Kayla


“These pills are horrible. My body completely broke out in hives… My skin was on fire for the first 20 minutes after taking them. They gave me a headache. HORRIBLE.”    Lori


“I took the Zantrex and broke out in horrible hives. Horrible stomach pain and feeling like I was going to pass out.”    Jenna


“I took the pills this morning and within 30 minutes felt awful! I felt like it was hard to breathe, my stomach cramped and I felt nauseous.”    Jill


“I had trouble with nausea and stomach discomfort when I took it.”    Keely


“It did make me feel a bit nauseas if I took one on an empty stomach.”    Ava


“Do not ever take this on an empty stomach. You will feel awful.”    Scott


“I feel very weak then very hyper, my heart is beating really fast I’m dizzy and lightheaded.”    Denise


“Twice it made my heart rate so fast and rapid it was dangerously fast.”   Asia


“I took one today at 1pm it’s 4am now and I’m still awake! My heart is beating like a hundred miles an hour.”    Missy


“Made me sick to my stomach. Returned after one use.”    Sheila


Stimulants are a good option for a weight-loss product, but too much can increase your risk of side effects. We like Leptigen, which is made with caffeine and green tea (with other clinically tested ingredients), because it contains just enough. We found some amazing reviews and that’s the real test of effectiveness.

Click here to learn more about Leptigen today.

Zantrex Ingredients and Supplement Facts

Serving Size:
Serving Per Container:
Amount per Serving % DV

Other Ingredients: None

We researched Zantrex ingredients in order to give you the information you need.


Niacin, also known as vitamin B3, is important to overall health. It is one of the eight B vitamins needed for general health.

What Is It Supposed To Do?

Niacin, like all B vitamins, plays an important role in converting food to energy. Specifically, it can help create sex related hormones and can aid in the suppression of inflammation.

Clinical Research

According to the University of Maryland Medical Center, niacin may play a role in the treatment of diabetes. In the article, they wrote, “Researchers have also looked at whether high-dose niacinamide might reduce the risk of type 1 diabetes in children at risk for the disease. One study found that it did. But another, larger study found it did not protect against developing type 1 diabetes. More research is needed.” However, later on, they also mentioned, “…niacin may also raise blood sugar levels, which is particularly dangerous for someone with diabetes.”

You may want to try Leptigen, a weight-loss supplement that has four clinically tested ingredients, plus user reviews that show amazing results.

Yerba Mate

Yerba mate can be found in many weight-loss supplements. It is particularly popular in Brazil, Paraguay, and Argentina. It is also consumed as a tea.

What Is It Supposed To Do?

Yerba mate is usually consumed to treat fatigue, heart failure, low blood pressure, urinary tract infections, kidney stones, and obesity, based on ancient and current medicine.

Clinical Research

According to a study published in Korean Association for Laboratory Animal Science: Laboratory Animal Research, “This study found that Yerba Mate extract has potent anti-obesity activity in vivo [in animals].” These tests were performed on mice, so effects on humans may be different. More research needs to be performed.

Guarana Seed Extract

Guarana is a plant that became popular after it became known that the Guarani tribe in the Amazon brewed it for a weight-loss drink. It can now be found in many supplements and medicines.

What Is It Supposed To Do?

Guarana seed extract is thought to help treat fatigue, obesity, low blood pressure, diarrhea, heart problems, fevers, headaches, and joint pain.

Clinical Research

According to a study published in the Journal of Dietary Supplements, “We concluded that the weight stabilization and increased appetite that we observed in this study justify further studies of guarana in this [anorexic] patient population.” In this case, guarana was used, successfully, to increase weight and heighten appetite.

Is There Anything Out There That TRULY Works?

One of our top rated supplements for this year is one called Leptigen. Customers are going crazy over the Special Trial Offer being made available to everyone. We think you should try it, especially since we keep seeing positive reviews, especially about the clinically tested formula. Click here to learn more about this product.

  • References
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Dietspotlight Author
About the Author:

Summer Banks, a content strategist at Leptigen, has researched over 5000 products in the past 10 years. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

Rating: 3.9. From 34 votes.
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User Comments (36)


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I loved Zantrex 3 (blue bottle) it gave me so much energy & I did notice I was looking decently slimmer after taking it for about 2-3 weeks. Felt great. I just recently bought Zantrex 3 – Fat Burner (red bottle) & I feel horrible. sad I actually feel tired and nauseous after I take it. I am taking 4 pills a day (because I reacted so well to the original Zantrex 3.) I’m going to try cutting down the dosage & try to drink more water, but still confused why I get tired??? If anyone has any suggestions please let me know. I bought two bottles & really hope I’m not disappointed… I’ve only been taking it for 3 days so hopefully my body will get used to it… Still don’t understand the constant fatigue though, I mean its loaded with caffeine!! Please help..


It does seem to curb my appetite though. But feeling tired and nauseous don’t make me feel like doing anything!


I think ever person have different body


Zantrex-3 was great I exercise with extreme energy and lost a few lbs. No uncomfortable side effects. I’m still taking the product. I’m 58 years young. Go for it.


I’ve been taking it for 2 weeks. I don’t know that it has helped me lose weight, but I have been suffering severe pain for over a year.The morning after I started Zantrex 3(red bottle) I had NO PAIN! If I never lose weight I don’t care. I haven’t found anything that did this for me so I will continue to take it for that reason alone. If I lose weight its an added bonus. Also, I have had no side effects at all.


