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F-BRN Komplex Review 2023: Does This Fat Burner Really Work?

Mitchelle Morgan

Updated on - Written by
Medically reviewed by Dr G. Michael DiLeo, MD

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F-BRN Komplex




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  • A fat-burning supplement
  • Claims to help boost metabolism
  • Reduce your appetite
  • All-natural ingredients
  • Free shipping
  • 30-day money-back guarantee

Brand Information

  • The manufacturer is GetFit Fitness
  • The company is German

Medical Benefits

  • Help with weight loss
  • Boosts your metabolic rate
  • May support digestion
  • Suppresses appetite

About The Brand

GetFit Fitness F-BRM Komplex is an all-natural formula with only seven ingredients. The company claims that the seven natural ingredients they select help boost thermogenesis which initiates fat shedding.

Thermogenesis is a metabolic state in which the body burns calories to produce heat. It is called adaptive thermogenesis when it is in response to the environment, i.e., under- or over-eating. Thermogenesis raises adrenaline levels, a hormone that drives fat cells to produce fatty acids for energy.

F-BRN Komplex’s seven ingredients may also reduce your appetite, helping you feel content after having a reasonable meal portion. F-BRN Komplex, according to its creators, reportedly increases fat breakdown effectively.

F-BRN Komplex manufacturers offer worldwide free delivery with a 30-day money-back guarantee and easy return policies if you are unsatisfied with your order.

What Is GetFit Fitness F-BRN Komplex?

The GetFit Fitness F-BRN Komplex is a fat burner that claims to use natural fat burners in its formula to help people lose weight. The seven ingredients in GetFit Fitness F-BRN Komplex are

  • Green tea extract
  • Caffeine
  • L-carnitine tartrate
  • Garcinia cambogia
  • Guarana extracts
  • Citrus auratrium extract
  • Pepper extract

These natural ingredients are appetite suppressants and curb food cravings. They also fast-track thermogenesis, which accelerates fat loss. The brand also claims that these powerful fat-burning ingredients will boost your energy levels, helping you get the most out of your workout goals.

The formula is devoid of any artificial ingredients.

Unfortunately, with recent research, the Food and Drug Administration (FDA) has sent warnings to people using some brands with Garcinia cambogia. There is a potential that this ingredient could cause liver health implications[1].

For this reason, before you buy and use stim-free fat burners–or fat burners in general–be sure you get a doctor’s input first. 

From the packaging and GetFIT F-BRN Komplex review, it may seem like an appropriate fat burner, promising effective fat burning; yet it may cause you far more problems in the future.

So please confirm with your physician if this thermogenic ingredient formula is what you need to lose weight safely.

Feature Product & Coupon

F-BRN Komplex

Best Choice

GetFit Fitness F-BRN Komplex

  • A fat-burning supplement
  • Claims to help boost metabolism
  • Reduce your appetite
  • All-natural ingredients
  • Free shipping
  • 30-day money-back guarantee

How Does F-BRN Komplex Work?

For F-BRN Komplex to trigger your system into fat-burning mode, it uses its seven active ingredients, which we shall highlight later.

In a nutshell, the L-carnitine tartrate enhances fat metabolism and loss. Caffeine proffers body energy; green tea, Citrus auratrium[2], and cayenne pepper promote thermogenesis, and guarana extracts slow down fat formation. Garcinia cambogia may limit fat formation and act as a potent appetite suppressant.

F-BRN claims to give you more energy, suppress appetite, and aid weight loss. Adding this supplement offers the ability to push through challenging workouts, assuming you are on a balanced diet and have sufficient liquid intake. It is most effective when you are on a low-calorie diet.


  • Contains natural ingredients
  • Help with weight loss
  • Accelerate your metabolism
  • Slow down or block fat cell formation
  • A cheap fat burner
  • Help you curb food cravings
  • 30-day money-back guarantee


  • There are rumors that the company deletes negative reviews on its website
  • Can only buy it from GetFit Shop UK
  • An ingredient is concerning liver toxicity

F-BRN Komplex Ingredients

F-BRN Komplex ingredients are purported to be the reasons behind the company’s claims. In this section, we shall describe each active ingredient and what it achieves.

