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

Black Jax Review - Does This Energizer Really Work?

  • 10 User Comments
  • Rating: 3.6. From 21 votes.
By Summer Banks Mar 16, 2017

We’re hearing a lot of buzz about Black Jax. We spent the time to create a comprehensive review, focusing intently on the ingredients, side effects, customer-service quality, and scientific studies. We also analyzed numerous consumer comments from all over the internet. Finally, we summarized all of the data we collected to give you the facts.

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

What is Black Jax?

To begin with, Black Jax is an energy booster. The ingredients include caffeine and a propriety blend made of yerba mate leaves, taurine, garcinia cambogia extract, capsicum annuum, and yohimbine alkaloids. The instructions on the bottle suggest taking one capsule after meals, but warn users not to take more than three in a 24-hour period.

Black Jax is made by Stacker 2. The company was created by NVE Pharmaceuticals about twenty years ago to provide herbal supplements for bodybuilders. It is now a global leader in the industry, but read on…

Side Effects– “Unpleasant”

The first concern we have is with the number of stimulants and Black Jax side effects. According to our Research Editor, “The company has elected to use caffeine as well as yerba mate, which is going to have the same effect. For those sensitive to this type of thing that could be problematic.”

A dieter claimed, “My heart was pounding so hard that first day.”

One reviewer said, “The packaging says it will give you energy but it fails to mention you won’t sleep if you take it.”

Interestingly, there were several people who liked the energizing effect.

This cheerful consumer explained, “I feel like I can do absolutely anything when I take these. I get a way better work out which is great.”

Another noted, “I’m so wired and busy when I take these that I forget to eat and lose weight.”

Ingredients– “Missing Focus”

There are no ingredients that promote fat loss or help dieters suppress their appetites.

A client noted, “I took the maximum dosage for a month and only lost a few pounds. How is that helpful?”

A customer grumbled, “This did nothing to keep me from being hungry all day. I think it actually made me hungrier.”

Not everyone minded the single focus.

One shopper mentioned, “I just need a little boost to get my butt to the gym and this did it for me. I even got to my goal weight.”

Which was similar to another who stated, “What I need is to have the energy to make healthy meals and workout at night. This does that great without all the extra ingredients.

According to our years of research, if a product comes with potential issues, like jitters or shakes, that could affect your chances of long-term results. Therefore, if Black Jax is a little too strong for many, that could be a problem.

The Science – “Unconvincing”

At DietSpotlight we expect to see research on official websites of this magnitude. It is disappointing that the company offers no insight into why these ingredients were chosen. In fact, the only information they offer at all is a long list of warnings about who should avoid their product.

The Bottom Line – Does Black Jax Work?

Should I race out for a bottle of Black Jax? If you need a boost to get you through the day, this might work. However, there are no ingredients or official documentation that suggest it would work more effectively than an espresso which is why we are reluctant to give it the green light.

If you’re ready to lose weight, we suggest choosing a product that was created to make the process easier. A weight-loss supplement should be made with ingredients that are backed by solid scientific research. The company should be willing to clearly explain the formulation to their consumers. They should also be providing stellar customer service to quickly answer any specific questions or concerns their users may have.

Among the best products we’ve seen this year is one called Leptigen. The formula contains a powerful combination of four active ingredients that have been demonstrated in clinical research to help heighten fat loss and magnify metabolism. Our investigation didn’t turn up any consumer complaints. We did find a surprising number of dieters sharing their excellent results.

The makers of Leptigen are so excited about their product that they have begun offering a Special Trial Offer, which we find to be truly remarkable.

Previous Black Jax Review (Updated March 10, 2012):

What You Should Know

Black Jax is a stimulant supplement that does nothing more than jack up your heart rate for increased energy. Of the six ingredients in the formula, five are stimulants. The sixth is thrown in there to help the other five ingredients absorb more quickly. There are plenty of people who need an extra kick of energy during the day, but this supplement packs more caffeine and stimulants than any dieter needs for an energy boost. For the dieter that wants a fat burner, this supplement will increase heart rate and that could lead to increased metabolism, but there is no appetite suppressant to counteract the increased hunger often associated with energy boosting ingredients like caffeine. However, with 250 mg of caffeine per serving, the dieter may feel nauseous so hunger may not be a problem.

List of Ingredients

  • Yohimbine Alkaloids
  • Yerba Mate
  • Guarana
  • Kola Nut
  • Capsaicin
  • Caffeine

Product Features

Yohimbine, yerba mate, guarana and kola nut are all stimulants similar to caffeine. In some diet supplements these ingredients are standardized for caffeine content. In Black Jax there is no mention of the ingredients being standardized for caffeine, aside from the tiny 3 mg noted from kola nut. This doesn't mean the stimulants are any less effective than caffeine. As a matter of fact, when combined they could be stronger than caffeine. On top of the plethora of stimulants is caffeine - the mother of all energy supplements. With 250 mg of caffeine per dose, this supplement will cause negative side effects in a large portion of the dieting population. Take into consideration the fact that over the counter anti-sleep medications contain just 200 mg of caffeine and those tend to cause nervousness and jitters. Capsaicin is an extract of cayenne pepper. This ingredient is added to increase the absorption of other ingredients. There is some evidence that cayenne pepper has some thermogenic properties.


  • Black Jax is a Stacker product.
  • Contains energy boosters just like the description claims.
  • Total amount of caffeine is listed.
  • Available online.
  • Will boost energy.


  • Not safe for dieters sensitive to caffeine.
  • May contain more than the 250 mg of caffeine noted from the other stimulant ingredients.
  • Does not contain an appetite suppressant.
  • Not designed for weight loss.


Black Jax is a stimulant by every definition of the word. If a dieter needs extra energy, caffeine is a safe alternative for most people, but taking too much caffeine can be dangerous for your health. The heart and blood pressure are affected by caffeine intake and that could mean the dieter feels chest pains, nervousness, jitters and nausea after taking strong stimulants.
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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: 3.6. From 21 votes.
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10 Comments on "Black Jax Review"


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Where can I buy them here in Las vegas, Nv.


Hi Melissa! For more information on where to purchase this product, please refer to the Black Jax official website.


They work great I take them on an empty stomach last for hours…I LOVE THEM

Your NameDee

They work great 1 can last for hrs with me. Works better for me when I to take them on a empty stomach…I LOVE THEM


I take black max for work then Advil pm to sleep. Is this combination bad for my health or life threatening?




Hello i Want to know the price for one pack of black jax aj 3850

Cletus redford

These are amazing, made me really hungry and chest started to hurt for a few seconds then that went away, all I wanted to do was get stuff done, the energy lasted for about 4-5 hours that I could really tell.


Geez i ate one at 11pm (work graveyard) then one at 3am didn’t think the first one worked took a second like stated and didn’t kickin until 5 am so if you plan to use at work eat 2 and half hours prior.

Aryan Ivey

Would you suggested eating first? I planed on taking one tonight at work