USN Muscle Fuel Anabolic Review [UK] 2023: Is It A Good Mass Gainer?

Mitchelle Morgan

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Medically reviewed by Kathy Shattler, MS, RDN

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USN Muscle Fuel Anabolic




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  • Good for muscle development.
  • Available in 2 and 4 kilograms tubs.
  • Good source of high-quality protein.
  • Good-tasting protein powder.
  • USN is a top sports nutrition brand.
  • Comes in different flavors.
  • No adverse side effects.
  • Supports muscle recovery.

Brand Information

  • Reputable sports nutrition company
  • Different sports nutrition products
  • Supports better sports performance
  • Highly qualified staff

Medical Benefits

  • Boosts immune function
  • Increases muscle gains
  • Supports muscle recovery
  • Improves athletic performance

About The Brand

Among the top sports nutrition companies is the USN, a U.K.-based company. USN offers various sports nutrition products, including protein powder, supplements, protein bars, and snacks.

These products benefit people who hit the gym and need the right nutrition. Check out the USN Muscle Fuel Anabolic, a perfect high-protein shake for boosting athletic performance and bodybuilding. Here is a detailed USN muscle fuel anabolic review.

What Is USN Muscle Fuel Anabolic?

The USN Muscle Fuel Anabolic is an all-in-one muscle fuel anabolic high protein powder. This USN product is for athletes who want to boost athletic performance. It contains a quality nutritional mix full of vitamins, minerals, carbohydrates, and protein, all crucial for muscle growth and repair when leading an active lifestyle.

USN Muscle Fuel Anabolic protein powder contains a top formulation that targets and delivers muscle development. The product’s different flavors available include Cookies and Cream, Strawberry, Peanut and Caramel, Vanilla, Banana, and Chocolate. Its current availability is limited to the 2-kilogram tub, although when in stock, they also offer a four and a 5.32-kilogram tub.

Feature Product & Coupon

USN Muscle Fuel Anabolic

Best Reputation

USN Muscle Fuel Anabolic

  • Good for muscle development.
  • Available in 2 and 4 kilograms tubs.
  • Good source of high-quality protein.
  • Good-tasting protein powder.
  • USN is a top sports nutrition brand.
  • Comes in different flavors.
  • No adverse side effects.
  • Supports muscle recovery.

Does It Really Work?

The USN Muscle Fuel Anabolic works. This is according to the product review from customers who use it. The product may improve muscle gains when you follow the recommended dosage. 

However, following the recommended dosage of two-three servings in the first five days for those over 80 kilograms of weight, you will receive up to 165 grams of protein. This load is too high for the kidneys to process healthfully and can actually lead to dehydration.

Nevertheless, it’s a good-tasting protein shake that’s easy to make. This product contains vital ingredients, including a vitamin and mineral blend. These are essential for better body function and good health. 


  • Good-tasting protein powder.
  • Works as a fat burner.
  • Comes in six different flavors.
  • USN is a top sports nutrition brand.
  • Good for muscle development.
  • Good source of high-quality protein.
  • Contains lactase, a digestive enzyme.


  • High carbohydrate and sugar content.
  • Too many ingredients that aren’t natural.
  • Contains maltodextrin, sucralose, and acesulfame-K.
  • Uses shortening powder, a source of saturated fat.
  • High sodium content of 1 gram per serving.
  • Contains gluten.

USN All-In-One Muscle Fuel Anabolic Ingredients 

USN Muscle Fuel Anabolic protein powder consists of several crucial ingredients. These include protein matrix, carb matrix, milk protein isolate, soya protein isolate, calcium caseinate, egg albumen, creatine monohydrate, cocoa powder, thickeners, flavoring, shortening powder, starch L-glycine, anti-caking agent, calcium beta-hydroxy, branch chain amino acid, magnesium lactate, tri-calcium phosphate, stabilizer, tri-potassium citrate, sodium chloride, sweeteners(sucralose and acesulfame-K), taurine, L-glutamine, vitamin blend, Avena sativa, glutamine peptide, zinc bisglycinate, anti-caking agent, and Tolerase L (pH stable lactase).

USN All-In-One Muscle Fuel Anabolic Ingredients

Creatine Monohydrate

There are 3.4 grams of creatine monohydrate in 150 grams of protein powder creatine monohydrate is one of the essential ingredients for improving weightlifting performance.[1]


USN Muscle Fuel Anabolic protein powder contains 1.1 grams of L-glycine in 150 grams. This is one of the three amino acids that make up creatine, known for improving muscle size and strength.[2]


There is 1 gram of beta-alanine in 150 grams of the protein powder. Beta-alanine[3] benefits the body by increasing the time it takes to reach exhaustion. As a result, you enjoy longer workouts.

 Calcium HMB Salt

Calcium hydroxymethyl butyrate, also known as HMB, is another crucial ingredient in USN Muscle Fuel Anabolic protein powder. Evidence shows that this ingredient can increase muscle growth[4] and reduce age-related muscle loss. It contains 1.0 grams per 150-gram serving.