Here is the ingredient list:

  • Caffeine
  • L-carnitine tartrate
  • Pepper extract
  • Garcinia cambogia extract
  • Guarana extract
  • Green tea extract
  • Citrus aurantium extract

This formula contains thermogenic fat burners and brain and mood boosters that raise your innate serotonin levels to improve your mood.

F-BRN Komplex ingredients


Caffeine[3] is the active ingredient in coffee that acts as a metabolic rate booster and a fat burner. This substance is a natural fat burner and a decent appetite suppressant, which works in favor of someone wanting to shed some fat[4]. Caffeine can also help increase energy levels and fight fatigue.

According to the FDA, you can have up to 400 mg of caffeine[5] daily. The dosage in this supplement is 45 mg per capsule, which is 135 mg per day. This amount is safe to offer you boosted energy levels, help with weight loss, and boost metabolism.

L-Carnitine Tartrate

L-carnitine tartrate boosts fatty acid oxidation[6] while decreasing fatigue during exercise. This may help minimize muscle weakness[7] for people with an active lifestyle. This form of l-carnitine is commonly added to sports supplements due to its rapid absorption rate.

This substance helps energy production[8], improves brain function[9], and enhances exercise performance[10]. The recommended dosage of l-carnitine for fat and weight loss is within the range of 500 mg to 2000 mg. 

However, some athletes may go up to 4000 mg. This supplement contains 143 mg per capsule, which translates to 441 mg daily, falling short of the 500 mg mark.

Pepper Extract

Piperine[11] is an antioxidant-rich substance with fat-burning benefits since it improves metabolic function and reduces the buildup of fat in the body. This spice is a thermogenic ingredient that aids in accelerating the metabolic process and improving calorie burning.

It also raises the content of good cholesterol[12], which is vital when you are actively losing weight.

The pepper extract content in this fat-burning supplement is 1.8 mg per capsule or 5.3 mg per day. The daily recommended dosage of this ingredient is approximately 5 mg per day.

Garcinia Cambogia Extract

Garcinia cambogia is believed to aid weight loss by limiting fat formation and curbing your appetite. Hydroxycitric acid[13], or HCA, the fruit’s key ingredient, competes with an enzyme your body employs to begin producing fat.

Garcinia cambogia also increases serotonin levels[14] in the brain, which may help curb your food cravings. It may also reduce levels of “bad” cholesterol. Please note that most available studies are animal studies, so more human studies are needed to confirm whether it can raise serotonin levels or lower cholesterol effectively.

There are, however, a few cases where this ingredient has been linked to a couple of liver health issues[15]. In high doses, Garcinia cambogia can reach toxic levels enough to cause some liver damage. 

One capsule contains 42 mg of Garcinia cambogia, and you get 126 mg daily. That is within 25 mg to 78 mg[16] per day per adult.

Guarana Extract

Guarana extracts are also antioxidant-rich ingredients in this fat burner that may reduce fatigue and boost focus. 

Regarding caffeine, guarana is ten times more potent than regular coffee beans. This quantity helps the body boost its metabolic rate, which translates into more fat breakdown when the body is at rest (i.e., thermogenesis).

It may also limit fat formation[17] and improve digestion. The quantity in this F-BRN Komplex is 100 mg, which translates to 300 mg daily. This is within the suggested dosage of 200 mg to 1600 mg per day.

Other Ingredients

The last two ingredients are green tea extract and Citrus aurantium extract.

Green tea contains antioxidants that help the body ward off oxidative stress. This makes it helpful for the heart[18], brain[19], and all other body systems. 

For weight loss[20], it inhibits cells’ ability to absorb fat, boosts metabolism[20], and enhances thermogenesis[21]. It may also improve exercise performance by delaying muscle fatigue[22].

A day’s dosage contains 500mg of green tea extracts with 166 mg per capsule.

Lastly, Citrus aurantium extract (bitter orange) is a thermogenic agent that enhances weight loss[23]. This substance has also been used to treat anxiety[24], digestive issues[25], and insomnia[26]. The F-BRN Komplex pill contains 37.2 mg of citrus Aurantium per capsule (leading to 111 mg per day).

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Health Benefits Of F-BRN Komplex

Most of the F-BRN Komplex reviews online list these health benefits as the main ones that the supplement offers:

Helps boost thermogenesis and accelerates metabolism.

