Instant Knockout vs SST v2X

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In this comparison, we’re looking at 2 premium supplements here, Instant Knockout vs SST v2X. Both fat burners are highly priced, so we’re only expecting the best from both products.

However, the big question, is which is better? We’ll be finding out further down in this review.

Both are claimed to promote:

  • Energy
  • Fat Loss
  • Raised Metabolism
  • Focus

One thing we realized, was that only Instant Knockout came advertised with the benefit of ‘appetite suppression’; this can make a big difference, to help you cut calories and reach your fitness goals faster.

However, we’ll check which nutrients have been added to both ingredients ourselves – to see which fat burner actually delivers on its claims.

Take a look:

About The Companies

Roar Ambition 

Roar Ambition are a specialist supplements company that markets only 3 products – a testosterone booster, a pre-workout, and Instant Knockout.

We like that they don’t create new products every year; instead, Roar Ambition are known for improving the formula’s in their supplements to keep up with modern research.


Performix are another premium company that take particular care in the appearance of their supplements. You can see by the fancy designs, that they want to be regarded as a ‘high-class’ company, and they definitely price their supplements this way.

To get our point across, SST v2X will set you back a massive $128.99 – making it the most expensive fat burner we’ve seen on the market.

As it’s almost doublet the price of Instant Knockout, we’re expecting SST v2X to blow Instant Knockout out of the water. And the only way to see, is by examining both nutrient profiles.

The Ingredients and How They Work


In this section, we’ll take a look at which ingredients both Instant Knockout vs SST v2X have in common. This will allow you to see which contains better dosages, to see which takes the early lead.

See for yourself:

Caffeine Anhydrous

We’re glad to see both fat burners contain caffeine anhydrous, because it’s the best stimulant you can find in the supplements industry.

Why? Answer: it’s a pure form of caffeine, so you know exactly how much you’re getting when consuming caffeine anhydrous – so you can keep a close eye on your intake to avoid jitters and crashes.

Both Instant Knockout and SST v2X contain the same amount of caffeine anhydrous, so we’ll call this a draw here.

Round 1 Results: Draw 

Black Pepper Extract

Now, this is most commonly used alongside salt, to enhance the taste of your food. But it’s actually more useful than for simply placing on top of your table.

Simply put, black pepper extract has the ability to improve the absorption rate of other ingredients it’s digested with.

What does this do? Answer: improves the overall effectiveness of supplements slightly.

As a result, we think that black pepper extract is a useful addition to many products. But at the same time, it doesn’t promote fat loss directly, so it’s not the best either.

Both products contain this is the exact same dosages again, so this is another draw.

Round 2 Results: Draw 

Unique Ingredients

Now that you’ve seen which ingredients are in both fat burners, we’ll take a look at which product contain the better ‘unique’ ingredients; this will really help you see the difference between Instant Knockout vs SST v2X, as so far, it’s been boring draws.

Instant Knockout


Green Tea Extract 

Instant Knockout has come out fighting in this round. Green tea extract is a tried-and-tested nutrient when it comes to burning fat – as well as improving your general health too.

But you still need to check whether it’s included in an optimal dosage; fortunately, Roar Ambition have done their homework, adding the optimal 500mg dosage into Instant Knockout.

Cayenne Pepper Extract 

At some point in your life, you’ve eaten a hot chilli before. What happened afterwards? You became a hot and sweaty mess, asking for some milk to cool you down.

Why is this beneficial? Answer: this raise in body temperature is exactly what boosts your metabolism, raising your fat burning potential.

The best thing is, you don’t even need to check the scientific studies to know that this ingredient works. Try eating one if you’re unsure, and you’ll get a nice warm sensation…


We’ve picked out glucomannan to examine here, as it’s the only ingredient in either fat burner to suppress your appetite.

How does it work? Answer: glucomannan is a low-carb and calorie fiber that safely expands in your stomach, helping you feel full for much longer between meals.

You might be thinking ‘but it doesn’t help me burn fat’. Well, while this might be true, glucomannan can play a key role at reducing your calorie intake (which will help you lose fat equally as effectively as increasing your metabolism, if not more).

As a result, while not many fat burners contain this nutrient, we’re happy to see that glucomannan is a key feature in Instant Knockout.




Safflower has been added into SST v2X, because it contains high amounts of CLA; this has shown to be great at helping you preserve lean muscle mass while you lose weight.

But there is some bad news…CLA hasn’t actually shown to help you lose fat. Not only that, CLA has been added into a proprietary blend, so you can’t even see if there’s an optimal dosage inside SST v2X.

However, everyone can agree that any help at keeping your gains while trimming the fat is a great benefit in a fat burner supplement.


While we’ve picked out the other nutrients for positive reasons, we’ve actually chosen Yohimbine for the opposite here.

Why is it bad? Answer: Yohimbine is known for causing harmful side effects, and has even been banned from use in certain countries as a result.

As a result, we can’t recommend that you consume this ingredient – especially when there are safe and effective options available (such as the ones we’ve listed above).

One thing we will acknowledge, is that Yohimbine has shown to promote fat loss. But it’s simply not worth risking your health for.


Synephrine is another negative addition to SST v2X. Similarly to Yohimbine, this has also shown to cause unwanted side effects – and has also been banned from some countries too.

Again, while synephrine has shown to help you lose fat slightly, we recommend choosing safer ingredients instead; there’s spending this amount of money on a supplement, if you’re at risk from side effects.

Round 3 Results: Instant Knockout 

Pros and Cons

Instant Knockout Pros: 

  • Optimal dosages of fat burning ingredients
  • No banned nutrients inside
  • Used by professional UFC fighters

SST v2X Pros: 

  • CLA can help preserve muscle mass
  • Contains good amount of caffeine

Instant Knockout Cons: 

SST v2X Cons: 

  • Contains banned nutrients that can cause side effects
  • Missing key fat burning ingredients (eg. green tea extract)
  • Contains more than 1 stimulant that can cause jitters

Side Effects

Roar Ambition have clearly taken time to formulate Instant Knockout wisely, as none of the ingredients inside are likely to cause any side effects.

The good news with SST v2X, is that it contains a good dosage of caffeine anhydrous. But as it also contains another stimulant (Theacrine), we can’t rule out the risk of you suffering from jitters.

Not only that, Yohimbine and Synephrine are banned in numerous countries (and in certain sports), due to causing side effects; these include nausea, high blood pressure, and diarrhea.

As a result, we believe that Instant Knockout has landed another blow at the end of this round here.

Round 4 Results: Instant Knockout 

Summary: Instant Knockout vs SST v2X

This battle started quite equally, with none of the products landing any punches; both contain the same amount of caffeine anhydrous and black pepper, so it was hard to award any points intially.

However, it’s when you look at the unique ingredients inside both products, when you realize which fat burner begins to shine.

Ultimately, it was Instant Knockout that came out fighting towards the later rounds; SST v2X was taken to deep waters, and couldn’t handle it.

As SST v2X contains some banned ingredients that are likely to cause side effects, we can’t recommend this fat burner. So we’re willing to give Instant Knockout the win, by unanimous decision.

Winner: Instant Knockout
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