USN Muscle Fuel Anabolic contains 427 milligrams of potassium in 150 grams. This is an essential ingredient that enables the body to reduce blood pressure.[5]

Other Ingredients

The USN Muscle Fuel Anabolic contains L-glutamine. This is an amino acid that improves overall immune function.[6] 

Sucralose may lower the number of good bacteria[7] in the gut and impair glucose homeostasis leading to diabetes and obesity. Acesulfame-K may also impair blood glucose levels[8] and raise blood pressure. Maltodextrin may cause inflammatory reactions in the gut[9] leading to gut dysbiosis.

Alternatives To USN Muscle Fuel Anabolic

CrazyBulk D-Bal

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  • Increases muscle gain.
  • Contains natural ingredients
  • Easy to take
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Transparent Labs BULK

Transparent Labs BULK

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  • Affordable sports nutrition product
  • Transparent list of ingredients and quantities
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MuscleTech Alpha Test

MuscleTech Alpha Test

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  • Contains quality natural ingredients
  • Reasonably priced product
  • Contains ingredients that may boost testosterone levels
  • No research is available on the website
  • No money-back guarantee

Health Benefits Of USN Muscle Fuel Anabolic

It’s important to know the health benefits to expect when taking USN Muscle Fuel Anabolic protein powder. Below are the different benefits.

Increases Workout Duration

Have you ever been working out and had to stop due to exhaustion? This can be quite draining, especially if you haven’t achieved your daily target. 

There’s evidence that taking the protein powder that contains creatine monohydrate can increase your workout duration.[10] The longer the workout duration, the better the muscle growth[11] and gains.

Reduces Blood Pressure

Millions of people in the U.S. suffer from high blood pressure. This puts them at risk of getting cardiovascular disease. The good news is increasing your intake of potassium can help reduce blood pressure.

Potassium helps the body eliminate excess sodium, which causes high blood pressure. Eating a potassium-rich diet can lower blood pressure.  A sample of 1,285 subjects was chosen to participate in a study[12] to note the influence of dietary potassium on blood pressure and sodium metabolism. The participants were aged 25 to 65 years. Folks who took foods rich in potassium experienced lower blood pressure regardless of a sodium intake of 6 grams per day.

Since this product has 1 gram of sodium per serving, adequate potassium in the formula may protect against the high sodium content.

Improves Immune Function

The USN blend contains L-glutamine, a crucial amino acid the body needs for proper immune function. L-gutamine is fuel for the body’s immune cells and white blood cells.

While the body needs L-glutamine[13] to remain healthy, it cannot produce enough to sustain demand. This is where eating foods or taking drinks rich in L-glutamine is handy. Increasing your intake will ensure your immune system isn’t compromised as you continue upscaling your athletic performance.

L-glutamine supplementation is highly recommended together with a high-protein diet.

Promotes Healthy Eyes

The USN protein blend contains vitamin A, which is crucial for eye health. The body needs continuous intake of vitamin A to guard against night blindness. Your brain receives an electrical signal when light hits the eyes at night. If you happen to be experiencing night blindness, know that you are experiencing low vitamin A intake.[14]

You can see well during the day, but your vision worsens as it gets darker. So, it is a good thing that USN Muscle Fuel Anabolic contains vitamin A.

Supports Proper Muscle Function

Perhaps one of the essential ingredients in the USN Muscle Fuel Anabolic product is creatine monohydrate. This is vital in proper muscle function support for athletes and bodybuilders.

Creatine monohydrate is vital for energy production[10] in muscle cells. This is possible because of the formation of adenosine triphosphate, essential molecules cells need for energy production. ATP formation happens when there’s an increase in the intake of creatine supplements.

In addition, creatine comes in handy when you want to boost muscle gains[15] when bodybuilding. New muscle growth takes place when there’s an alteration of cellular pathways in the body. Also, creatine is responsible for muscle water gains, rapidly increasing muscle size. When watching the scale, folks who want to remain a specific size should note this effect of creatine.

Still, creatine monohydrate may help with speedy muscle growth,[16] which increases lean muscle mass. Regular supplementation will increase muscle size and lean weight due to continuous fiber growth.

Enhances Athletic Performance

Athletes and bodybuilders know how crucial it is to get an extra workout or rep in the gym. However, it’s time to stop when the body can no longer keep going. If you feel like you can keep going longer than usual when taking USN Muscle Fuel Anabolic, it’s because of beta-alanine. This is a non-essential amino acid that enables better athletic performance.

As mentioned earlier, you can experience an improvement in time to exhaustion when training. However, it’s worth noting that it works better during short-term training. If you do high-intensity workouts, shorten the time to enjoy the benefits of beta-alanine.[17]

Improves Blood Flow

USN Muscle Fuel Anabolic 5 kilograms contains green oat extract from the unripe Avena sativa plant. One study[18] shows consumption of green oat extract can improve blood flow.

Good blood flow is vital for athletes who want to experience better performance. This is possible because an increase in nitric oxide[19] is known to cause better blood vessel dilation. 

Potential Side Effects

There are no adverse USN Muscle Fuel Anabolic side effects reported. The only issues folks may experience taking the protein shake are stomach cramps and indigestion. However, these aren’t the experiences of every person since most don’t even get these mild symptoms. Most of the ingredients to watch out for, like beta-alanine, have a low dosage and are more beneficial than harmful.

