Best Fat Burners 2021

The definitive guide to the Best Fat Burning Supplements available right now 

}

Last updated: 05 Sept 2021

Looking for the Best Fat Burners of 2021? You’re in the right place! We know that the market is flooded with fat burners and it can be really hard to make a choice. 

That’s why we’ve rounded up the top 5 available to save you the time and hassle. Make no mistake, these are the best 5 fat burners money can buy right now. 

Our review team have tried each of these products and have a strict criteria to rate each one. We look at value for money, safety, effectiveness, reputation and manufacturing quality.

This allows us to only ever present you with the best fat burners on the market. This list is updated regularly, to ensure you’re getting the latest and greatest and no out of date formulas. 

  • Burn fat, keep muscle 
  • Lose stubborn belly fat
  • Products for every body type & age
  • Top 5 reviewed (updated regularly) 

Our top picks for 2021

Editor’s Choice

Instant Knockout CUT

  • Developed for Pro athletes 
  • Increase metabolism 
  • Control appetite 
  • Targets stubborn fat 
Hunter Burn
  • More ingredients 
  • Larger dose 
  • High grade supplement 
  • Big impact formula 

Hourglass Fit

  • For men & women 
  • Develop toned muscles 
  • Gain definition 
  • Stimulant free formula

Transparent Labs Stim-Free Fat Burner

  • Stim-free formula
  • Encourages higher fat burn
  • Clean and natural ingredients
  • May boost mood

    Burn Lab Pro 

    • Safe, natural formula with no stimulants
    • Stimulates metabolism 
    • Promotes muscle gain
    • Vegan friendly

    Full reviews

    In depth with the top 5 Fat Burners of 2021

    [Disclaimer: We do not make any guarantee of specific results and that the results can vary]
    Editor’s Choice

    Instant Knockout CUT

    The number 1 Fat Burner 2021

    Editor’s Choice

    Overview

    When it comes to top fat burning supplements, Instant Knockout CUT stands out as unique. Why? Firstly, It’s been on the marketing since 2014 (much longer than most of its competition). Secondly it was originally formulated for pro fighters who wanted to lose weight and get cut for a big fight. 

    But why does that matter to you? Well, it means a really well researched, clinically backed formula for a start. Also, if it’s good enough for pros, that means it’s good enough for everyone else too. 

    The Instant Knockout Cut site promises the following benefits: 

    “Chiselled chest and shoulders” 

    “Defined arms” 

    “Sculpted six pack” 

    “Shredded, carved legs” 

    Sold as a capsule rather than a powder, Instant Knockout boasts happy customers all over the world and continues to grow in popularity.

    Like a lot of supplements, these capsules are aimed at bodybuilders and athletes. But search for reviews online, and you’ll see that men and women of all shapes, sizes and walks of life love Instant Knockout CUT.

    Key Ingredients

    Instant Knockout CUT contains a range of effective fat burning ingredients. Here are some of the highlights:

    Vitamin D3 – Shown in some studies to reduce weight levels.[1]

    Cayenne Pepper – Derived from chili peppers, this ingredient has been shown in studies to be a very potent thermogenic.[2]

    Glucomannan – This fiber expands in your stomach to stop your hunger cravings, and reduce your calorie intake.

    Black Pepper Extract – Also known as Piperine, this ingredient can start your metabolism and provide you with a thermogenic boost.[3]

    The rest of the Instant Knockout Cut formula contains a selection of key vitamins and minerals that contribute to your overall nutrition. It also contains some caffeine, but we like the inclusion as it helps give you an energy boost. The L-Theanine in the formula should help balance out any caffeine slumps.

     

    [1] https://pubmed.ncbi.nlm.nih.gov/22998754/

    [2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257466/

    [3] https://pubmed.ncbi.nlm.nih.gov/20699591/

    Want to try Instant Knockout?

    How to take

    Each bottle of Instant Knockout CUT contains 120 capsules. According to the manufacturer’s instructions, you’ll get best results by taking it four times a day – once in the morning, lunch, in the afternoon and before your evening meal.

    Cons

    Conclusion

    We were really impressed with Instant Knockout CUT. It contains one of the finest ingredient profiles of any supplement in the fat burner category. It’s also been recently reformulated, meaning the latest science and research goes into every bottle.

    It’s also now vegan friendly, meaning it’s now suitable for everyone. If you’re looking for a product at an excellent price point that delivers, we’d recommend you try Instant Knockout CUT. It could be the product you’ve been looking for, to get the look you really want.

