F-BRN Komplex Review – Does This Fat Burner Work? (Updated)

A photo of see-through herbal capsules with brown colored contents lying on a yellow background

F-BRN Komplex Review: In this review, we’ll see if F-BRN Komplex can give you more energy, boost the metabolic rate, curb food cravings, and generally make weight loss an easier process, among others!

At the moment, you can only officially get F-BRN Komplex on the GetFit Fitness website. The good news is, it ships to the UK, Germany, the Netherlands, and the rest of the world!

In terms of benefits, F-BRN Komplex is said to help you:

  • Boost fat breakdown
  • Increase the metabolic rate
  • Suppress appetite & hunger

You may ask, what makes F-BRN Komplex different from the masses of fat burner pills out there? It can be really hard to find a product that works nowadays, not least because they’re so many options available – many of which are complete garbage.

We set out to inspect F-BRN Komplex’s formula and test it for ourselves to see if the manufacturer’s claims hold up. Starting with a simple review summary!

F-BRN Komplex Simplified

So, what’s our opinion on F-BRN Komplex?

We’ve found it to be a decent product, but not quite as good as the marketing hype made it out to be.

To begin on a positive note, F-BRN Komplex is completely transparent so you know what, and how much, you’re putting in your body.

Fat burners that actually work all have a few things in common, and one of them are ingredients that are proven to burn fat or suppress appetite – including chromium, cayenne pepper, and Glucomannan. F-BRN Komplex doesn’t have any of these.

It is a really cheap fat burner, though, and you get 3 servings per day (1 capsules before each meal), so it’s not the worst product we’ve reviewed. But if you’re serious about weight loss, then we’d consider a more serious fat burner in this case!


  • Green tea has catechins that will support your metabolism (study)
  • Stim-free, great if you don’t like the caffeine kick
  • The price is often discounted from £59 to £39 per bottle, along with other promotions


  • Garcinia Cambogia may cause side effecs in rare cases (source)
  • Missing core ingredients like glucomannan
  • Mixed reviews

Looking for fat burners that work?


How Does F-BRN Komplex Work?

F-BRN Komplex claims to offer multi-pronged approach to weight loss:

  1. Increases thermogenesis
  2. Suppresses appetite
  3. Reduces carbohydrate cravings
  4. Boosts fat utilization without using stimulants

If you’re curious, the term ‘thermogenesis’ involves a process where your core body temperature rises. This puts your metabolic rate into high gear as the body tries to keep itself cool. Ultimately, leading to a slight calorie loss over the course of the day.

Sounds good – but how accurate are the claims of F-BRN Komplex? Let’s check the ingredients to find out.

F-BRN Komplex: The Ingredients

There are only 4 ingredients in the F-BRN Komplex formula. The good thing is that they’re all transparently shown on the label, so you can see their doses and how much you’re taking.

Here’s a closer look:

1. Green Tea Extract (300mg)

Thermogenic ingredient. Has very little caffeine and is virtually stim-free.

Green Tea extract helps to boost hormones like noradrenaline and adrenaline. These are stress hormones that put your body into a mode where it’s burning more calories and not conserving energy. This is obviously a good thing for weight loss. It’s nothing spectacular on its own, but combined with the right ingredients, green tea extract can pack a punch.

2. Garcinia Cambogia (126mg)

Helps control appetite.

Garcinia Cambogia contains something known as “HCA,” a type of acid that’s shown promise in accelerating fat burning within the body. In addition, Garcinia has been suggested to act on your brain’s serotonin receptors. This can make you feel less hungry as serotonin regulates appetite. Still, Garcinia is deemed as possibly unsafe by FDA, as stated on WebMD.

3. Caffeine (135mg + 30mg from Guarana)

Helps boost your energy and focus.

Caffeine is a central nervous system stimulant and is one of the most common ingredients in fat-burning supplements. It boosts metabolism, leading to increased calorie burn. Moreover, caffeine enhances athletic performance by increasing endurance, which may further contribute to calorie burn during workouts.

