Best Fat Burners 2021

There’s no better feeling than looking in the mirror and seeing a shredded 6-pack…

There’s no negatives to having a rock hard 6-pack and body. And it’s one thing that everyone can achieve!

But if you’ve made excuses such as ‘I have a slow metabolism’ or struggled to lose that stubborn fat – then a quality fat burner is what you need.

Fat Burner supplements can change your physique by:

  • Helping you maintain muscle mass – don’t lose any hard earned muscle while you cut fat.
  • Boosting Your Metabolism – encourage your body to use body fat as fuel.
  • Quicker Results – achieve your dream 6-pack faster than before and increase your sexual attraction.

However, the problem is finding an effective product. Why? Because there are countless fat burners on the market – but not all of them work.

In fact, I’ve personally tried numerous fat burners that caused side effects such as jitters, energy crashes and nausea; the worst thing was, other review websites had recommended me the products!

This is exactly why I created; I want to expose the companies and review websites that recommend useless products – and point you towards the best options available.

For this reason, I’ve put together a list of the best fat burners on the market for you below.

Check it out:

Top Fat Burners #1 Burn Lab Pro #2 Instant Knockout #3 Hydroxycut Titanium
Burn Lab Pro bottle and box on a laptop with the LeanBulking website showing MuscleTech-Hydroxycut-Titanium-review
Overall User Rating: 5/5



Where To Buy: Buy Here Buy Here Available at a variety of vendors
Capsules Per Day: 2 4 2
Ships to: Free Worldwide Delivery
(Dispatched From Both US and UK – and to APO Addresses)
Free Worldwide Delivery
(Dispatched From Both US and UK – and to APO Addresses)
Depends on Vendor
Company Reputation: Excellent  Good Good
Money-Back Guarantee: 60 Days No BS Money-Back Guarantee
None. Depends on Vendor
Supports Thermogenic Fat Burning?: Yes – 5/5 Yes – 5/5 Yes – 4/5
All clean supplement facts label?: Yes – 5/5 (No artificial coloring, all natural capsule made from prebiotic fiber). Almost – 4/5 (Red capsules contain artifiical coloring). Not quite– 3/5
Helps maintain muscle mass?: Yes – 5/5 (Only fat burner to contain HMB and Coleus Forskolii). No – 2/5 No – 2/5
Price: $50.00
(Discounts on multiple boxes)
(Discounts on multiple boxes)
Side Effects: None Reported Some reported Some Reported
Read Full Review: Read Review Read Review Read Review

#1 Burn Lab Pro (Best Fat Burner 2019-present)

Burn Lab Pro bottle and box on a laptop with the LeanBulking website showing


LeanBulking Overall Rating:   
Ingredients Rating:  Excellent – 5/5
Side Effects:  None Reported
Effectiveness:  Excellent – 5/5
Best Deal:  $59 per box (multi-box discounts available on their site – $177 for 4 boxes)
Where I Bought From:

Here’s why Burn Lab Pro is my #1 Fat Burner in 2021:

  • Muscle sparing fat burner – I maintained much more muscle mass while cutting body fat than I would have naturally.
  • I halved my bodyfat in 8 weeks – I let myself go and was at 30% bodyfat before I knew it. But Burn Lab Pro helped get me back on track quickly.
  • From beer belly to seeing my abs! – After 8 weeks of taking this fat burner and working hard, I lost my ‘fat belly’ and could see the outline of my abs.
  • Impressive results, fast – I always say that the best supplements should deliver quick results. Burn Lab Pro was no exception.
  • Free from Side Effects – I didn’t experience any side effects (which was great as many other fat burners caused jitters & heart palpitations).


  • Can only buy on their official website – You can’t buy Burn Lab Pro in retail stores or Amazon.

Quick Summary

As you can see from my pictures on, I had managed to obtain a 6 pack before. However, towards the end of 2018 I let myself go (enjoyed drinking beer and junk food) – I’m only human!

I became really unhappy with what I was seeing in the mirror and began seeing great reviews for Burn Lab Pro appear online at the start of 2019. I also booked a beach holiday and didn’t want to be topless with a beer belly…

This was when I ordered myself 3 boxes of Burn Lab Pro. And it’s been one of the best decisions I’ve made this year!

After reading that Burn Lab Pro contained my favorite muscle sparing nutrients, HMB and Coleus Forskolii, which has proven to protect muscle mass while cutting body fat, I was confident that this fat burner would work.

I also stacked this fat burner with Performance Lab’s BCAA to ensure I would protect my muscle mass while cutting body fat the best way possible.

Then, I started following a calorie deficient diet plan, along with getting back on a strict weightlifting program…

I halved my bodyfat percentage in just 8 weeks (from 30% to 15%) while maintaining a surprising amount of muscle mass.