    Hunter Burn

    Best for High Quantity/Servings

    Overview

    Hunter Burn is our second product on this list, but by no means is it inferior. In fact, this product boasts the largest serving sizes and ingredient amounts out of any fat burner we’ve seen. The Hunter brand prides itself on this, as the site states it’s a ‘premium’ selection of products. This fat burner can certainly talk the talk when it comes to being high quality.

    In a nutshell, this is a fat burner for those who want the very best ingredients, at large amounts, for potentially bigger results. It costs slightly more than other fat burners, but with everything much bigger, we think it’s worth the extra cash.

    Ingredients

    Hunter Burn contains the key ingredients you’ll find in other products, but at much higher doses. For example, it contains matcha green tea, a variant of the green tea extract you find in other products. The difference is this type of green tea is three times stronger[1] – and (in theory) it could help burn calories even faster. Hunter Burn also contains konjac root, which is said to reduce hunger. To finish off, a good dose of vitamin D3 is thought to help you lose weight, but gain muscle[2]. The larger servings make up for the high price, giving you a range of meticulously-researched ingredients in optimal amounts.

     

    [1] https://pubmed.ncbi.nlm.nih.gov/14518774/

    [2] https://academic.oup.com/ajcn/article/99/5/1015/4577359

    Want to try Hunter Burn?

    How to take it

    Each daily serving is six capsules, and there are 30 servings per container, giving you a month’s supply. The directions on the label state that you should take two capsules with a large glass of water three times a day before your main meals.

    These large servings ensure your system is constantly full of potent fat burning ingredients and is the key advantage Hunter Test has over its competition.

    Cons
    • Only available direct from the manufacturer

    Conclusion

    Hunter Burn is a no-nonsense fat burner which is perfect if you’re looking for the maximum amount of ingredients in one high quality package. Sometimes you need a fat burner that goes above and beyond. If that sounds like you, then the large amount of ingredients and huge serving sizes of Hunter Burn might be just what you’re looking for.

    It’s a supplement for those who are conscious of quality and want better results. It’s #2 on our list because Instant Knockout CUT is more of an all-rounder, but Hunter Burn could also easily occupy this top stop. A fantastic product that we’d highly recommend.

    Hourglass Fit

    Suitable for men & women

    Overview

    In 3rd place is Hourglass Fit, a fat burner that’s been designed for women who want to get the ‘Hourglass Look’, namely, a shaped, toned physique that’s packed with muscle and minimal on body fat. The good news is, this fat burner works for anyone. When it comes to fat burners, there’s not really any difference between a male and female body! It’ll work just the same either way.

    So what’s so good about Hourglass Fit? Mostly the excellent ability of the product to control your appetite and burn fat at the same time. This means lowered calorie intake as you’re eating less food, and reduced belly and hip fat thanks to the powerful, thermogenic ingredients (see below).

    Benefits

    • Targets stubborn belly/waist fat
    • Blocks appetite AND burns fat
    • Powerful, caffeine free formula
    • Tone up for a fit physique

    Ingredients

    Hourglass Fit contains a potent range of fat burning ingredients. For instance, you’ll find a generous dose of glucomannan, a root extract that swells when it hits your stomach and stops you from getting annoying hunger cravings between meals[1]. As well as this, your appetite is kept well under control with the addition of 5-HTP. This compound is known as a natural precursor to serotonin, a brain chemical which has been shown to offset hunger-inducing hormones, helping you control your food intake[2].

    Also inside is cayenne pepper, a known thermogenic that works to heat up your body, boost your metabolism and help you burn more calories in less time[3]. It also contains a range of vitamins including zinc, vitamin B6, and vitamin B12. In addition, black pepper extract ensures your body absorbs the other vital nutrients in the formula.

    [1] https://pubmed.ncbi.nlm.nih.gov/16320857/

    [2] https://pubmed.ncbi.nlm.nih.gov/16846858/

    [3] https://pubmed.ncbi.nlm.nih.gov/23844093/

    Want to try Hourglass Fit?

    How to take it

    Each bottle contains 120 capsules, giving you a 30-day supply. To get the best affects and keep the fat burning ingredients in your system at all times, you should take one capsule four times a day.

    Cons
    • Only available direct from the manufacturer

    Conclusion

    Hourglass Fit is a fantastic fat burner and again, we stress that it’s suitable for men and women! Take a look at the excellent range of ingredients in the product and you’ll see it’s been manufactured to a very high standard.

