Instant Knockout Review


Last modified: November 2, 2022

  • Value for money
  • Ingredients
  • Effectiveness
  • Testimonials

Instant Knockout Overview

Instant Knockout fat burner is a cutting edge supplement containing only natural ingredients. Roar Ambition promises Instant Knockout will help you burn fat like the professionals.

This product is best used when having a good diet and training hard. If you are stuck at a certain weight a fat burner is the best product for you.

Top 10 Supplement Reviews rates this fat burner as the best on the market for men and women, based on our review of the ingredients, value for money, effectiveness and the quality of existing testimonials,..

If you wish to get completely ripped then this is definitely the product for you as long as you you stick to a healthy diet and train properly. Instant knockout works to bring out your abs, Lift heaver weights and helps to quit snacking, which is vital for your ideal body.

Instant Workout is currently being used by two of the best MMA fighters, Diego Sanchez and John Dodson.

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Do you need help choosing the right supplement for you , call us today on 0800 080 7887 and one of our team will be happy to help!

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What does Instant Knockout do?

Instant knockout works by using natural ingredients which are known to boost metabolism and faster metabolism, which means less fat storage.instant knockout

  • Boosts your body’s natural metabolic rate: This product works even when your resting, so you burn more calories even when your not working out!
  • Reduces hunger cravings: If you take it between meals it will help to reduce cravings which is ideal as it stops you eating sugary, sweet food which will contribute to fat storing which is not good!
  • Fuels energy levels: The natural ingredients in the product help to fuel your body through intense cardio workouts, gym sessions or even a simple walk.
  • Utilises ingredients with thermogenic properties to burn energy at a higher rate to use stored fats.
  • Fat oxidation to target fat stores and use them for energy.

Supplement review in short

  • Both Green Tea extract and Cayenne Pepper promote thermogenesis. Green tea has additional benefits in improving metabolism and cognitive ability thanks its amino acid and antioxidants.
  • Glucomannan helps to suppress appetite and feel fuller.
  • Vitamins included lower any chances of vitamin deficiency, helping the body to regulate weight better.
  • Caffeine improves fat oxidation and provides you with energy for working out.
  • Premium Pricing.
  • High caffeine content.
  • Not suitable for vegetarians contains gelatin.

Supplement Scoring

Value for money – 9/10

Instant knockout is a premium product that comes with a premium price, it is a little more expensive than most fat burners but with Roar ambition’s product, you’re getting what you pay for, results. Instant Knockout has been used by world-famous MMA fighters like Diego Sanchez to drop weight before a fight. He successfully dropped two whole weight classes before his comeback fight thanks to these little red pills. Roar Ambitions Instant Knockout scores a solid 9/10 for value for money.

Ingredients Score – 10/10

Roar Ambition has hit the mark with their choice of ingredients in this fat burner. To start, the mixture of Cayenne pepper and green tea extract target fat metabolism, energy expenditure, and thermogenesis, meaning an increase of which your body’s potential to burn fat even at resting.

If you have always struggled with your metabolism this is where instant knockout is for you, the dose of caffeine and green coffee bean provided increases your Basal Metabolism Rate (BMR). Do you find it difficult to say no to some late-night carbs? Instant Knockout helps here too, the active ingredient Glucomannan helps naturally take the edge off your hunger cravings.

Instant knockout includes vitamins and minerals like B12, B6, and zinc. These have all been found to aid the burning of fat while maintaining muscle mass. A further look into this products ingredients has been detailed below. As you can see Roar ambition has included a wide range of key ingredients that optimize your fat loss, hence giving them a well-deserved 10/10 for Ingredients.

Effectiveness Score – 9 / 10

Roar Ambitions Instant knockout was originally designed for professional MMA fighters to help with their weight cuts before a fight, but it has also shown to work for everyday ordinary people as well, showing incredible results in a short amount of time (see testimonials), therefore we scored them a 9/10 for effectiveness.

Testimonials Score – 9/10

Bellow, we have provided you with a few testimonials that have shown their experience with Instant knockout, and as you can see they have had some fantastic results. This supplement isn’t just for the hardcore gym rat juice heads, it’s a supplement for all. You don’t need to be worried about taking this supplement if you have little gym and fitness knowledge, as users vary in ages, gender, and reason for use. For these reasons, we scored Instant Knockout a 9/10 for testimonials.

Manufacturer Description

“A brand new natural fat burner with strong branding and an impressive unique bottle. It’s specifically been created and is branded towards the male fat loss market. Made for guys who want to get ripped or for those who just want to lose a bit of extra fat. The well-researched ingredients are natural and safe, making our product one of the best fat burners on the market. It’s a powerful formula that doesn’t contain any risky ingredients.”



