Updated: 05/24/2016 - Website operated by Leptigen

Mannatech Review - Do These Supplements Work? Are difficulty ordering and lack of results deal breakers?

Editor's Review: 3.5 / 5.0
Mannatech Review

Why is it that so few diet products are backed by science? Let’s see if Mannatech is one of the good companies. We look at supplement ingredients, side effects, clinical research and customer service quality. We searched for user experiences, though we only found a few. Then, we gathered and summarized to give you the bottom line.

EDITOR'S TIP: Substitute Mannatech with a proven fat burner such as Leptigen for better results.

What is Mannatech?

First off, Mannatech is a company that sells supplements, skincare, targeted health and home items. Using the products is supposed to curb appetite, fight fat and increase energy. Customers will have to check out the labels to see just how to take each formula.

Mannatech, an MLM company, purchased the official website in 1999 – that’s ages in this business. You cannot order online unless you have a reseller’s “number”. There is also the option of calling the customer service department. We like that supplements seem to cover every need in weight-loss, but read on…

Ordering – “Not Today”

The first issue we feel needs attention is difficulty ordering Mannatech products. “In order to buy anything you have to locate a “number” from the person who referred you to the company,” says our Research Editor. “Isn’t that an inconvenience for the dieter?”

According to the official website, “I don’t know my friend’s account number. Now what? You’ll need the number so we can make sure you’re connected to the friend who referred you. So all you have to do is get his/her number, come back to this page.”

Results – “Not for Every User”

There are both positive and negative reviews out there for Mannatech products. We were only able to find a few because you can’t order outside of the official website.

“The placebo affect is in full force with people who claim these great results with this product,” one person said.

Another user didn’t agree, “I can see my health condition has been improved.”

After years of dedicated research, we’ve found it’s the smallest of things, like only finding a few reviews, that can ruin your chances of success. If Mannatech is relatively unknown, the dieter may just take their money and spend in on a clinically tested supplement.

The Science – “Any Validity?”

If you’re looking for Mannatech to provide you with clinical research, you’ll be there a while. The official website offers too little information as it is, let alone specifics like that. We couldn’t even find the complete list of ingredients without first downloading a file. Here at DietSpotlight we want science to back up a product line’s claims. This company doesn’t give us that.

The Bottom Line – Does Mannatech Work?

Have we decided to find a Mannatech reseller? Well, we like that the website is clean and easy to navigate and the line does cover appetite and metabolism, but we are hesitant to give the green light. You can’t buy directly from the company, which makes it extremely difficult for the dieter. Also, we found reports that some of the products didn’t work as claimed.

If the time’s come to shed those extra pounds, we suggest trying out a supplement that’s clinically tested from a company that allows you to purchase direct – without a middle man.

Among the best products we’ve seen in 2016 is one called Leptigen. The label shows four ingredients and we found all in published clinical testing. The reviews across the web show some amazing results and there are few, if any, side effects to worry about.

Plus, we like that the makers of Leptigen are confident enough to offer a Special Trial Offer.

Learn More About Leptigen »
GD Star Rating

How Does Mannatech Compare?

Previous Mannatech Review (Updated December 29, 2011):

What You Should Know

Click Here To See Our Highest Rated Review

Mannatech is a science-based supplement company that sells “real” products. There are six supplements in the weight loss category of Mannatech. Some clinical studies have been completed on the supplements, but the small note at the bottom of the page tells us the company paid for some of the studies. When Mannatech writes the check for a study, the results mean nothing. Outside, third-party studies published in peer-review journals are the only ones that matter and those are hard to find. Most supplement companies are willing to forego research for a chance to sell more products with creative descriptions and outrageous promises.

The weight loss products sold by Mannatech include Accelerator 3, AmbroStart, Empact, FiberSlim, GlylcoSlim and OsoLean.

List of Ingredients

International Company specializing in health, weight, fitness and wellbeing supplements.

Product Features

None of the supplements sold by Mannatech appear to have green tea or caffeine. These are the two most important weight loss ingredients for dieters because they are proven in human clinical trials to increase metabolism and weight loss. We like the idea of using other ingredients, but the base needs to be made with proven fat burners and Mannatech does not do that.

The “loss” supplements are nothing more than multivitamins and fiber supplements. Mannatech even uses fructose, or fruit sugar, as an energy booster. As dieters know, eating sugar causes sugar cravings and weight gain. Dieters don't want to take a weight loss supplement and then feel hungry.

Mannatech lacks what the more popular manufacturers have – proof. There are no testimonials, before and after photos or clinical studies (not paid for by the company.) There is a bit of science behind some of the supplements, but that is not enough to increase weight loss or sell the product to a dieter looking for a strong, proven fat burner.

See Our Featured


  • Ingredients for all the supplements are available online.
  • Lower prices are available or “associates.”


  • Products are much more expensive than other companies.
  • Some of the studies are funded by Mannatech.
  • The website is difficult to navigate and there is very little information on the supplements.
  • No testimonials or before and after photos.


We are not sold on Mannatech Science. The team may understand how to formulate a new product, but the science is just not there unless you count the studies funded by Mannatech. We need third-party studies with weight loss and that is not what Mannatech offers. Dieters should look for green tea and chromium as these ingredients are proven to positively impact weight loss and appetite. Mannatech offers no supplements with green tea.

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