Fat Burning Reviews, Tips and News

Best Fat Burner – 2020 Awards

UPDATED FOR 2020. There are more fat burners on the market than ever. But which is the BEST fat burner? We’ve tried so many and found one clear winner. Choosing a fat burner for the year can be a big choice, especially if you are committing to a longer weight cut. This is why you need to be sure you are buying the absolute best fat burner supplement possible.

When you choose that all important best fat burner for 2020 you need something you know is going to get your abs showing and your confidence levels.

3 Main effects any fat burner you buy should have:

Save your time. Save your money. See the 3 best rated fat burners.

See the Best Fat Burners of 2020.

  • Increase your metabolic rate. Ensuring fat and calories are burnt through the day
  • Suppress your appetite. Consume less calories and store less fat. 
  • Boost your energy levels. 

Each fat burner in this list (all 17) hit at least one of these markers. Our top 3 tick them all off. With our number #1 being the most effective without ANY major side effects.

2017 Transformations

Looking through fat burner review after fat burner review?

Well rest assured we have tried and tested our list of top rated fat burners. They’re not just some random supplements picked from nowhere. These are essential products that work.

We’ve tried to go with big reputable supplement companies for each product and chosen ones that are driven by results, not just profits.

Generally, when buying a fat burner you want the best possible product that comes from an established retailer.

Try and avoiding buying products that look cheap from places like Amazon and Ebay.

2020 UK and USA Best Fat Burners the list…

BEST FAT BURNER 2020: #1 Instant Knockout

Best fat burner this year OVERALL – The reigning champion again


What our review said:

The most effective fat burner going into 2020. Increase your metabolism, eat less and burn fat with natural and safe ingredients. Getting your beach body ready just got loads easier!

Instant Knockout contains clinical doses of these ingredients:

  • Green Tea:  Found to boost metabolism as well as break down fatty acids in the liver.
  • Glucomannan: A dietary fibre that will expand in the stomach and reduce calorie intake.
  • Caffeine: Highly effective at boosting your metabolism and suppressing appetite. As well as providing energy.
  • GTF Chromium: Optimizes insulin levels. This is essential to ensure a healthy metabolism.
  • Green Coffee: Helps prevent glucose being absorbed into the blood. This forces your body to burn fat as energy.
3 Months Cutting. 3 Days a week training. Fairly clean diet.


  • Increased metabolism, full body fat burn and appetite suppression
  • Visible effects in as little as 12 days*
  • More energy and increased confidence
  • Natural ingredients with minimal side effects
  • 4 capsules per day, optimized for nutrient partitioning
  • Shipped direct from the United Kingdom and the United States
  • Extensive customer testimonials


  • Premium pricing
  • Stimulants can keep you awake if taken too close to bed
  • Cayenne can cause sweating
  • Can only order from their website due to stock control

BONUS – 90 Day Guarantee

Order in confidence. If you buy the 90 day supply, and it doesn’t work, get your money back. No other products do this. 

Instant Knockout Guarantee
Instant Knockout Website

-Visit Instant Knockout-

-Our Full Review-


#2 Grenade Thermo Detonator

Best Fat Burner 2020 that contains Bitter Orange


What our review said:

A fairly good blend let down by Bitter Orange Peel. If we could go on looks alone Grenade would be #1. Ultimately though, it’s just not as well thought out as Instant Knockout and won’t get you as good results.


  • High profile brand
  • Good blend overall
  • Works well with heavy gym sessions
  • Widely available


  • Harmful side effects from Synephrine
  • No guarantee
  • Small daily dose

Full Review

#3 MusclePharm Shred Sport


What our review said:

A fairly solid product that once took our #1 spot, but has too many ingredients in it and uses a proprietary blend. There are better products out there for your money which is why Shred Sport Sits where it does!


  • Contains proven ingredients like Green Tea
  • High energy, increased metabolism
  • Affordable pricing
  • Trusted company


  • Proprietary blend
  • Low amino acid dosing
  • High Potential for unwanted side effects

Full Review

Manufacturer Website, buy 3rd place in the top fat burners: www.musclepharm.com

Scroll down for alternative 2020 fat burners…

What Fat Burner’s Best Fat Burner Explained

We judge our fat burners on the following key criteria in order for them to make the cut:

Results – Will this fat burner work, and will it work for everyone who buys it?

A fat burner that gets results is hard to find. One that fits as many types of people. With loads of different genetics is even harder. So these products, are safe and will most likely work with YOU!

Side Effects – Side effects can cause more harm than good.

It’s essential when you start supplementing any fat burner (hopefully from our top 3) you do so with a product that is completely safe. Side effects can set you back and even ruin your results altogether!

Cost – You get what you pay for!

Our #1 may seem slightly expensive, but you get what you pay for with supplements. Don’t waste time taking something that won’t work and could cause you harm by going cheap!