  • Top quality fat burner.
  • Well-established and trusted manufacturer.
  • 90 days money back guarantee.
  • Lots of trustworthy testimonials.
  • Professional recognition from MMA and UFC fighters.
  • Natural ingredients.
  • Strong metabolic, energy and focus improving properties.


  • Not as cheap as some fat burners, but you pay for the quality.
  • Its high caffeine content means you should limit your daily caffeine intake to avoid insomnia and headaches.
  • Additionally, if you need to catch up on sleep, you should take your last dose about four or five hours before bedtime.
  • Contains gelatin, so it’s not suitable for vegetarians.
  • Although it is suitable for women, you must not take it if you’re pregnant.
  • Only available via websites.

Consumer Testimonials

Instant Knockout Review - Before Picture Before Instant Knockout Review - After Picture After
Testimonial 1

I found the price was not overly excessive, especially for a months supply and I was sold on the testimonials from professional athletes and MMA fighters.

Initially not expecting much, I started on day one with my morning pill just before breakfast. Within ten minutes I felt full without taking a bite, naturally I was a little surprised as I did not expect the appetite suppression to take effect so quickly.

I continued throughout the course, sticking strictly to my diet and consuming the four pills daily. I have since started the same plan again to really pin down the difference when I’m on it and off, there is clearly a big difference and my most recent eight week plan has been much tougher without the appetite suppression.

All in all I would highly recommend it to anyone struggling to stick to a plan, as much as discipline is important a well engineered supplement makes a world of a difference.

Testimonial 2

Deciding to try it, after trying several other fat burners and after tons of research, I took the leap. Boy am I glad I did!

I will admit the first couple of days I was on such a high it was hard to sleep. Eventually got used to it and continued with my weight training. I eat pretty well so i really didn’t change my diet.

Felt increased energy, stopped eating out of boredom and felt so much stronger at the gym. I was on fire!

Tried IK for 3 months and bought another 3 months worth. Even after the first 2 weeks I saw results. I was in awe!

If you are contemplating on trying it out I highly recommend it, it has helped me kick start my journey and I am now a bikini competitor. I can’t believe I was once 25kg heavier and now able to be on stage!

Thank you  for bringing out this product. You have really assisted me in reaching my goals.

Testimonial 3

“I was very sceptical as I have used many other fat burners without any results. I’m fairly active, working out six times a week and I was stuck in a place where I was no longer burning any fat or making any progress physically. I gave this a shot and was pleasantly surprised. The  results showed in a week! One month in I was so pleased with the results. BEST PRODUCT EVER! I think that everyone should try this product. It is worth every penny, and the company is willing to give you your money back if it doesn’t work for you. Its amazing and deserves to be given a chance.”

Testimonial 4

“I’ve always been very athletic. I played football in college and now I’m in the military and continue to work out and eat well. This year I made a lot of muscle gains, as well as putting on extra fat that I didn’t like. I’ve tried different fat burners over the years, most of them either didn’t do much or gave me side-effects, like a jittery feeling or made me feel depressed.

Whilst on the product I felt great! I felt a clean surge of energy throughout the day and on most gym days I didn’t even need to take my normal pre-workout supplement. When I’m doing a cutting cycle, I reduce my carbs and fat intake, which means I’m usually hungry and feel lethargic. It took some of the cravings away and gave me that energy I need to get through the day. I’ve lost 10lbs of fat and I feel great!”

Testimonial 5

Its the best fat burner, with no side-effects (even no headaches). It’s an amazing product. After my first bottle I noticed an increase in muscle definition, burning of fat as well as my energy levels during the day (and not only when I’m exercising in the gym).”

Testimonial 6

“I was finishing my final year in high school and I wanted to get “shredded” for college. I was never part of any sport teams, I just wanted to be a good-looking ripped guy on campus. Together with its great reviews and testimonials.

I liked that it has natural ingredients and I could see each individual ingredient, unlike most of the other fat burners. The idea of being able to cut fat but retain muscles sounded promising to me and so I thought it was the best choice. I worked out regularly six days a week for two hours each day. I had a very good diet that was full of protein and vitamins, and after three months the results are incredible. If you work hard and stick to the instructions, It will work! Anyone can use it – not just athletic young people.”

Testimonial 7

No, it’s not a “miracle cure all”, but it’s probably the next best thing. Add in the fact that it has natural ingredients and it becomes a no-brainier choice. I immediately felt more energy and my appetite was definitely suppressed helping me with my portion control. Not only did I lose weight and burn off that stubborn fat, but I also saw muscle growth and lifting gains in the gym, which is unheard of with most fat burners. I will definitely continue using it in my fitness journey. My advice is: don’t hesitate and just do it! You have nothing to lose from this decision except that extra bit of fat!”