Comments on Dosage: 165mg of caffeine is a moderate dose – roughly equivalent to 1.5 cups of coffee. For those who are caffeine-sensitive, this might lead to jitters, insomnia, or a rapid heartbeat. Its fat-burning properties are more pronounced initially, but as the body builds a tolerance, these effects diminish. If someone is already consuming other sources of caffeine, this can quickly add up, making it ineffective for daily, long-term use.

4. L-Carnitine Tartrate (441mg)

This isn’t proven to aid weight loss.

Carnitine is a very popular and hyped up ingredient. There’s a common misconception that it can induce weight loss – it doesn’t seem to have a meaningful effect, unless you’re deficient in it. It’s not easy to be deficient in carnitine. Your body creates some of its own, and you also get some from food. Much better ingredients could be put in its place.

5. Citrus Aurantium Extract (111mg)

Potent stimulant.

Citrus Aurantium, also known as bitter orange, contains a compound called synephrine. Synephrine is a stimulant that can increase metabolism and fat oxidation. It’s touted as an alternative to ephedra, which was banned due to serious side effects.

Comments on Dosage: 111mg is on the higher end for a daily serving, especially given the aggressive nature of the stimulant. Given its similarities to ephedra, it may come with a risk of side effects like high blood pressure. When combined with caffeine, the potential side effects could be amplified, making it a potentially risky combination for some people.

6. Pepper Extract (5.3mg)

Pepper extract, often derived from black pepper and containing the active compound piperine, may enhance the bioavailability of other ingredients in a supplement. This means it helps the body absorb and utilize them more effectively.

Comments on Dosage: While 5.3mg is a standard dose for enhancing absorption, in this context — given the high stimulant content of the other ingredients — it might not be ideal. Making already potent stimulants even more effective can amplify potential side effects, making the overall supplement potentially more intense for the user.

Our Thoughts on the Ingredient Profile

It’s not quite what we expected from it. While it should give you an energy punch, one should wonder if it’s a healthy long-term formula.

In terms of weight loss, green tea and Garcinia should help both reduce your cravings and increase calorie burn at the same time. But a better appetite suppressant (and safer) than Garcinia is glucomannan or l-tryptophan (or 5-HTP for short-term use).

Other core ingredients that are missing from F-BRN Komplex include chromium, cayenne pepper extract, and B-complex vitamins.

Editor’s Pick:

The 5 of the Best Fat Burners – 2024 Edition

How to Take F-BRN Komplex

Using F-BRN Komplex is simple – 3 capsules daily with a full glass of water or another beverage of your choice.

There’s 90 capsules in total per bottle, meaning it will be enough to last you a month with this kind of serving size.

Still, it’s not ideal as the effects will be wearing off with only one daily dose. To maintain the fat burning benefits, 3 or 4 daily doses are a better option.

Does F-BRN Komplex Have Side Effects?

Garcinia Cambogia may have. It’s an ingredient which works great for some, but for others, especially those with liver issues, it can cause side effects.

Therefore, some of the potential side effects of using F-BRN Komplex include:

  • Nausea
  • Headache
  • Dizziness

Garcinia also interacts negatively with some medications, so before even considering trying it, make sure to talk to your doc about it!

Not to mention the combination of caffeine and bitter orange – the two can be dangerous for people with heart and blood pressure issues.

Customer F-BRN Komplex Reviews

What do other customers say about F-BRN Komplex? Well, not much! Apart from a few other reviews on the internet, you’ll find testimonials mainly on the official GetFit Fitness website.

The problem is, the comments there are all extremely positive with 4 and 5 star ratings. Negative comments are non-existent.


For those who’re curious, F-BRN Komplex isn’t officially available to buy on Amazon or Holland & Barret at this moment in time. As for the price, it costs 29 British Pounds but they sometimes run a deal where you can get 2 bottles for “only” 50GBP.

F-BRN Komplex also ships to the USA. For American customers, the price of F-BRN Komplex is $39.00.

F-BRN Komplex Review Summary

We think this has room for improvement. F-BRN Komplex isn’t a bad product – for some people, its stim-free formula will work better than some caffeinated products, in terms of not causing jitters or energy crashes.

