• Editor Rating
  • Rated 2.5 stars
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  • Fierce Muscle Xtreme
  • Reviewed by:
  • Published on:
  • Last modified: September 15, 2016
  • Overall
    Editor: 49%
  • Effectiveness
    Editor: 52%
  • Speed of Results
    Editor: 49%
  • Sustaining Results
    Editor: 48%
  • Safety
    Editor: 51%
  • Value
    Editor: 49%

What Is Fierce Muscle Xtreme?

Fierce Muscle Xtreme is a new pre-workout supplement that uses the power of Branched Chain Amino Acids to stimulate protein synthesis, increase vascular flow, and boost energy. A single serving size is three capsules, which provides 2,400 milligrams of this proprietary protein blend. Each capsule contains the well known and scientifically researched ingredients L-Arginine Alpha-Ketoglutarate (AAKG), L-Arginine Ketoisocaproate (A-KIC), L-Ornithine Alpha-Ketoglutarate (OAKG), and L-Glutamine Alpha-Ketoglutarate (GKG).

When an athlete takes this supplement, these proteins immediately go to work preparing the body for exercise. Thanks to the increased energy, blood flow, and improved hormone levels, individuals can expect to work out harder and more frequently. This leads to better results both in the short and long term, including fat loss, muscle gain, and an increase in overall strength and stamina.

Currently, a risk-free trial of this supplement is being offered on the manufacturer’s website, which allows individuals to try it before committing to a full-price purchase. For just the cost of shipping and handling, athletes can sample this supplement for up to 14 days before they are automatically enrolled in and charged for a monthly subscription service. Users report that this supplement works quickly, so users will have plenty of time to judge the supplement before they decide whether to cancel or accept the subscription.



This pre-workout supplement is manufactured by the eponymous Fierce Muscle Xtreme LLC, which specializes in selling bodybuilding supplements. This company is located in the United States, with a mailing address and, presumably manufacturing facilities,in Virginia Beach, Virginia. However, according to its Terms and Conditions page, it is incorporated under Florida state laws, and its corporate location is in Palm Beach, Florida.

Since it is a fairly new company, there is not a lot of information that is currently available about its history and ownership. There is no record of a supplement company called Fierce Muscle Xtreme LLC on Better Business Bureau website, although there are other unrelated companies with similar names. There are also no current complaints listed for this company, and no record online of it being the subject of any complaints or grievances.

There are a number of reviews, postings, and even videos online about this supplement, which are generally positive and give no complaints about the manufacturer. The manufacturer’s website also has a very thorough Terms and Conditions page, which outlines all of the legal and professional guidelines and policies used by the company. Customers are encouraged to read these policies carefully and to call the toll-free customer service phone number that is provided if they have any further questions.


How Fierce Muscle Xtreme Works?

There are four key ingredients in Fierce Muscle Xtreme, each of which is a powerful amino acid designed to improve athletic ability. These amino acids work to prepare an athlete’s body for better performance by stimulating protein synthesis, improving vascular flow, balancing hormones, and increasing the metabolization of nitric oxide. All of these ingredients have been studied by reputable scientific institutions, and the results of those studies have been published in peer-reviewed scientific journals.

Individuals are instructed to take two to three capsules of this supplement a short time before working out, preferably with a healthy meal. This gives the pre-workout supplement time to be digested and the nutrients time to be fully absorbed by the body’s tissues. Users report that they can feel the effects of these supplements approximately 15 minutes after taking them.

Thanks to the increase in available proteins and nitric oxide, as well as the improved air and blood flow, athletes are able to work out harder, lift more, and exercise for longer periods of time. This allows them to get greater results with continued use. Regular users report that they see an increase in muscle mass, decrease in fat, and improvement in strength and stamina after about two weeks of continuous use, with some results seen sooner.