Availability – How fast is delivery?

Getting a product from a company with poor customer service and a rubbish delivery network can be nightmare. We’ve ensured this isn’t the case with our top 3.

Trustworthiness – Don’t get cheated.

Lots of companies will try and scam you with auto re orders, proprietary blends and dodgy ingredients. We’ve checked companies fully online to ensure this list is scam free! Buy with confidence.

Reputation – Big Rep, Better Results

We’ve checked blogs, forums, other review sites and social media to ensure that each of these product backs up their claims. The customer doesn’t lie, and it’s good to know that.

Not Ready for a Fat Burner?

Not ready for a supplement from list of best fat burners? Well no worry, there are plenty of ways you can start the fat burning process at home.

Here’s an expert bodyweight fitness video from The Zeus Fitness that can really kick things into action!

Females can really ramp up fat burning by following some simple yet effective exercises too.

If you want to read more about the top 3 fat burning exercises to burn fat for women – click here.

Fat Burning Ingredients Index – What’s Inside Your Supplements?

We like to think we are the forefront of the best fat burners at WhatFatBurner.

Constantly being at the forefront means we have an ever growing archive on ingredients we regularly add to. Here you can see exactly what fat burning ingredients are and will do if you supplement them.

This index, our holy grail, has made it so we can safely assume the effectiveness of products based upon their ingredients and dosages.

An example of what you might see in a review:

Fat Burning Ingredients Index

Green Tea

Green Tea is very popular amongst health and fitness enthusiasts in recent times. Especially as it has been found that when combined with caffeine, it can boost your metabolism far beyond what caffeine can do alone.
Studies have shown that it can increase your metabolism to the point of burning an extra 200 calories a day without added exercise. 500mg of Green tea is perfect in a fat burner.

Rest assured we have pulled all the latest research and science on Green Tea together in the index and made it so it’s easy to understand in the context of the product you are looking at.

For a full green tea article you can check out this post!

What goes inside your fat burner is the most crucial part of the product.

Whilst it’s great to have a product that looks amazing and works – Instant Knockout and Grenade we are looking at you, the ingredients are the things that will get you shredded.

As we say in all reviews, avoid proprietary blends. These blends can cause more harm than good and are commonly the hallmark of a scam supplement.

Ingredients in 2020’s Best Fat Burner UK and USA

Common ingredients in top 3 fat burners

If you want to see more information on the ingredients we have featured in our top 3 fat burners, you should check the individual reviews.

We have ensure that each product is broken down in this top 3 page, with the effective and proven ingredients highlighted, but for more information check the reviews.

As we have mentioned we check all our ingredients against current scientific research and studies using publications like PubMed and Examine.

Rest assured these are websites that are at the top of their game, so you can be sure what they say is pretty much the gospel truth.

Using these sites as a resource we have managed to pull together our current list of top 3 fat burners.

Other Top Fat Burners:

#4 Transparent Labs Physique Series


What our review said:

A solid fat burner. Well worth your money but could prove a little too expensive for some. Potential for it to take #1 in 2019 with some tweaks.


  • Clever use of amino acids
  • Quick delivery
  • Proven blend of ingredients


  • Synephrine could cause side effects
  • Fairly expensive
  • Only available direct

Full Review

#5 Thermaxin Thermo Enhancer


What our review said:

A very affordable fat burner that uses some good doses of natural ingredients. It is a little under dosed so can’t compete with the top 3, but for affordability and potential to work over a long period it’s not bad.


  • Very cheap and still works
  • Contains Green Tea and Caffeine
  • Will boost metabolism and burn away some fat


  • Needs to be supplemented for longer periods
  • Under dosed in some ingredients
  • Contains synephrine

Full Review

#6 1UP Nutrition Pro Ripped


What our review said:

A solid product from a very good company. But it’s just let down by the frustrating use of a proprietary blend. You literally cannot see the amount of ingredients you are taking.


  • Trusted company
  • Some good ingredients
  • Widely available


  • Proprietary blend
  • High risk of side effects
  • Expensive for unknown doses

Full Review

#7 Warrior Blaze Fat Burner


What our review said:

It’s supposed to be one of the strongest, but ultimately is just a bit risky. This is for the hardcore fitness enthusiast and even then it may not work or be too strong. Plus it’s quite expensive.


  • Supposed to be very powerful
  • Great looking product
  • Available everywhere


  • Proprietary blend
  • High risk of side effects
  • Cheap looking

Full Review

#8 Leanbean Fat Burner


What our review said:

A female only fat burner that has a fairly solid blend and is similar to our #1 fat burner Instant Knockout. Not a bad effort and should get you some reasonable results, especially when supplemented for 3 months or more.


