My Instant Knockout Review

My Instant Knockout Review

Instant Knockout has been on the market for a few years now and that time period is a testament to how effective it is at helping thousands, if not millions of customers around the globe burn more calories to get the body they want.

This fat burner is loaded with proven ingredients.

LAST UPDATED: May 2019 by Ben.


Instant Knockout Fat Burner Review

What’s so good about Instant Knockout Fat Burner?

Many people find it difficult to shed fat and it is probably why you are here now reading this review, one of the main questions asked is:

 “How to build muscle and burn fat?”

It is widely known that unless you have surgery you cannot dissolve localised fat deposits i.e. doing just sit ups for hours on end will not simply reduce belly fat.

However, many people still do not fully understand this.

Therefore numerous products have come on to the market to help people metabolize those unwanted gains.

Some of these products are greater than others and started life on the market not necessarily for Joe public…one such product is Instant Knockout by Roar Ambition.

Professional Athletes

Instant Knockout was originally developed for pro MMA fighters and boxers.

It’s being used by UFC fighter Diego Sanchez to cut his weight from 190 pounds to a featherweight 145 pounds which you can see below, as you will see, it is an impressive product.

Therefore I felt after using it that I should do my own review of Instant Knockout because I am now in my mid-thirties and I find it harder to lead an active lifestyle as the younger version of me did.

I find that it is hard to maintain energy or the focus to hit the gym as often as I could and for longer periods of time.

This is just due to more priorities taking over.

There’s work to do, the house to look after and maintain and people to see.

I know that I am not alone.

People work 60 or even 70 hour weeks. People have two or more jobs to keep payments on time for cars, bills and other responsibilities.

Plus there is the worry of health insurance premiums being higher if our BMI is higher!

TL:DR – Video Review

Instant Knockout Claims

Instant Knockout do not seem to be making any wild claims. It is nice and simple, and if works, is exactly what we are looking for.

So, here are their claims:

  • Increase metabolism
  • Suppress Appetite
  • Cut cravings

What can a fat burner really do?

You may well be surprised actually.

The idea that an effective fat burner just magically makes your waist smaller is far from the truth.

However, only the effective fat burners contain a number of ingredients in correct doses that work harmoniously and through a number of outcomes help you lose fat mass, not muscle.

Their benefits include, but are not limited to:

  • Increase energy – This will help you be more active and stimulate you for effective workouts
  • Thermogenic – These ingredients will increase the temperature of your core which increases calorie expenditure
  • Appetite control – The ability to feel fuller and not to fall for sweet, calorie laden treats

As a result I tend to supplement my exercise regime with a fat burner supplement.

I have found Instant Knockout to offer the best results and as a result I try to use that daily.

Instant Knockout …tell me more

The packaging is crisp, clean and professional looking.

Time and money has been spent on the design even to the point that the bottle is shaped like a fist…a nice little acknowledgment to the MMA element in its conception.

This reflects well on the product.

Usually a well designed package means that the manufacturer is proud of their supplement and they want it to look unique.

It certainly stands out from the crowd, anyway.

Instant Knockout Ingredients

Roar Ambition are here to make an impact on the supplement world.

All the ingredients delivered straight up clearly stating the facts with good, solid instructions and with no proprietary blend like some other lesser products out on the market.

All the ingredients listed are natural and proven to metabolize fat burn.

The product is natural, safe and is backed with plenty of research studies; if it is good enough for a UFC fighter to drop a weight it is for us mere mortals!

  • Vitamin B12
  • GTF Chronium
  • Vitamin B6
  • Green Tea Extract
  • Zinc
  • Green Coffee Extract
  • Cayenne Powder
  • Glucomannan
  • Caffeine Anhydrous
  • Black Pepper Extract

Let’s take a look at the studies…

instant knockout fat burner ingredient panel

– Cayenne Pepper Seeds

The hot and spicy taste of cayenne pepper comes from capsaicin, a compound found in many hot peppers.

Capsaicin is known to boost metabolism, causing the body to produce extra heat and burn more calories for fuel.

Thermogenics are responsible for getting rid of those last remnants of body fat that most people find difficult to lose.

This is because they also help provide you more energy, in some cases it can be quite strong and you feel the need to get up and do something active.

– Zinc

A study in 2013 showed that people suffering from obesity had low levels of Zinc.

Also, if you are deficient in Zinc it means you cannot absorb the nutrients from your food in the intestine. [1]

– Green Tea

A well known to have many powerful health benefits. Clinical studies suggest that green tea extract may boost metabolism and help burn fat.

One study found that the combination of green tea and caffeine improved weight loss and maintenance in people who were overweight and moderately obese.

Some researchers think that substances in green tea known as catechins are responsible for the herb’s fat-burning effect.