Ingredients of Fierce Muscle Xtreme

There are four key ingredients in this supplement, all of which are amino acids that have been designed to improve athletic ability through various biological mechanisms. These are combined in a proprietary blend with a total of 2,400 milligrams of active ingredients. The first ingredient, L-Arginine Alpha Keto Regulate (A-AKG), can be found in numerous pre-workout supplements and has an excellent reputation amongst bodybuilders and other athletes. This ingredient has proven effects on the production and metabolization of nitric oxide and has been shown to increase protein synthesis.

The next ingredient in this proprietary blend is L-Arginine Ketoisocaproate (A-KIC), a branched-chain amino acid that is said to improve strength and minimize recovery time. L-Ornithine Alpha Keto Regulate (O-AKG) is included to promote muscle growth and naturally balance healthy hormone levels in athletes. Finally, there is L-Glutamine Alpha Keto Regulate (G-AKG), another ingredient that is commonly used by bodybuilders, and which is essential for protein synthesis and said to help athletes gain muscle mass and strength. All of these amino acids are also useful for treating any deficiencies that an athlete may be suffering from, whether due to age or illness. All of these ingredients have been proven safe for consumption by healthy adults, and their effects are magnified by regular, strenuous exercise.



Fierce Muscle Xtreme has the great advantage of being easy to use and appropriate for use by all healthy adults. There are no powders to mix, beverages to drink, or complicated regimen of supplements to remember to take. Instead, athletes just take two to three capsules about 15 minutes before they start to work out, and they should feel the effects soon afterwards.

Another advantage of this supplement is that all of its ingredients have been scientifically studied and the research published in journals that are available online. Each of the ingredients works in a slightly different way to improve athletic abilities, including vascular and blood flow, natural testosterone levels, and nitric oxide metabolization. Users who would like to learn more about these ingredients can simply search PubMed for the relevant scientific journal articles.

The greatest advantage to this supplement is probably that it can be tried risk-free for up to 14 days, thanks to the offer currently advertised on the manufacturer’s website. Individuals who order this pre-workout supplement online can try it for up to two weeks without being charged beyond the initial shipping and handling fees. If the customer does not call to cancel the auto-subscription within 14 days, they are conveniently shipped another bottle of the supplement every month and charged full price unless or until the subscription is cancelled.



According to the website, Fierce Muscle Xtreme is manufactured and distributed in the United States of America, which means it is subject to US rules and regulations. Like all supplements, it is produced under the purview of the Food and Drug Administration (FDA), which ensures the safety of the ingredients that are used. It is also manufactured in facilities that are in compliance with all US workplace safety and health regulations, including those set out by the Occupational Safety and Health Administration.

These supplements are also made using Good Manufacturing Practices, making them GMP-certified. These standards ensure that the supplements are made using high quality ingredients that have been deemed safe and effective. They also guarantee that the label on the supplement accurately reflects the ingredients inside, both in name and quantity.

The best evidence of this supplement’s quality, however, is most likely the risk-free trial that is offered through the website. This trial allows individuals to take the pre-workout supplement for up to 14 days before they are enrolled in an automatic monthly subscription program, which will provide them a continuous supply of the product at full cost. Since this supplement is designed to work fast, with full results evident by the end of two weeks, users will be able to make an educated decision before committing to its long-term purchase and use.



Recently I’ve been feeling out of energy and have gained some flab around my belly. I knew I had to exercise more, I just didn’t have the energy to do it. Fierce Muscle Xtreme has changed everything! I just started taking it but have already gone to the gym and can’t wait to go again.

– Ed T., Philadelphia, PA, US

I’ve been taking this for about a week now and can really feel a difference. Makes me able to lift more and keep going longer. It’s really use to use, too, I just pop a couple capsules with a protein shake before I lift. I’m going to keep taking it for at least another week to see if it keeps working.

– Hayden L., Charlotte, NC, US

I’m so happy I found this. I go to the gym regularly but hit a plateau and just couldn’t make any progress. Started taking Fierce Muscle Xtreme a month ago and I love it. I’ve lost fat and gained muscle. It’s already noticeable and I’ve gotten a bunch of compliments!