    It’s also stimulant free, so if you prefer your fat burners without the pick me ups, this could be the product for you. It’s range of ingredients will still provide you with plenty of additional energy thanks to the metabolization of fat that they promote.

    We’d highly recommend Hourglass Fit if you’re looking for a stim free, high quality fat burner.

    Transparent Labs Stim-Free Fat Burner

    Overview

    You should be familiar with the name Transparent Labs if you’re into your supplements. The company develops a range of products that are completely natural and packed full of potent, science-backed ingredients. PhysiqueSeries Fat Burner Stim-Free is one of its most popular weight loss options. With it, you’re provided with a clean formula that excludes stimulants to promote higher fat burn and block hunger. A blend of plant-based ingredients support your body’s natural fat burning ability to help you lose more weight.

    What’s in it?

    Inside PhysiqueSeries Fat Burner are 6 quality ingredients that work to boost fat loss. Thermogenic cayenne pepper[9] and amino acid L-carnitine[10] heightens fat loss by boosting lipolysis, the burning of fat for fuel. Forslean also helps to reduce body fat percentage by encouraging the release of fatty acids from stubborn fat tissue[11]. Instead of stimulants, it uses a blend of B vitamins to give you a gentle energy boost. 5-HTP[12] and rhodiola rosea[13] are also in the mix to regulate your mood and increase overall wellbeing.

    Want to try Transparent Labs Stim-Free?

    How to take it

    Simply take two capsules twice a day with a large glass of water, an hour before a meal.  Transparent Labs also tell you to start with one capsule, twice daily, to ‘assess tolerance and response’ for the first three days. As always, you should follow the guidelines given to ensure you have a safe and effective experience.

     

    Cons
    • Only available direct from manufacturer
    • High price tag

    Conclusion

    PhysiqueSeries Fat Burner Stim-Free is a good stim-free option and contains a well-studied formula. The natural fat burning ingredients combine to boost the rate of thermogenesis and lipolysis, whilst dealing with the way your body handles stored fat. By amplifying the rate at which you use fat for fuel, you may experience some good fat loss with this product. It’s a great option for anyone sensitive to stimulants and those who struggle with low mood and motivation when on a calorie restricted diet plan.

    Burn Lab Pro

    Overview

     Another stim-free option, Burn Lab Pro aims to raise your metabolism and overall calorie burn while maintaining muscle mass. When used alongside fasted training in particular, Burn Lab Pro works to help you train at a higher intensity and rid your body of stubborn fat. This could be the ideal solution if you’re looking to burn more fat but gain more muscle.

    The creators claim Burn Lab Pro has the cleanest fat loss label on the market, with a completely natural and transparent formulation. How do the ingredients maximize your results? Let’s find out.

    What’s in it?

    The Burn Lab Pro formula combines ‘today’s 5 top ingredients for fat loss, training intensity, muscle gain and more’. Inside you’ll find an entirely natural and clean list of ingredients which promote safe weight loss. Popular thermogenics cayenne pepper and Bioperine work to speed up your metabolism[14]. Ayurvedic root herb Coleus forskohlii is linked to weight loss by activating an enzyme that increases cAMP, a signaling compound that promotes lean body composition[15]. Beta-hydroxy beta-methylbutyrate (HMB) is also a good inclusion, as it works to neutralize enzymes that cause muscle damage when training, improving strength gains through protein synthesis[16].

    Want to try Burn Lab Pro?

    How to take it

    You get 90 capsules in each bottle of Burn Lab Pro which is around a 22-day supply if you take the maximum recommended dose of four capsules per day. Burn Lab Pro recommends that you take two to four capsules, around 30 minutes before you hit the gym. As always, follow the product label’s directions carefully and never take more than it says.

    Cons
    • Slightly expensive
    • Added vitamins would help

    Conclusion

     Burn Lab Pro is a simple yet effective formula designed to be taken alongside a healthy diet and training regime. There are some high-quality, well-researched ingredients in the mix and we have no doubt that it’s safe to use for a long period. If you’re a little sensitive to stimulants, you’d be glad to know Burn Lab Pro is 100% caffeine-free. If you’re looking for an extra boost alongside your training Burn Lab Pro is a good option.

    Our Top Picks

    Still can’t decide? Go back to the top and take a look at our top picks.