It has been shown to help lose almost 5% body weight over a three month period.

Green tea extract is found in many a good fat burning supplement.

Not only that, but Green Tea has demonstrated its effects at suppressing cellulite.

This contains about 4 cups worth of green tea per day. This is a perfect alternative if you don’t like the taste.

– GTF Chromium

Research suggests that chromium might improve weight loss in some people who are overweight or obese.

It also helps move glucose from the bloodstream and in to the cells for energy. [2] [3]

– Glucomannan

This is a soluble, fermentable, and highly viscous dietary fiber derived from the root of the elephant yam or konjac plant, which is native to Asia.

Evidence suggests that Glucomannan can promote weight loss with good results for those who are suffering from obesity.

It can help maintain a healthy digestive system, treat constipation, and help reduce high cholesterol levels.

If you don’t get a lot of fibre in your diet, it is well worth adding in.

– Green Coffee

Evidence from research has indicated that the consumption of caffeinated coffee can lead to some reductions in long-term weight gain, an effect which is likely to be due to the known thermogenic effects of caffeine intake.

Not only that, but chlorogenic acid has a big role which is found in green coffee. [4]

– Vitamin B6

Using it in its most natural form, pyridoxine, B6 is an essential nutrient to raising the body’s metabolism and aiding the fat burning process.

Your body cannot store an excess of B6 so it needs to be replenished often for best effects.

This way it can help your aid the metabolism of carbohydrates and fats.

Studies demonstrate its overall benefits and contribution to fat loss.

It is important to understand that our body cannot store B6, and it is passed easily so we need to a daily supply and it is best to supply that over the course of a day.

There’s as much B6 in this fat burner as 15 ounces of beef liver!

– Black Pepper Extract

Black Pepper is a source of piperine, a molecule that does not do much on its own but can inhibit enzymes that would attack other molecules.

Due to this, it is ingested alongside some supplements to increase their absorption rates. [5]

– Vitamin B12

B12 fights fatigue, muscle wastage, boosts mood, cognition and is vital to many bodily functions including metabolism and food digestion.

So to put it bluntly, we need this for smooth operation and be able to smash those workout sessions which in turn helps you burn fat and lose those unwanted pounds.

Studies have shown that those lacking in B12 scored lower in cognitive testing.

With further analysis demonstrating positive effects against cellulite.

The amount of B12 in Instant Knockout is the equivalent to 12 ounces of canned tuna.

– Caffeine Anhydrous

The purest form of caffeine available. This compliments the green tea and coffee plus the thermogenic effects of cayenne pepper.

It stimulates the central nervous system (CNS), heart, muscles, and the centers that control blood pressure to give you an extra boost and hit that PB.

Caffeine has also been noted to help suppress and treat cellulite.

Caffeine also increase resting energy expenditure. [6] [7] [8]

There’s the equivalent of over 5 shots of espresso here.

It is worth noting that the product is manufactured in the USA in FDA and cGMP certified facilities.

How to take Instant Knockout

4 pills per day; immediately when you wake and then with every meal. 4 pills spread evenly throughout the day is the optimum dose.

It constantly and consistently provides your body with all of the ingredients required to raise metabolism and burn fat.

The is important, because, if you get too much of certain ingredients, that what the body doesn’t need at the time will be wasted and you will not feel the benefit.

Therefore, if you have a massive dose of Zinc for instance yet your body is still processing and utilizing Zinc from a meal you’ve recently had it will only use what is required.

What the body doesn’t require at the time will let it pass. Thus, a higher chance of waste and less benefits.

There is a 30 day supply with every bottle.

This product is great for both men and women too!


One bottle is $59.

However, there are multi-buy deals whereby you can get one bottle free and a tee shirt.

There’s free global shipping too!

Instant Knockout Discount

The more units you buy, the cheaper it gets.

In fact, you can receive up to a 25% discount if you purchase 4 bottles at once.

There’s also a 90 day money back guarantee if you are not satisfied with your purchase.

Is Instant Knockout for Females?

Yes. Women can benefit from the benefits of Instant Knockout to burn fat.


This is a carefully thought out formula using ingredients which are known to boost your metabolism, suppress your appetite and burn more of your stored fat as energy.

Each and every ingredient present is able to help raise the body temperature and in turn expend more calories.

More calories burnt means you are closer to the deficit which is required to lose fat.

Within three months you should start to notice more whole body muscle definition and more energy, there is even a money back guarantee with multi-buy offers which lowers each individual unit price.

It is also great for women to use as well. Even though this is a really strong product, it is easy to gauge your limits.

If we take a look at these ingredients it is obvious to see why this is the current leader of that pack.