My colleagues in the office and friends outside of work were seriously impressed.

The best thing about Burn Lab Pro is that it doesn’t contain any caffeine. So, you can decide whether to take it with a stimulant supplement such as Performance Lab Stim – which I did when taking it before workouts.

You can’t argue with my results. This fat burner works.

No loss in muscle mass. No mood swings. No side effects.

Burn Lab Pro Before and After Transformation Pictures

(I halved my bodyfat from 30% to 15% in just 8 weeks!)

To Buy, Visit
– –


Read My Full Review
Burn Lab Pro Review

#2 Instant Knockout (Former #1 between 2017-2018)


LeanBulking Overall Rating:   
Ingredients Rating:  Excellent – 5/5
Side Effects:  None Reported
Effectiveness:  Excellent – 5/5
Best Deal:  $46.25 per box (with the ‘Ultimate Shredding Stack’)
Where I Bought From:

Here’s how Instant Knockout helped me:

  • Cut down cravings – I felt full for longer between meals, meaning I snacked less and reduced my calorie intake easier.
  • More motivated – I wasn’t short of energy for the first time on a cut, so I smashed my workouts and maintained strength.
  • Got abs – I shredded a 6-pack after 8 weeks of dieting and using Instant Knockout, for the first time in my life.
  • Faster results – Before using Instant Knockout, i’d tried to get abs for over 6 months but didn’t succeed. This helped me reach my goal much quicker.
  • No Side Effects – I didn’t experience any unwanted side effects during my 8 weeks of using Instant Knockout.


  • Can only buy on their official website – You can’t buy Instant Knockout in retail stores.
  • More expensive than other fat burners – I decided to pay more for better ingredients that work, than cheaper alternatives.

Quick Summary

After hearing that UFC fighters such as Diego Sanchez were using Instant Knockout, I decided to give it a go.

I’d always dreamed about having a 6-pack. Being able to take off your t-shirt in the summer and getting attention from girls (and respect from guys) – don’t deny it, it’s what everyone wants, it’s just hard to achieve normally.

However, Instant Knockout helped me achieve a rock hard 6-pack and body – quickly becoming my #1 fat burner on the market between 2017 until the end of 2018.

The best thing about Instant Knockout was this; it removed my hunger cravings – making it easier for me to cut calories and get abs quicker. I realized this was due to the glucomannan inside (which expands in your stomach, helping you feel full for longer).

I was also glad Instant Knockout didn’t cause any unwanted side effects. I’ve added a picture of me below, so you can see the exact results of 8 weeks with Instant Knockout.

Read My Full 
Instant Knockout Review 

#2 MuscleTech Hydroxycut Titanium


LeanBulking Overall Rating:   
Ingredients Rating:  4/5
Side Effects:  Some
Effectiveness:  3/5
Price Per Bottle:  $54,24
Full Review: Read review


  • Green Coffee Bean extract boosts metabolism
  • Good dosage of Caffeine
  • Black Pepper Extract improves digestion and absorption rate of supplement
  • No banned ingredients such as Yohimbe or Synephrine


  • Missing key fat burning ingredients (eg. Green Tea Extract)
  • Not good serving size (2 capsules per day)
  • No ingredients to suppress appetite
  • Can’t compete with the best fat burner on the market
  • Contains numerous ineffective ingredients
  • More expensive than other fat burners

Quick Summary

MuscleTech are well known in the supplements industry, and their Hydroxycut series of fat burners are well respected. However, as you can see, the most well-known product isn’t always the best.

Hydroxycut Titanium contains some great ingredients such as Green Coffee Bean Extract & Caffeine. But it’s missing key fat burning ingredients such as Cayenne Pepper Extract and muscle sparring nutrients like HMB and Coleus Forskohlii.

Ultimately, it’s the small things that can really make the difference. This is why Hydroxycut can’t compete with Burn Lab Pro, in our honest opinion.

Anyway, we believe Hydroxycut Titanium is still better than most fat burners on the market. So Hydroxycut Titanium deserves it’s 3rd place on this list.

Read Our Full
Hydroxycut Titanium Review –

Where do you go from here?

Any of these 3 products are a good choice. However, the one that really made a difference was Burn Lab Pro.


Because you can lose body fat naturally just by cutting your calorie intake. That’s the stone cold truth – although it might happen slower than if you used a fat burner.

However, if you simply cut your calorie intake to lose body fat, then you put yourself at risk of losing your hard earned muscle mass too.

This is where Burn Lab Pro comes in.

It’s the only fat burner to contain both HMB and Coleus Forskohlii. 2 of the most proven ingredients to help you maintain as much muscle mass as possible while on a cutting diet.

So instead of choosing a fat burner that only contains thermogenic ingredients, we’d go with Burn Lab Pro.

– To Buy our #1 Fat Burner, Visit: –