Video Testimonials


Is Instant Knockout safe, are there any side effects?

Instant Knockout only contains ingredients that have been thoroughly tested (Read the ingredients above for more detail). Thus, as long as you aren’t allergic to any of the ingredients, your safety is assured by Instant Knockout.

How do I take Instant Knockout?

Instant Knockout recommends that you take 4 capsules a day. Since each bottle contains 120 capsules, each bottle should last you 30 days. Capsules are most effective when taken throughout the day with adequate space between each one. This way, your body is burning fat for a longer period of time and also has the time to fully absorb each capsule. For reference, it would be a good idea to take them at these four points of the day;

  • First thing in the morning
  • Just before you have your lunch
  • In the afternoon
  • Before your evening meal
Does Instant Knockout contain stimulants and will they keep me up at night?

Instant Knockout contains stimulants so it is important that you don’t take them just before going to bed. The recommended time to take them in the evening would be 5 hours before you go to bed. That way, the effects of the stimulants will have worn off and your rest will not be disturbed. Rest is vital to your body and it should be respected and valued.

Can I take Instant Knockout at the same time as taking other supplements?

Yes. Although it should be noted that if your other supplements contain lots of stimulants then it is best avoided. This is because you can easily feel many different side effects from an overdose of them. It is essential that you know all the ingredients of every supplement you take for these reasons.

In fact some users have been known to take a course of TestoFuel for quite a few months before using Instant Knockout. This is so that they can intensify their workouts and get real strength gains before using Instant Knockout to burn all their fat. Thus they are left with a desirable shredded look.

If I take Instant Knockout will I simply lose weight?

As with all fat burning supplements, you should diet correctly and exercise rigorously for the best results. Having said that, you should technically burn off more calories than you usually do just by taking it! However, the results aren’t likely to be noticeable because if you are eating too many calories anyway then you will not lose weight.

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What's in Instant Knockout

green tea extract

Green tea extract – 500 mg

Tea made from leaves that haven’t been oxidised of the plant Camellia Sinensis.  Green tea improves mental alertness and thinking. It improves cognitive function through L-Theanine, which is an amino acid within green tea. The caffeine content of green tea is typically 2-4%. Green tea intake also produces an effect on the decrease in percentage of fat mass. Since green tea is one of the less processed types of tea, it contains a high concentration of antioxidants and beneficial polyphenols.


Cayenne pepper – 100 mg

Ground Cayenne Pepper

A hot chilli pepper of the Capsicum genus. Cayenne pepper is a close relative of paprika, jalapenos and bell peppers. It originated in the Americas (Cayenne is the capital city of French Guiana). The benefits of Cayenne pepper are as an appetite suppressant, and as a thermogenic ingredient. A Purdue University study shows thermogenesis would in turn burn calories. With regards to weight loss properties, the main targets of Cayenne pepper are fat metabolism, energy expenditure, and thermogenesis (the production of heat in the body).



Glucomannan – 1800 mg

Derived from the Konjac plant, Glucomannan is a water-soluble sugar widely described as a dietary fibre and as a bulking agent. When consumed it absorbs water in the digestive tract, reducing carbohydrate and cholesterol absorption, this aids weight loss. Supplementing with Glucomannan has promoted weight loss in overweight adults. Supplementing 3 to 4 grams a day of Glucomannan, has promoted weight loss in overweight adults, with or without calorie restriction. While 2 to 3 grams per day was effective in a group of obese adolescents in another controlled trial.

caffeine anhydrousCaffeine anhydrous – 300 mg

Caffeine is easily the world’s most recognised stimulant, being present in coffee, tea, colas and energy drinks. Its main source is coffee beans (and tea leaves). Caffeine anhydrous has no trace of water, and is therefore a “pure hit”. The recommended daily dosage is 3-6 mg. Studies have shown that, prior to exercise, ingested caffeine significantly elevates fat oxidation rates as well as performance [7. A.E. Jeukendrup & R. Randell, Fat burners: nutrition supplements that increase fat metabolism, Obesity reviews, Vol. 12, issue 10]. Caffeine also increases the product of heat, and reliably increases the state of wakefulness.

Vitamin B6Vitamin B6 – 5 mg

An “all-rounder” in the vitamin world, vitamin B6 is naturally present in many foodstuffs and performs a wide variety of functions in the human body, though its main benefit may be seen by many as a controller of blood sugar levels. Vitamin B6 is sometimes known as pyridoxine. The recommended daily intake in adults is 1.3-1.7 mg.

However, this does not mean that vitamin B6 does not work in this regard; it only means that this effect has not been studied in a large, randomised, placebo-controlled, double-blind study. A number of weight loss programs recommend vitamin B6 supplementation. While there are only a few evidences to point to the usefulness of vitamin B6 for this indication, it may contribute to weight loss nevertheless. However, it should not be the mainstay of your weight loss program.

