Instant Knockout Vs Shredabolic Igniter – Which is the best fat burner?

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Instant Knockout vs Shredabolic Igniter

A good contest ahead of us as our Instant Knockout Vs Shredabolic Igniter review will crown a winner in the battle of the best fat burner.

With so many fat burners being produced, it is most often the case that they are produced to try and capitalize on a growing market, rather than providing a truly effective product. The two products we are looking at here, both arrive from reputable companies, who have a range of other products to their name.

With any supplements product, comes a list of big promises as they all look to gain your trust, these are slightly different fat burners though.

Instant Knockout is a true fat burner, delivered in capsule form and sticks to what a fat burner should do – burn fat.

Shredabolic Igniter, however, has gone for a different approach. Theirs is in a powder form and promises to burn fat, but also enhance focus and support anabolic strength, so a bit of mix of fat burner, nootropic, and pre-workout.

Let’s find out which is better at doing the following:

  • Burn Fat
  • Suppress Appetite
  • Provide Energy
  • Be Safe

Instant Knockout vs Shredabolic Igniter Who Makes These Fat Burners?

Roar Ambition

Instant Knockout Review

The people behind Instant Knockout are UK based and distribute from both the USA and UK.

They have an excellent reputation for customer service due to the fact that they have a generous money back guarantee and they review the ingredients list and dosages of their products regularly to ensure they are keeping up with the latest in supplement knowledge.

This fat burner is actually used by professional athletes and gym enthusiasts alike. None other than UFC fighter Diego Sanchez uses this product when he makes weight before a bout, so if it is good enough for the pros…

Body Fortress

shredabolic igniter reviewThis US-based company behind Shredabolic Igniter have a wide range of products and focus mostly on protein related boosts and whey products.

One of their brand ambassadors is former Mr. Universe Mike O’Hearn which Roar Ambition can compare to as they have former Mr. Universe Robby Robinson endorsing their T booster TestoFuel.

In terms of company information, there isn’t a lot on the Body Fortress site, we like to get to know the company a little, check out their story and see what they are about but no such like with this company it appears.

They do have some other good points in that they have some meal plans and training advice on their site.

Instant Knockout vs Shredabolic Igniter Ingredients

This is where it gets really interesting and the first thing to note is that it is good that neither product uses proprietary blends and all of the dosages are laid out for us to look into.

The serving schedule is better with Instant Knockout in our opinion. The suggestion is 3-4 capsules a day spread out. This is good because it means the fat burning effects will be working around the clock.

Shredabilic Igniters suggested serving is 1-2 times a day. This means the effects will wear off faster than that of Instant Knockout.

Mutual Ingredients

Green Tea

A great inclusion and found in many of our top recommended fat burners for a reason.

We like it not only because it is a proven and effective fat burner, but because it has multiple uses. This isn’t just because of the antioxidants which are great for your body, but because it can help burn fat in more ways than one.

It is a great thermogenic ingredient, this means it heats up the body causing it to burn fat to cool itself down.

On top of this it compliments an active lifestyle but enhancing the fat burning abilities of your cardio workout.

The 500 mg in Instant Knockout is an optimal amount, and the double scoop recommendation in Shredabolic igniter matches this.

Caffeine Anhydrous

Another effective fat burner, this will give you an energy boost which is good if you are complimenting a fat burner with a lower than usual calorie based diet.

The benefits don’t stop there though, this is a good metabolism booster giving you fat burning a real kick by using fat for energy. It has even been found to help the user focus. This form of caffeine is one of the easiest to absorb.

The 350g in instant Knockout is more likely to have a true effect than the 100 mg in the normal recommendation for Shredabolic Igniter, and the 200 mg double scoop.

Individual Ingredients

Instant Knockout Ingredients

Cayenne Pepper

A great ingredient for a fat burner in that it is a true thermogenic making your body burn fat even whilst you do nothing.

On top of this, it is also a very effective appetite suppressant, it swells in your stomach making you feel fuller for longer. The idea then is that you do not feel the need to reach for the snack drawer.

An ingredient that burns the fat you do have and stops you from putting more on.


Another great appetite suppressant.

This is a fiber that swells in your stomach once again giving the same effect as Cayenne Pepper. This is the sort of ingredient you only find in the better fat burners that have really done their research.

The dosage of 500mg is more than enough to have the desired effect.


One of those great ingredients that don’t directly burn fat but have a say in how effective the other ingredients are.

This is because it enhances their capabilities. Although the Instant Knockout nutrients are proven fat burners they work even better when complemented with an ingredient like Piperine.

Shredabolic Igniter Ingredients


This has been added as the protein synthesis traits helps the anabolic strength that this product promotes on the label.

Studies have shown that it works better with those who have lower amounts of protein in their system. We like the fact that they have tried something different here. The execution just needs to be a little better.


This is included in the metabolic support blend. Whilst it is for giving your metabolism a boost, it doesn’t come without a price.

The problem is, Syntherine has been banned in Canada as well as by the NCAA and other sporting organizations for a reason.

It is thought that when combined with caffeine (which is contained within Shredabolic Igniter!) it puts the user at risk of heart attack and stroke. These are the sort of potential side effects that we have to raise when it comes to supplementing such an ingredient.

Often known as bitter orange this is an ingredient you want to be cautious over as although it is effective in some ways, we would recommend staying clear.

Instant Knockout vs Shredabolic Igniter Side Effects

The good news is that Instant Knockout does not put the user at risk of any side effects. The natural ingredients, and safe dosages ensure that it is a fat burner that does what it is supposed to without putting the user at risk.

Shredabolic Igniter however contains the Syntherine and caffeine combination that is potentially risky for heart attacks and strokes.

This product also contains L-Tyrosine which is thought to raise thyroid production, putting anyone with a hyperactive thyroid at risk.

Instant Knockout vs Shredabolic Igniter Pros and Cons

Instant Knockout Pros

  • Appetite suppressant ingredients
  • Thermogenic fat burner ingredients
  • Zero side effects
  • Trusted company
  • Optimal dosages
  • Good caffeine level
  • No proprietary blends

Shredabolic Igniter Pros

  • Some decent ingredients
  • No proprietary blends
  • Some good thermogenics

Instant Knockout Cons

  • Only available online

Shredabolic Igniter Cons

  • Syntherine and caffeine can cause side effects
  • Serving schedule not optimal for fat burning
  • Some ingredients underdosed

Instant Knockout vs Shredabolic Igniter Review Conclusion

Winner: Instant Knockout

Instant Knockout Review

Whilst this looked like a decent battle on paper, in the end, Instant Knockout was a worthy winner.

It is good that neither of these products uses proprietary blends, we commend them for that but that didn't stop Shredabolic Igniter from having potential side effects through the inclusion of Syntherine and that is what put us off.

Having said that, Instant Knockout is a tough fat burner to beat. We have reviewed so many ineffective fat burners that just cannot compare to this supplement.

The fact is, Instant Knockout has a winning combination of effective fat burning ingredients, at optimal dosages and 100% natural ingredients, you can't ask for a lot more.

If you want to find out more about what this excellent fat burner can do for you, check out our in-depth Instant Knockout review...

Read our full Instant Knockout review

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