But when it comes to safe fat burning results, this is where F-BRN Komplex could do better. Not only is it missing core ingredients, it also uses potentially risky Garcinia and stimulants. This is why we can’t recommend it.

What’s better?

-Click for Top 5 Fat Burners of This Year-

Check Our Other Fat Burner Reviews


  1. I have purchased this product a few weeks ago. I took advantage of the offer, buying 2 for £50.
    I started to take the pills 1 before every meal. I have combined them with a bellow 1300kcal per day diet and I do active cardio every day for at least an hour, strength 2 times a week. I needed the pills to help me lose some weight as I am 62kg for 155cm height. I took the pills for 3 weeks and saw no result. My appetite was not decreased and my weight only went down on the days I would have less than 1200kcal (which happens even if I don’t take the pills).
    I have requested to return and get a refund. I have ordered the product from GetFit Shop UK, but the return address was not a UK address. It was a German one. To send them back would have cost me pretty much the same amount as the refund as the products need to be sent as a small parcel. This is really disappointing and not only that I don’t recommend the product, but I wouldn’t recommend the Get Fit Shop UK platform.

  2. Hello

    I have purchased f-Brn komplex but cane with no instructions of how to take them? Is it 3 tablets all together in the morning or 1 tablet before each meal ???

  3. i have used them too, eat 1500 calories a day, i cycle 14 miles a day an run 3 times a week 7 miles, 3 times a week power training. But no result, not even 1 ounche. Sad

    • First comment in 5 years but I could not help myself : What a load of bull 🤣, I’d be dead, and that’s not a maybe, that’s a scientific fact.

  4. I trialled these pills, I’m two weeks in and I’ve seen no difference on the scales (a survey they did on their site said people lost up to 12 pounds within the first week….)
    My appetite was decreased slightly and easier to stick to 1200 but it hasn’t worked. They gave me a really weird side effect too, my left arm kept going really numb and my heart didn’t feel right. I would not recommend these.

  5. I bought those pills a bit more than a week ago. Hard to say yet about result but my scales showing the same weight as before. Only my appetite is slightly decreased. Not impressed. Instructions only in German language 😒

  6. I used this pill for one month, 3 pills a day, not having any suger
    I was 64.700 kg when I started the pill and I’m in 61.500 kg this morning

  7. I have purchased this product on the 4 of December, still haven’t received. Contacted the company by email more than once and they don’t answer. What a lousy service!!!it comes back an automatical email in German and that is it! 😡

  8. I only realised when I read this page that these pills are dangerous if you have liver disease- which I do. What could have happened if I had just taken them. Awful.

    • thank you Emily I to purchased F- BRN KOMPLEX get fit should get right first no instructions after all, after a few attempts I hit on this site! lucky me, as you have liver problems I feel for you I had my gallbladder removed, so the effects can be gain or lose weight, mine went both ways,hence f-brn I’ve only been taking them for 4 days and since the liver is now doing the work of the gallbladder I’m worried about the ingredients well one in particular
      it has not suppressed my appetite, but I only eat steamed fish or chicken with veggies or salad, so I’ll be taking your advice and I think I’ll give them a miss, and check out editors choice, perhaps paying more works out cheaper in the end,

  9. Absolutely disgraceful no cancellation policy and no English when says it’s an English company only answer in a different language

  10. I’ve been using these for about three weeks now with an under 1000 kcal daily intake which includes no sugar and very low carbs. Personally I found my appetite a lot less when I started taking these. I’ve been consistently losing weight too but that may just be because I’ve dropped my calorie intake. Not gonna speak too soon until I’ve finished my first bottle of these, but I feel like they’re doing me good in terms of suppressing my appetite.

    • Hi Kaya,

      Good job on seeing results! Still, we wouldn’t advise going on such a low-calorie diet without consulting a qualified professional first. It’s definitely not sustainable and not hormone-friendly long-term. You can eat a comfortable diet and still lose a good amount of weight if you know the right steps.

