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

Viper Review - Does This Fat Burner Work?

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By Summer Banks Mar 18, 2017

You may be surprised by what’s said in this Viper review. We took the time to analyze the ingredients, side effects, scientific research and quality of customer service. In addition, we concentrated on hundreds of consumer comments. Then, we summarized and condensed to give you the info you need.

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

What You Need to Know

To start, Viper is a fat burner containing caffeine, synephrine, theobromine, guarana seed, phenylalanine, xanthine, zingiber, cayenne, yohimbe hcl, bioperine, maximowizia chinensis, phaseolus vulgaris, r-alpha lipoic acid, guggulsterones, rhodiola rosea root, tyrosine ethyl ester, l-carnitine, thiamine disulfide and thiamine trisulfide. The recommended serving is one capsule per day, which may promote weight-loss. You can use the supplement on the go, a positive.

There’s limited information about when Dymatize Nutrition introduced Viper, but the business was founded in 1997. You can no longer purchase the supplement on the official website, but you can visit other online retailers. We like that the company includes a few natural ingredients and that we located some favorable customer comments, but read on…

Ineffective – “Any Results?”

The first negative aspect with Viper ingredients was ineffectiveness. “You’ve headed into the store and purchased a supplement that you’re willing to give a try,” said our Research Editor. “Only this time you don’t see the results the company claims. That could be quite the problem.”

“Really didn’t care for this product. Not a whole lot of energy and overall left me feeling drained most of the day,” commented a customer.

“This product did next to nothing for me. Maybe a small energy perk, but other than that nada,” stated a user.

Side Effects – “Feeling Bad”

We also found that dieters tell quite the story about Viper side effects. “If you don’t mind feeling dehydrated and having a kind of shaking feeling after a workout, this is a great product to try,” reported a user.

“It increases your heart rate, being inactive makes you feel kinda sick,” commented a consumer.

We’ve researched hundreds of supplements and we’ve found that something minute, like a simple side effect, could derail long-term success. If Viper causes reactions, will dieters continue to use it?

Is the Science There to Back Up Claims?

Based on the official Viper website, the product is tested by a team of scientists, but there’s no published clinical research supporting weight-loss claims. There are studies proving the effectiveness of caffeine, but none that prove this formula is any better than other caffeinated supplements. At DietSpotlight, finding science is critical. If a company can’t provide proof, there’s a concern.

The Bottom Line – Does Viper Work?

Is the car engine revving for this one? We’ve conducted the research on Viper and here are our findings. We like that we found some positive customer comments and that the company has been operating for years, but we are hesitant about recommending a supplement not supported by clinical studies. Additionally, we’re concerned about the product not being effective and that there are potential side effects.

If you’re at the point that you want to lose more weight, we suggest trying out a supplement that offers clinically proven ingredients that have no side effects to worry about.

Among the best products we’ve seen this year is one called Leptigen. The supplement contains a formula consisting of a four-ingredient proprietary blend, which published scientific research has shown helps to boost metabolism and ignite fat loss. There’s no talk of harmful side effects and from customer comments on the web, we found people are noticing excellent results.

Plus, the company behind Leptigen is confident enough in the formula to offer a Special Trial Offer, which is a good thing.

Previous Viper Review (Updated May 8, 2014):

What You Should Know

Dymatize supplement company is the creator of Viper fat burner. The supplement is listed on the Dymatize official website with an ingredient list and pricing information. Dieters have the option of ordering from Dymatize directly. Viper is a steady release supplement taken two times a day for constant fat burn.

List of Ingredients

Vitamin B12, Cocoa Extract, Xanthine, Synephrine, Guarana Extract, Phenylalanine, Zingiber, Cayenne, Bioperine, Maximowizia Cinesis Extract, Phaseolus Vulgaris Extract, R-Alpha Lipoic Acid, 5-Hydroxy L-Tryptophan, Guggul Extract, Rhiodiola Rosea Root Extract, Tyrosine Ethyl Ester, Sophora Radix, Rauwolfia Serpentine, Thiamine Disulfide and Thiamine Trisulfide.

Product Features

All ingredients, aside from the Vitamin B12, are part of the Multi-Phase Proprietary Matrix. When ingredients are listed as proprietary, the dieter is given a milligram total for all ingredients, not each one individually. This can leave the dieter questioning how much of each ingredient included in the supplement. The first four ingredients are part of the Dyma-CocXan complex and of these ingredients, the most interesting is synephrine. Synephrine is a stimulant linked to various health related issues. Synephrine is used in many supplements to replace banned weight loss ingredients from the past, such as Ephedra, but is not considered a safe alternative to these ingredients. Maximowizia Cinesis Extract is another interesting ingredient. There is no information online about the ingredient or the effects in the body. No so much as one result came up with an Internet search. Dieters should be wary of any supplement that includes ingredients unknown and without proper research and information. Guarana is the final punch on the ingredient list. Guarana is a caffeine-based supplement and when added to any supplement that contains synephrine can create an uncomfortable rise in heart rate. When heart rate speeds, nausea and jitters can result. This can leave the dieter feeling uneasy and shaking all day. Depending on when the final supplement dose is taken, sleeplessness can also result. Viper sells for $49.99 per 40-count box. Two capsules are suggested every day. With a two capsule dosage, one box will last less than a month making this supplement higher priced than comparable fat burners.


  • Guarana is a caffeine-based stimulant that will increase metabolism.


  • Multiple stimulants can cause adverse side effects.
  • Synephrine may not be a safe weight loss ingredient.
  • Viper costs more than $50 per month.
  • Nearly all ingredients are part of a proprietary blend.


Safe and effective weight loss results from life changes and proven fat burners. Viper includes a number of unknown or unsafe ingredients for the dieter. Fat burners do not have to leave the dieter feeling nervous, jittery or unable to sleep and these all could be a result of taking Viper. In addition to the heavy stimulation, the cost of Viper is far greater than many safer alternatives.
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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.

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User Comments (2)


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Do not use this, currently shaking my life away at my desk, my heart is pounding like crazy. No way this is no good.

Tim O'Hara

What are all the possible side effects of Viper?