We have Cayenne Pepper which is able to increase body heat, as a result it increases calorie expenditure.instant knockout with healthy meal

Caffeine and Green Coffee also have known thermogenic effects creating more body heat which has an even bigger impact on burning cutting those calories down like a lumberjack!

The catechins in Green Tea work with Caffeine to produce a fat burning effect that is widely regarded and features in many fat burners supplements.

Glucomannan and Chromium have both started to hit the headlines as it offers fat burning effects to help with shedding unwanted weight gain, particularly for people who are suffering from obesity.

B vitamins such as B6 and B12 help raise the metabolism, promote healthy bodily function and create energy for your early morning workouts.

Zinc helps people absorb nutrients from food and those who are obese are low in Zinc.

Black Pepper (Bioperine) ensures that your body absorbs these nutrients to make the most of them and be effective as possible.

There’s also studies that suggest that a combination of ingredients such as green tea, caffeine and capsicum are effective at burning fat.

‘…In conclusion, treatment of overweight, and thus prevention of obesity, requires a multifactorial approach. This may be possible by applying sympathomimetics such as caffeine, ephedrine, capsaicin, and green tea…’ [9]


The best deals can only be achieved by buying three bottles at once which is from the manufacturer direct, so no popping in to your local drug, GNC, Vitamin Shoppe or fitness store to grab an emergency bottle.

The product contains caffeine which can cause issues for some people and there is a fairly strict timetable to take each dose and it should not be less than 5 hours before bed.

This can take some careful planning, it has caught me out a few times when I am extremely busy with work and rugby.

Due to the capsule being produced from gelatin it is not suitable for veggies.

It does miss a couple of other ingredients that I would like to have seen such as Vitamin C and Fenugreek.

Instant Knockout Side Effects

Instant Knockout is safe to use, however, just be sure to follow the instructions and do not take a whole bottle of the supplement in a day or anything else silly.

I have listed a few things to look out for, but these are rare:

  • Caffeine

If you take way too much caffeine it can cause issues such as insomnia, headaches and anxiousness.

  • Cayenne

This could potentially increase bleeding before or after surgery. Ensure that if you have any operations you lower the dose or stop beforehand.

My Instant Knockout Results

instant knockout fat burner results

My Instant Knockout Review Conclusion

As with many people (apart from hard gainers) I find it much easier to build muscle rather than shed fat.

For me it is simple and much more enjoyable to hit my squat rack in the garage and do some big lifts instead of getting on my bicycle or going for a 30 minute jog in the rain.

As a result, you can lose that cut and shredded look that you truly want, especially in the warmer months.

However, since using Instant Knockout I have noticed extreme definition in my legs, chest and found my stomach to look much leaner as well as the area around my ribs.

I do not to do any isolated stomach exercises and rely mainly on my core lifts to strengthen and build my stomach muscles and since using Instant Knockout those muscles are now exposed.

One thing to note though, I wasn’t too keen on is the jittery feeling I got from taking it.

i love my coffee too so doubling up on the caffeine wasn’t great and I had to ensure I cut my coffee intake (probably for the best).

The manufacturer’s do a great deal of buying three with one free plus a free tee shirt.

If not, bottles can be bought separately. It costs around $59 / £35 for a month supply, if you buy them individually.



Overall I am really happy with the results. Instant Knockout combined with my cycling to work plus a ‘cleaner’ diet has helped me shift the unwanted fat I had gained when I was commuting 120 miles per day in the car.

However, I do eat my ‘cheat’ meals at the weekend plus I am partial to drinking quite a lot of alcohol during the weekend and even the odd glass of wine throughout the week.

Even so, with these naughty flaws of mine I am still able to lose the fat…

Therefore, if you are strict and have more will power your results will be better than mine!


Hear what others have to say about Instant Knockout…

The supplement industry is full of charlatan products containing ill research ingredients, unproven ingredients, low doses, proprietary blends and even dangerous ingredients.

And, as with medicines and other drugs, different supplements will have different effects on different people.

However, take aspirin for example. Aspirin will have a slightly different effect on person A compare to person B.

However, across the board the majority of people will all be able to take advantage of the benefits of aspirin with no harmful effects and just reap the rewards.

It is the same when it comes to choosing supplements.

We all know aspirin is effective and safe when taken as instructed. This is because millions have benefited from it.

So, when looking for a supplement, make sure you are able to research the ingredients and their effects, also look to see if other people are benefiting, too.

So, take a look at others’ feedback on Instant Knockout

Not to be out done by the ladies, Jeremy saw some really impressive results, too and was keen to get them heard online.


I have seen Instant Knockout on eBay cheaper, do they have an outlet?

No. Counterfeits are common for everyday items from handbags to vodka.