      If you need help, our nutritionists currently have a few spots open for designing a customized meal and workout plans – feel free to reach out through the contact form if interested.

  11. Absolute waste of time was the fbrn komplex. DO NOT recommend. Genuinely upset as I have been trying to lose weight and this has just wasted a month of my life in which I could have been actually losing weight and becoming body positive. Thanks a fucking lot.

  12. I sent you a request for a refund two days ago.There has been no comment from you and as there is no Uk address to contact this tends to heighten my really high confirmation that your company is not reliable.
    I should like a complete refund on what is obviously very close to fraud.
    If no answer my next stop is with the TRADE DESCRIPTIONS

    • Hello Joseph,

      You’re in the wrong place. Quin Candy doesn’t sell F-BRN Komplex, nor do we sell any other supplement/product for that matter. We’re also no affiliated with F-BRN Komplex in any way.

      Again, we have to emphasize this: we do not sell supplements. We merely review them. We are supplement critics, not manufacturers.

      Please head over to the official website of F-BRN Kommplex and ask them for a refund.



  13. This product is a complete scam, it has no side effects in fact no effects at all! No energy boost and absolutely no weight loss. I have taken the full course-don’t waste your money!

  14. I ordered these tablets in November ! At the end of December i still hadn’t received them and sent them an e mail to complain. I also made sure I paid by pay pal to secure my decision if the company wasn’t legit.
    Luckily for me pay pal refunded me within 1 day so I’m very pleased indeed that I haven’t wasted my money.
    Hopefully others get the money back soon.

  15. After seeing someone I know lose a load of weight in a short amount of time. She told me that she had been using these pills. Amazing, I thought! I’ve only taken two so far. (My first day) and I have been feeling sick all day so far… I’m not sure I will carry on after today… I have an under active thyroid and I’m anemeic, so not sure this will affect the process…

  16. I placed an order read the bad reviews immediately asked for a refund only to be told they have to be posted out to me and I have to send them back to Germany before they will refund me I have a heart condition that simply isn’t safe taking these as someone further up said made there heart feel funny

  17. Oh I have just received mine, and now I’m scared to take them after reading all the negative reviews, do you recommend I bin them and just accept I have lost £50 because it sounds like a refund will be an impossible task ?

  18. Rubbish. These pills don’t work!!! Any good reviews must be FAKE!
    The only thing I’ve lost is the £50 cost and it is appalling that you cannot get a refund. These have given me spots on my face, which I never had before and as soon as I stopped taking them, my skin cleared up. After eating really carefully for 6 weeks, I weighed myself and had put on 2 lbs.
    What is in these tablets? Whatever it is it’s bad for you.

  19. I bought this and started taking it on Wednesday, so far I have lost 1 lb a day and I have been dieting for the past 5 months so it is not initial weight loss, just wanted to shift last half stone.
    I am very pleased with the result.

  20. This is rubbish.Don’t waste your money.
    No weight lost at all.
    No good results but no side effects either.
    Don’t waste your money, complete waste of time.

  21. I have been using these for a week now and have list 8 lbs very happy with product don’t know what’s wrong with the comments maybe your eating the wrong food

  22. Having read the reviews I now realise that I am unable to take it. I promptly cancelled the order but they refused to stop it and also will not refund until I return. Unscrupulous company do not use.

  23. Like Sharon , I did not read the reviews until I received the pills and I’ve been told so many times ‘read the reviews’ The pills contain Garcinia Cambogia which is regarded unsafe for one’s liver. We’ve all been scammed.
    A genuine honest company would make it easy to return goods.

  24. I ordered but decided against taking after looking into liver affect. But to be fair I emaileD them to return. I paid by PayPal and they put the £29 back straight away.

  25. I placed the order 10 mins ago.. read theses reviews a d have sent 2 emails asking them not to ship out or take the payment . Wish me look.

  26. Hi
    I did receive my parcel yesterday.
    I had 3 pills a day from 1 pill after like 30 minutes I feel headache and daisy

    But what I notice my appetite was less

    I did read all the reviews and I afraid to go ahead !?

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