  • 90 day supply discount
  • Good use of scientifically backed ingredients
  • Premium blend


  • Aimed at women
  • Price may be too high for some
  • Can only be bought direct from them
  • Dose could be improved in places

Full Review

#9 Optimum Nutrition Opti Lean Fat Burner


What our review said:

A great metabolism booster, but not a very good general fat burner. High levels of stimulants may cause unwanted side effects too. Opti Lean is a fairly safe bet, but don’t expect results to be as good as our number #1 fat burner.


  • Guaranteed metabolism boost
  • Some fat burning properties
  • Big trusted company


  • Slightly over priced
  • Limited ingredients profile
  • High chance of side effects

Full Review

#10 Muscletech Hydroxycut Platinum


What our review said:

A solid supplement that is packed full of essential vitamins and minerals. It’s fat burning effects won’t be huge, but supplementation will be safe and you should get good results over time. Muscletech’s Hydroxycut Fat burner range is hit and miss, but this is one of the better options. You can buy all of these fat burners direct from MuscleTech’s website, but can sometimes find them cheaper online.


  • High doses of key vitamins and minerals
  • Probiotics
  • Widely available


  • Not a through and through fat burner
  • Over complicated
  • Can be expensive

Full Review

#11 Cellucor P6 Ripped


What our review said:

Cellucor have made a male orientated fat burner with P6 Ripped. We liked it because it does have some elements that can help with increasing testosterone (and reducing belly fat) but also uses sizable doses of key fat burning ingredients too. There is still room for improvement however.


  • 2 Supplements in one
  • Looks incredible
  • Caffeine and Cayenne are proven ingredients


  • Very expensive for the amount of ingredients
  • Not a focused, pure fat burner
  • Some ingredients may not work
  • Proprietary blend

Full Review

#12 Unaltered Athletics Fat Burner


 What our review said:

A solid looking fat burner that has a huge 5 capsule dose. There is a high risk of side effects though, so be wary. They could have also included more thermogenic elements than they did.


  • Good solid ingredients
  • High dose
  • Trusted company


  • Contains synephrine
  • Could cause side effects
  • 5 capsules per day could be annoying

Full Review

#13 MuscleTech Hydroxycut Ultra Stim


What our review said: 

A heavily caffinated fat burner that also contains some fairly good and effective minerals. It’s not as well tested as others in this list though. But is fairly affordable in price.


  • Cheap (ish)
  • Caffeine
  • Trusted Company


  • High chance of side effects
  • Lower dose
  • Limited proof it works

Full Review

#14 Killer Bees Fat Burner Review


What our review said:

It uses a proprietary blend which means that Killer Bees doesn’t quite take the number #1 spot for best fat burner in 2020. But this product does use some effective and proven fat burning ingredients.


  • Good ingredients
  • Good blend overall
  • Amazing name
  • Affordable


  • Proprietary Blends
  • No guarantee
  • Small daily dose

Full Review

#15 Vintage Burn Fat Burner Review

Vintage-Burn-Fat-Burner Review 2018

What our review said:

A fairly focused set of ingredients mean this is an ok fat burner. But it doesn’t come close to topping the list. Vintage Burn also contains Raspberry Ketones, which is an ineffective fat burning ingredient. There are some ingredients in here that will work though!


  • Good ingredients
  • Good dosing
  • Recognized brand
  • Good price


  • Some unproven ingredients
  • No guarantee
  • Raspberry Ketones don’t work

Full Review

#16 Phedracut XT Hyper Burn


What our review said:

A good blend of ingredients at a reasonable dose. There are worse fat burners on this list. But sadly this USN product is a little lacking in terms of it’s serving size and also missing some key ingredients to turn your body into a fat burning machine.


  • Proven Ingredients
  • Good dose
  • No side effects


  • Small serving size
  • Expensive
  • Hard to find

Full Review

Previous Top 3 Fat Burners

2014, 2015 and 2016 were all years when the supplements industry have been booming and fat burners are no different.

We’ve been reviewing fat burners on our website for a long time. What Fat Burner was originally started Summer 2013.

The quest for the best fat burner has been going ever since and our top 3 fat burners pages have come on a long way since the old ones.

For anyone interested though:

Top 3 Fat Burners 2014

Top 3 Fat Burners 2015

Top 3 Fat Burners 2016

Starting a Diet in the new year? – How to Stick to it

Having one of the top and proven fat burners ready in 2020 is all well and good.

But for a large proportion of these supplements to work effectively you need to be ready to nail down a diet too.

With January fast coming up preparation is key.

You’re reading this because your goal is weight loss. Now to ensure you lose a good amount of weight you need to be putting yourself in a calorie deficit.

Calorie Deficit = Burning off more than you take in

This is the simple rule of losing weight, and one you need to follow to ensure you are successful with any fat loss program.

Choosing a Diet

Like we said, there are hundreds of diet plans and workout guides out there, some are better than others.

We’d be ALWAYS inclined to choose a diet plan and workout guide that work WITH each other to promote fat loss.