– Lance P., Columbus, IN, US

I’ve tried a lot of pre-workout supplements and this is one of the better ones. I got the trial bottle and am satisfied with the results so far. I haven’t determined if I’ll continue using it in the long-term, but so far it’s alright. I feel more energized and psychologically ready to exercise hard.

– Keith M., Sacramento, CA, US


Awards & Media Coverage

Fierce Muscle Xtreme is a relatively new pre-workout supplement, and does not have a long history of coverage in either online or print media. It has been the subject of some reviews on personal fitness blogs and bodybuilding forums. There are also a few YouTube videos that document users experiences with the supplement and its effects. Most of the reviews are positive, although some pages express skepticism about the quantity and quality of the ingredients.

The ingredients in Fierce Muscle Xtreme, on the other hand, have received a lot of media coverage and have been the subject of many peer-reviewed studies. L-Arginine Alpha-ketoglutarate has been reported on by Men’s Fitness and WebMD, and was the subject of a paper by the Institute for Ethics and Emerging Technologies about its anti-aging properties. L-Arginine Ketoisocaproate has recently been discussed in Nutrient Journal and in a study published by the National Center for Biotechnology Information about its effects on exercise.

L Ornithine Alpha-Ketoglutarate, another ingredient in this supplement, has been the subject of studies published in the National Center for Biotechnology Information and the Journal of the American Heart Association. The final ingredient, L-Glutamine Alpha-Ketoglutarate, is less well known than the other ingredients, but has been covered by The Huffington Post and Muscle and Fitness. All of the ingredients have a long, established track record of being used in other sports nutrition and bodybuilding supplements that have been the subject of research and reports.


Money-back Guarantee

The makers of Fierce Muscle Xtreme state on their website that they guarantee 100% satisfaction for all of their products. Any customer who is interested in a return or refund is instructed to call the toll-free phone number that is listed on the website. Presumably, customers would then send their bottle back to the Virginia Beach address, although their is no specific mechanism for the this, and it is unclear if returns are accepted at all.

Rather than a generous return policy, the manufacture offers a risk-free trial, which allows customers to have a sample bottle to use for 30 days. If the customer is satisfied with the product and does nothing, he will be automatically enrolled in a subscription surface that will send him a monthly supply of the supplement. If the customer cancels the subscription within the first 14 days after placing the order, he can keep the free bottle with no further charges.

The initial shipping charges, which are a flate rate of $6.95, are not refundable, even if the subscription is cancelled. Similarly, customers who cancel the order for four magazines will continue to receive them for 90 days. Any refund will be credited back to the original source of payment.



For customers who request a risk-free trial bottle, the shipping and handling charge is a flat rate of $6.95, regardless of the address that it is being sent to. Deliveries can be sent to Post OFfice Boxes, rural route addresses, and Military APOs and FPOs, in all United States states and territories. Shipments are sent by standard mail by the United States Postal Service (USPS). Shipments are typically sent out within one business day of order being submitted. The estimated delivery time is 3-5 business days, although the distributor is not responsible for any delays in transport.

After the 14 day risk-free trial ends, customers will be automatically be billed $119.46 for the next delivery of the supplement, which includes the cost of shipping. Customers are also automatically enrolled in subscriptions for four magazines, and are charged an initial $1 fee for shipping and handling, although this can be opted-out of by checking a box on the initial order form. Customers who have questions about the shipping and delivery process are encouraged to call the customer service department.


Customer Support

Customers have three clear options for contacting the customer service department of Fierce Muscle Xtreme LLC. The easiest and preferred method is to call the toll-free phone number that is listed on the website. It is unclear how frequently this phone number is staffed, so customers are encouraged to call during regular business hours. Similarly, customers may want to avoid calling on weekends and holidays, since there may not be any staff present on those days. Otherwise, this phone number is appropriate for all concerns, including questions about ingredients, issues with deliveries, or cancelling the automatic subscription.