  • Limiting fat formation
  • A boost in energy
  • Curbed appetite
  • Better digestion
  • Better mental acuity
  • Better overall health

Potential Side Effects

Before looking at the side effects, it is best to understand why you may suffer them. It happens when you

  • Take the supplement in excess
  • Are allergic to an ingredient
  • Are using a supplement for the wrong reasons

To avoid the first instance, you must always follow the manufacturer’s dosage advice, backed up by your doctor’s advice. You should also be aware of your allergic sensitivities and use a supplement for its intended purpose.

Regardless, here are the potential side effects you may suffer: 

  • Stomach discomfort
  • Headache
  • Dizziness
  • Dry mouth
  • Sweating

Note: Always seek medical advice before using this and other stimulant or stim-free products for weight loss, especially if you are under medication or have an active diagnosis.


A complete day’s dosage is three capsules. You need to take the capsules throughout the day with sufficient liquids.

It is best to use this fat burner alongside an active lifestyle where you consume a healthy diet and maintain a healthy workout routine.

GetFit F-BRN Komplex Review: What Do Real Users Say?

F-BRN Komplex reviews from clients also highlighted quite a bit about the brand.

The first site we checked out was the brand’s website, where we found only positive F-BRN Komplex reviews like this one from Tobias and Lydia, respectively.

Great product, I have tried so far a few fat burners, but this one is by far the best

Rhea. L

In the context of a calorie-reduced diet, the best supplement! great help for losing weight!

Misses K

Comments left on company websites are mostly positive, which may raise suspicion of bias. GetFit Fitness has been suspected of deleting bad reviews from its site.

Next, we looked at F-BRN Komplex reviews Trustpilot. Here is what one client had to say:

Not in the UK at all!! Canceled my order within 10 minutes, and I have had zero response from them apart from the acknowledgment email. Total scammers mislead you into thinking it’s a UK company when it is all in Germany. No contact numbers were given. I have told them not to ship the canceled order under any circumstances as delivery will be refused, and I will not be held liable for any loss of theirs. The unbelievably misleading company avoids like the plague, update although the order was canceled, they have still shipped the order and then told me I have to send it back!!!!! Delivery will be refused, total con artists.

Jason Bibby

From this comment, he highlights that the company is a scam. According to him, they are not in the UK, lack contact numbers, and have a broken return policy.

Still, on Trustpilot, more comments highlighted that the company’s customer support was a major concern. They never reply to emails, do not process returns on time, and there are even cases of unfulfilled orders.

Looking at any GetFit F-BRN Komplex review indicating all these downsides gives us reason to believe that the company may be a scam. And here are some reasons they might be:

  • The website states they are in the UK, whereas they are in Germany.
  • The lack of a customer support number to call.
  • Reports on the ineffective fat burner by clients.
  • Poor customer service.

Final Thought

If you are on a weight loss journey you don’t choose just any product that promise weight loss. Far more effort should go into selecting the best product for weight loss.

You must review the thermogenic ingredients list, peruse the company’s claims, and compare them to the available scientific research. You should never believe anything you read unless it has scientific proof. Otherwise, it remains only a claim and not a guarantee.

You also need to know about the potential side effects, alternatives to the brand, and finally, what past clients of the product had to say about the supplement. From this F-BRN Komplex review, you now have enough knowledge to make a decision.

In conclusion, we have reason to believe that some deceptive and rather suspicious information about the product might make the legitimacy of the company and brand questionable. 

So, if you are seeking a sure, healthy, and tested fat burner, seek alternative brands with better online rapport with clients and positive feedback.

Frequently Asked Questions

Can you lose weight on F-BRN Komplex?

Yes, you can if you use the supplement as per the manufacturer’s recommendation and still live a healthy lifestyle.

How fast do you lose weight on F-BRN Komplex?

The manufacturers claim that you will start feeling the energy kick soon after your first capsule. You may notice some weight loss after a few weeks of using the supplement.

Does F-BRN Komplex have side effects?

Some users may notice more sweating because of thermogenesis.

Should I take F-BRN Komplex every day?

For the best results, yes.

+ 26 sources

Health Canal avoids using tertiary references. We have strict sourcing guidelines and rely on peer-reviewed studies, academic researches from medical associations and institutions. To ensure the accuracy of articles in Health Canal, you can read more about the editorial process here

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Mitchelle Morgan

Medically reviewed by:

Michael DiLeo

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:

Michael DiLeo

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