I too was a little afraid to take zantrex, but I can truly say that it didn’t make me nauseous at all, no headaches,although; I did take two ibuprofen so that Iwouldn’t, the first two pills I did fill a little anxious, but I’m positive it’s due to the fact that I don’t do coffee or soda. I’m really waiting to see how much weight I’ll lose, I feel like I’ve lost at least a couple of lbs already. I wait with bated breathe. I’ll post again in a couple of weeks to let everyone know how it goes. Oh I’m a water fanatic so I’m sure it helps with nausea and eat ,just smaller potions. Good luck.


I love zantrex3 blue bottle I’ve been taking it for 2mnths I’ve went frm a size 18 to a nice 14 (I excersize an eat way different) also when I take it I hav lots of energy! ! I hav like 4 pills left… sad I hav 2 buy sum more I recomend it…..


Hello all! I am newly 18 years old I’m 5’7 and sadly 193lbs. I want to get back to my old weight at 145 lbs. I hate that I’ve gained so much weight over the years. From eight grade to senior year in high school. I just bought the red bottle and I’m pretty nervous about it because of seeing everyone’s scary stories and pissing and moaning about it. Now what steps do I need to take NOt to get sick because that’s my biggest fear. Thank you ll and I hope to hear from someone soon smile


Probably because you’re 57?


I love it .I just had my baby six month ago.day was my first day .I was not sitting down at all .I was moving a lot .my goal want to be how I was 110. Now I’m 140 .I know its a lot but I hope ill lose it all….


i am just start to talk it i took it at 430pm two more and two at 630pm i can not go to sleep it is know 330 am i am going to try 0ne and yhr moring around 800am i and one at530 i hope i can get some sleep


I think if u buy the red bottle u will go sleep.because I did went to sleep ..I think the blue is str-


zantrex is a weight loss product but it also gives you energy. the reason why you are up late is because of the medicine. It is recommended to take it in the morning because it gives you so much energy.


Today was my first day trying Zantrex-3 Blue bottle and I have so much energy!!! I had to do the mile run today and usually get 13 minutes (Not a runner) and I got 11:30 instead. Although I found it hard to consentrate on one thing because I had so much energy. One negative side effect would be nauseousness!!


After reading all of the reviews on various websites about Zantrex, it all sounded scary. I was hesitant to try it because it would be my first time using them. I took them and never felt the horrible side effects people talked about, although it made me sleepy and eat more than I should have. I don’t see a difference in weight, pounds lost. I took two fifteen to half an hour before breakfast and one midafternoon with a late lunch. I already do the Insanity workout and walk 3-5 miles a day, I needed that extra oomph to lose pounds faster but Zantrex doesn’t do anything for me. I’ll finish up the bottle I purchased and just stick to my Insanity workout and walks.


Im taking zantrex3 (red bottle) and doing insanity and also keeping track on how many calories im eating and so far I have lost 4 pounds in 4days. Thats 1 pound a day and the energy it gives me is amazing. I have not felt any of the side effects that people on here have been talking about. I love this product. You have made me one happy ass customer!


Hello. Your stomach may not be able to handle the caffeine in it. I take 2in the am then eat about 15-30mins after then I take 2in the afternoon and do the same. Everyone is different. Which bottle are you taking (red or blue)? I tried both and I like the red ones. Good luck with taking them if you still are. Also make sure u drink a lot of water. I drink about 64-82 oz of water a day.


Sorry my respond was to caitlyn


I have been take Zantrex 3 for almost a week now. I started out the first 2 days taking 2 pills a day one in the morning and one in the afternoon. with no difference noticed I upped the dosage to 4 pills a day. 2 in morning 2 in afternoon. I still have no energy. Havent lost any weight and I am nauseous and have been in and out the bathroom. I feel dreadful. Any suggestions as to why I feel like this?


Hello read below. I tried replying to your post and it got messed up. Thx……Dana


I just started taking this. I believe its been 2 days now. For me it already works. I’ve already lost weight. Not sure if that’s due to the excessive pooping OR the lack of appetite though.


Well it has wiped out my hunger pangs tbh the thought of putting food in my mouth makes me feel I’ll. I’ve been on it 3 days and I feel dreadful so nauseous and a headache from the pills I don’t think it’s worth the side effects I’ve spent all the 3rd day in bed and I’ve only had 2 tablets this morning I couldn’t face having anymore and after eating I feel shocking.


i want to try this product so bad but im scared ??is it good or bad for someone


I havent experienced any side affects at all. I have been taking this for 2 weeks. Works wonders


Although this product has given me major energy, I have been running to the bathroom all day long after taking it for 2 days, I thought i was passing gas and poop’d on myself at work, which made me come home to do a search for more details ( tmi but the truth)


I cant believe you actually said that. I laughed so hard. It made my day, thanks.


Witch Zantrex works better the red bottle or the blue bottle?


I took Zantrex and i lost 81 lbs it most definitely works and it will give you a energy boost while curving your appetite. So dont take Zantrex before bed or you will be up all night

mary beckett

i take them on a empty stomach n they make me sick why


Because you are suppose to take them when you eat a meal