You can see our favorite video based, comprehensive workout plan here.

Or alternatively you can get loads of free good ones over at bodybuilding.com.


Steve Cooks 8 Week training plan includes a nutritional guide, program overview, training overview. This is a good and essential guide if you are looking to build up some muscle and symmetry whilst also cutting back that fat.

-Steve Cooks Workout Plan-

Sticking to your New Year Diet

It’s easy to find a diet, but the hard thing is sticking to one. With so many people giving up on their new year weight loss plans, it’s frustrating to watch and probably even more frustrating to live it.

The simple way to stick to it is constantly remind yourself of what you are looking to achieve. Put notes all around the house and generally don’t give it. Telling your friends what you are going can offer a bit of positive reinforcement too.

So we are officially in bulking season. With most people starting to think about Christmas and the amount they are going to drink and eat over this period.

Best 2021 New Years Resolution Gyms

#1 Is Life Time Fitness. These gyms aren’t everywhere. But really specialize in helping you burn away fat. Offering a massive range of equipment and decent selection of classes, you can guarantee results as long as you pull your weight.

The one slight drawback is they’re not located everywhere. So if you are desperate to start the fat burn asap, you might be better off looking at one of the gyms lower down.


Fat Shredding HIIT Workout – Kick Off Fat Loss From Home

As not everyone will be able to reach a gym, we thought we’d share a fat torching home HIIT workout that can be performed anywhere.

HIIT is great because it maximizes fat burn in a short period of time. This means your body is working extra hard to burn those calories as energy and consume oxygen.

What’s even better is that when studied, people who completed a HIIT workout were actually found to have continued burning calories for as long as 24 hours after the workout.

While What Fat Burner’s  HIIT workout won’t be as taxing (some of you might be hungover) it will certainly ramp up that calorie burn and get you starting the new year. What’s even better is this workout works great with our best fat burner.


Best fat burning workout to start you shredding weight

Each exercise needs to be performed high intensity for 30 seconds. You get 10-15 second rest between each exercise. Repeat 2-3 times if it doesn’t knock you out the first time.

  • Jumping Jacks
  • Wall Sit
  • Push Ups
  • Crunches
  • Stair Step Ups
  • Squats
  • Tricep Dips (On Chair)
  • Plank
  • High Knees
  • Lunges
  • Push Up Rotations
  • Side Plank

Remember to have the exercises visible from where you are working out so you can check back during if needed.

It’s also important that the chair you are using for the workout is stable and safe. You need it to support your weight and also your movement.

Each exercise needs to be performed fully. No cheating!

Manufacturer Website and where to buy the years best fat burner: www.instantknockout.com

  1. Paul says

    Hey guys! Calorie calculator is being weird with me lol.

    But saw this list and thought it was pretty good. I was wondering why Grenade is underneath Instant Knockout though?

    I’ve not tried neither and am looking for something to help me with my diet in 2018. I weigh a bit too much at the moment.

    I’m doing 3 high intensity trainers but need more energy too. Is caffeine in a fat burner then only thing i need?

    I’ve 32 years old and live in Florida. I have been trying all sorts of fat burners and other supplements. Including warrior blaze on this list but that was too strong. Can you answer me some questions?

    1. Fat Burner James says

      Hello. Sorry about the calculator. We are still figuring that out.

      We recommend Instant Knockout every time. It’s not going to give you jitters and works pretty well. We have tried most of the fat burners in this list and hate stuff that gives side effects which are too strong. We’d recommend you check out our Instant Knockout review for more information.

  2. Hannah F says


    i have been seeing instant knockout absolutely everywhere when i look for fat burners for women. its even top of the 2018 fat burners for women list. i cant get away from it lol.ive been training for about 9 months now and am looking for something to help with energy and just give me an edge. i know i need stimulants but there is a lot off caffeine in the instant knockout fat burner.
    my question is, is will it make me go crazy having 4 doses a day? or is instant knockout the actual best fat burner of next year already? seems crazy again.
    i go gym 3 times per week only so dont need so much caffeine but maybe could drop the dose slightly if it would still work? if not do you have any recommendations for me?

  3. Mac says

    I’ve been looking at buying a fat burner supplement and have decided that the following ingredients are stuff I want in it. I have a high tolerance to stimulants when it comes to fat burning and so feel that these sort of ingredients will greatly increase my metabolism.
    1 Dmaa
    2 Caffeine
    3 Green Coffee

    Do you have any supplements here that can provide this level of metabolism increase and appetite supression without me trawling through endless lists of the ‘BEST FAT BURNER’ supplements lol!

    I used the warrior fat burner on your list which provided some good results. As it was quite stimulant heavy. I also train weights 6 times per week, so need the energy too.

    Look forward to hearing back.

    Don’t give me any diet pill nonsense either.

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