Instant Knockout is only available from their website. Do not risk buying a counterfeit which could be unsafe or just not effective.

Is it safe to buy from Amazon?

No. Once again, only Instant Knockout bought from the website is genuine and guaranteed.

Instant Knockout in GNC? 

The guys at IK keep the price as competitive as possible and take out the middle man, such as large retailers like GNC, Holland and Barrett plus Vitamin Shoppe.

What if I do not like it?

There is a 90 day money back guarantee.

Once you have my bank details will Instant Knockout send out a repeat order automatically?

No. Instant Knockout does not send out automatic repeat orders.

Is Instant Knockout like Clenbuterol?

No. Clenbuterol can be unsafe. Instant Knockout works by increasing your energy levels so you are more likely to hit the gym rather than sit in front of the TV and raises your metabolism by using thermogenic ingredients that raise body temperature.

Is Instant Knockout safe and legal?

Yes, absolutely safe and legal.

Can women take Instant Knockout?

Absolutely. Women can also benefit from taking this fat burner which contains all natural ingredients.

Are there any cheaper deals?

Instant Knockout keep prices as competitive as possible so offer multi-buy deals so you can benefit more.

Alway be sure to order direct, do not be tempted by anything found on Craig’s List, Amazon or eBay for your safety and to ensure you are not wasting your money.

Best Deal For Instant Knockout

Instant Knockout Rivals

Let’s see what other best rated natural fat burner supplements are pitched against Instant Knockout.

Instant Knockout vs Lean Bean

Okay, Lean Bean may look extremely effeminate, and you would be correct.

Its color scheme is all directed at women, that said, I love a pink dress shirt.

However, if you look past the pink and the heart logo you will find an effective fat burner that is suitable for both men and women.

This offers some stiff competition that looked to take Instant Knockout’s pole position.



  • Contains nine clinically proven ingredients to help stimulate fat loss
  • Contains anti-inflammatory ingredients to help prevent chronic disease
  • Green tea can help treat cellulite


  • Three ingredients of a total of twelve are not proven to cut fat
  • Lacking Caffeine

Pretty Fit Lean vs Instant Knockout 


Pretty Fit Lean is another natural fat burning supplement that is marketed towards the female end of the spectrum, and it seems like the ladies are getting all of the good supplements at the moment.

Pretty Lean Fit includes numerous well established and proven ingredients without any proprietary blends hiding what lurks beneath.

We appreciate honesty and transparency, this has that for the consumer as well as providing some great results.

Good for men, too.


  • High doses of Green Tea to help suppress cellulite
  • Includes Synephrine which cuts fat
  • Carnitine helps provide energy to run that extra mile


  • Fewer number of total ingredients included per dose
  • Omits a couple important ingredients such as B vitamins

Instant Knockout vs Hourglass

hourglass female fat burner

Hourglass may scream ‘female fat burner’ to you, and you would be right.

This is directed and marketed at women.

There is nothing wrong with that. I am more concerned with the ingredients, doses and overall effectiveness than a name or branding scheme.

Hourglass is new to the shelves and is making noises for all of the right reasons.

It is darn effective at helping you lose unwanted fat mass.

Check out the new girl on the block and feel the benefits.



  • Contains nine clinically proven ingredients to help stimulate fat loss
  • Contains anti-inflammatory ingredients to help prevent chronic disease
  • Green tea can help treat cellulite


  • Three ingredients of a total of twelve are not proven to cut fat
  • Lacking Caffeine









[8] Int J Cosmet Sci. 2006 Jun;28(3):175-90. doi: 10.1111/j.1467-2494.2006.00318.x



> Increase metabolism

> Increase Energy

> No banned ingredients

> Thermogenics

> Get the BEST deals

Rating: 5
Review Date
Reviewed Item
Instant Knockout Fat Burner
Author Rating

Ben BA(Hons), PGCert

Ben established this site to be a free resource in 2015. Since then it has gained over half a million visits. He has always been interested in sport and he started playing rugby at the age of 6 represented his town, county and school. Ben also enjoys cycling, has started skiing and is in the Army Reserve representing his Regiment as part of the 150 Regimental Shooting Team. He holds a bachelor's and postgraduate degree in sport exercise & nutrition.

10 thoughts on “My Instant Knockout Review

    1. Ask your medical professional and show them the full list of ingredients.

      There shouldn’t be any adverse interactions but just check with them first as they know what the prescribed medicine is.

    1. Hi James,

      Yes, absolutely. This will enhance the fat cutting effects that TestoFuel can have.

      Let us know with your progress.


    1. Yes, not a problem. I have been.

      Although I do not tend to use much whey protein that much these days as I find much of my diet contains the protein I need.

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