For other inquiries, customers can contact the company through its email address, which is also found on the website. Customers should expect a prompt reply from a customer service agent who can address their concerns. There is also a mailing address that is located in Virginia Beach, Virginia, although it appears that the company is incorporated in Florida. Australian customers also have another toll-free number that is especially for them, which they can find on the Terms and Conditions page.


Safe & Secure Checkout

Individuals who purchase Fierce Muscle Xtreme through their website are assured that their checkout is both safe and secure.
The page on which the order form is found is protected by 126-bit Secure Socket Layer (SSL) encryption, which is the standard for online shopping. It is also has a valid, secure server certificate, so that customers’ personal information is held securely. The Transport Security Layer (TLS) connection to the payment page uses a strong protocol version and cipher suite, which protects credit card information even further.

The website also clearly outlines their corporate Privacy Policy, which tells customers what information is collected and how it is used and secured. This policy states that they do collect a good deal of information, both personal information that is entered into their ordering forms and technical information that is collected automatically from the user’s computer. The website does use cookies, and does track customers as they enter, navigate, and exit the website. Financial information, such as credit card numbers, are held securely by the Fierce Muscle Xtreme servers, and the credit card companies themselves offer another layer of protection. The company does reserve the right to share some personal information with third-parties, and customers are encouraged to read the Privacy Policy thoroughly for more details.


Pricing & Free Trial

Currently, Fierce Muscle Xtreme is offering a risk-free trial, in which up to 250 customers per day can order a bottle of the supplement for only the cost of shipping and handling. This shipping and handling costs only $6.95. If this trial is canceled within 14 days of ordering, customers can keep the bottle for that price, which works out to less than 8 cents per capsule. Along with this supplement trial, customers are also included in a Smart Retailing Subscription that initially costs one dollar, unless they choose to opt-out upon checkout. This dollar pays for four magazine subscriptions, which customers can keep for up to 90 days before cancelling, otherwise they will be charged $19.90 per month for future issues.

After the initial 14 day risk-free trial, customers are automatically enrolled in a monthly subscription, which will send them a 30-day, 90 capsule supply of Fierce Muscle Xtreme every month in perpetuity. Customers will be auto-charged $119.46 every 30 days until or unless they choose to cancel their subscription by calling the toll-free phone number that is listed on the website. This price works out to about $1.33 per capsule, or just under 4 dollars a day when the supplement is used according to the label’s instructions. Customers with any questions or concerns about pricing are instructed to call the customer service department during regular business hours.


  • Fierce Muscle Xtreme is easy to use, with just one serving of 2-3 capsules recommended before exercise.
  • This supplement provides four amino acids, all of which have been the subject of numerous studies and scientific reports.
  • Users report that the effects of this supplement can be felt right away, with even greater results after two weeks of use.


  • This supplement lacks essential macronutrients like protein and carbohydrates, as well as vitamins and minerals.
  • Since it is new to the market, there is not a lot of information available about this supplement or its manufacturer.
  • Users must exercise while taking this supplement to see the promised results.

Fierce Muscle Xtreme

Summary: Fierce Muscle Xtreme is a pre-workout supplement that is made from four powerful amino acids, specifically A-AKG, A-KIC, OKG, and G-AKG. After taking 2-3 capsules of this supplement, users report an increase in energy and stamina, which enables them to work out more vigorously and frequently. Users report that they feel the energy boost immediately and experience the full effects within 2 weeks. With regular use, individuals should expect to see an increase in muscle mass, decrease in fat stores, and improved overall athletic ability.

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RatingRated 2.5 stars

Allen Hicks is a professional bodybuilding coach and author. By using his experience, knowledge and understanding of all the intricacies regarding the fitness and bodybuilding industry, this websites delivers detailed reviews for every new supplement on the market. As an author, he may receive some small compensation for some of them, however we guarantee the neutrality regarding the evaluating of each of the products and the factuality of the information.