Still, even without any reported adverse side effects, it’s important to note the ingredients and watch out for any allergic reactions. However, the supplement contains sucralose and acesulfame-K sweeteners which may affect blood glucose levels and the gut microbiome. It also contains the inflammatory additive maltodextrin, which may precipitate gut dysbiosis. It also has 26 grams of sugar per serving, with the recommended[20] limit being 36 grams for men and 25 grams for women.


When taking USN Muscle Fuel Anabolic, adhering to the proper dosage is important. The manufacturer recommends three heaped spoons with 500 to 600 milliliters of water. You can also take it with milk, but remember that it will increase your protein intake even further

One heaped scoop can contain 29 grams of the product. After adding the powder to the water, shake for 30 seconds before consuming. Adding them to the blender for better consistency is also a good idea.

Keep in mind the weight recommendation by USN. Folks weighing over 80 kilograms can take two to three servings of the powder daily for five days, then one to two after that. However, if you weigh less than 80 kilograms, take two servings daily for five days. After that, stick to one scoop per day. Taking more than the recommended dosage may stress the kidneys and cause fluid imbalances.

USN Muscle Fuel Anabolic Review UK: What Do Real Users Say?

One of the best places to learn more about this product is to check the USN Muscle Fuel Anabolic review. Below are positive and negative reviews from Amazon buyers who’ve tried the product.

I used muscle fuel recently to pack on some muscle, and it did just that! It wasn’t too heavy for me and had the benefit of having a good dose of Creatine, so I didn’t need to take loads of different supports.


This is one of the only products that give me a muscular pump hours after finishing in the gym. Excellent taste, banana as it should be, not chemical tasting. Repeats slightly mixes with a simple shake, and job done. 100% recommend.

Mozzy Boy

 I’m a first-time buyer from this company, and it arrived at my house damaged with both the lid to the container broken and the seal from the side being opened and not sealed properly. I contacted support through email and wrote to them, as well as including images, and didn’t hear anything back about it. Most likely won’t be purchasing here again since the customer service is poor as well as damaged product.

Alex T

Current flavor of caramel peanut has gotten noticeably different, and the texture isn’t quite as good. No longer has a caramel flavor, it’s just overly sweet with a chemical-like aftertaste going on. Texture not quite as good as well. Price has dropped, however, so better value, just not the same quality unfortunately.

T. Davidson

Final Thought

The USN Muscle Fuel Anabolic product checks most boxes when looking for a good protein powder. This product has 55 grams of protein per 150 grams, the manufacturer’s recommended serving size. The taste is reportedly good, and there are different flavors.

However, there is some cause for concern considering the high sugar content. There are 26 grams of sugar per 150 grams of the product. In addition, the product has no slow carbohydrates and only 3.6 grams of fiber.

Still, the USN Muscle Fuel Anabolic protein blend is a good option to boost muscle growth and ensure muscle retention. Note that you may experience stomach cramps or indigestion when taking protein powders. Consult a registered dietitian before consuming the supplement.

Frequently Asked Questions

What does USN Muscle Fuel Anabolic do?

This all-in-one muscle fuel shake benefits athletes and bodybuilders. The product enables proper muscle recovery after intense training. In addition, it boosts performance and muscle growth (building lean muscle) with time.

Is USN Muscle Fuel Anabolic best for muscle gain?

Yes. The ingredients in the USN Muscle Fuel Anabolic enable muscle gain. A good example is L-glycine, which improves muscle size and strength[21] in animal studies. L-glycine is one of the three amino acids in creatine monohydrate.

Can you mix USN Muscle Fuel Anabolic with milk?

Mixing USN Muscle Fuel Anabolic protein powder with milk is safe. You can use a blender to make the mixture.

Does USN Muscle Fuel Anabolic contain steroids?

No. USN Muscle Fuel Anabolic doesn’t contain steroids. It contains anabolic whey, a high-quality protein that isn’t considered a steroid.

Does USN Muscle Fuel Anabolic make you fat?

There are 77 grams of carbs per 150 grams of USN Muscle Fuel Anabolic. However, this amount of carbs won’t make you fat. It is what the body needs to burn for fuel as you keep going with intense workouts.

When do I take USN Muscle Fuel Anabolic?

The best time to take USN Muscle Fuel Anabolic is in the morning. The high protein and carb content is a meal that keeps you going. 

+ 21 sources

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  2. Caldow, M.K., Ham, D.J., Trieu, J., Chung, J.D., Lynch, G.S. and Koopman, R. (2019). Glycine Protects Muscle Cells From Wasting in vitro via mTORC1 Signaling. Frontiers in Nutrition, [online] 6. doi:
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Mitchelle Morgan

Medically reviewed by:

Kathy Shattler

Mitchelle Morgan is a health and wellness writer with over 10 years of experience. She holds a Master's in Communication. Her mission is to provide readers with information that helps them live a better lifestyle. All her work is backed by scientific evidence to ensure readers get valuable and actionable content.

Medically reviewed by:

Kathy Shattler

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