By promoting the conversion of glycogen to glucose, vitamin B6 increases the energy level of the body without the need to ingest more carbohydrates. In this way, vitamin B6 reduces the amount of calories ingested into the body while burning up more of the calories stored up in the body.

Vitamin b12Vitamin B12 – 10 mcg

Structurally this is one of the most complex of the B vitamins. As an ingredient for fat burners, Vitamin B12’s role is mainly energy metabolism (it helps convert carbohydrates into glucose, which is used as fuel for energy).

Due to its role in energy metabolism, vitamin B12 is frequently promoted as an energy enhancer and an athletic performance and endurance booster. These claims are based on the fact that correcting the megaloblastic anemia caused by vitamin B12 deficiency should improve the associated symptoms of fatigue and weakness. However, vitamin B12 supplementation appears to have no beneficial effect on performance in the absence of a nutritional deficit [10].

ChromiumGTF Chromium – 100 mcg

Found naturally in many fruits and vegetables (broccoli springs to mind instantly), chromium is a metallic element that helps insulin transport glucose into cells. This is then used to be used as energy. Two forms are usually seen in supplements: chromium picolinate and glucose-tolerance factor chromium. It’s the latter we’re interested here, which is frequently used in supplements relating to weight-loss and bodybuilding. The daily recommended dosage in adult males is about 35 mcg; in females it is 25 mcg.

Taking chromium alone (or along with other supplements) seems to reduce levels of blood fats in people with high blood fat [11]. Some early evidence suggested taking chromium while participating in resistance training can increase weight loss, body fat loss, and lean body mass [11].

zinc supplementZinc – 10 mg

Everyone’s heard of zinc, but what are its benefits? Because zinc comprises a plethora of enzymes, it’d be spurious to claim they all play vital roles in human activity. That said, optimum zinc levels generally indicate a healthy individual (indeed, on the opposite scale, low zinc levels can be observed in people with a poor (or restricted) diet, the elderly, and in alcoholics). Zinc plays a role in protein synthesis, and is found in a variety of foodstuffs I.e. Oysters are a good example of high Zinc content. Low levels of zinc are also associated with low testosterone levels in men [12].

PiperinePiperine 10 mg

Piperine is an organic compound, and one of the bitter-tasting constituents found in black pepper. In short, there is evidence that piperine can block the formation of new fat cells. It can be summed up thus: “Analysis supports the role of piperine in regulating genes associated with lipid metabolism. Overall, these results suggest that piperine, a major component of black pepper, attenuates fat cell differentiation by down-regulating PPARγ activity as well as suppressing PPARγ expression, thus leading to potential treatment for obesity-related diseases.” [13].

Green coffee beans – 100 mg

Green Coffee beans

Green coffee beans have been lauded in the past few years by celebrities and on TV shows as the next big weight loss miracle.

Now we’ve got that out of the way, here is the important stuff. The beans are green because they haven’t been roasted. They are rich in chlorogenic acid, which is an ester of caffeic acid (found in coffee). They are thought to help reduce the formation of glucose in the liver, and evidence seems to indicate that the intake of green coffee extract can promote weight loss [14].

Studies on mice in Korea revealed that chlorogenic acid significantly lowered body weight, visceral fat mass, and insulin levels compared to a high-fat control group [15]. The conclusion was that the results suggested both caffeic acid and chlorogenic acid improve body weight, lipid metabolism and obesity-related hormone levels in high-fat fed mice. Chlorogenic acid seemed to be more potent for body weight reduction and regulation of lipid metabolism than caffeic acid [15]. Chlorogenic acid may also reduce blood sugar levels, therefore reducing food cravings.

Our Verdict

A superior fat burner with the industry credentials and ingredients to back up their claim as one of the best products out there. Users have reported impressive results (i.e. less body fat) in 2-4 weeks without deviating from their usual diet or exercise routine. Taking the recommended four capsules a day shouldn’t be too difficult, but you need to remember to do it! Everyone is different, though, so you may want to take it three times daily to see how your body reacts. This could well be the product that changes your views of fat burners – and changes your life.

What improvements would we like to see?

The only two improvements we can think of is the price is quite high but this is usually common in a premium supplement. They could’ve lowered the amount of certain ingredients to improve the overall strength of others so that it packs more of a punch but it is still certainly still a heavy-weight fat burner.

Is Instant Knockout a scam or a top fat burner?

As with most long running top supplements this product has been hit with numerous accusation of being hyped up or a scam, personally we believe this product is more than just a scam. With a solid list of effective fat burning ingredients that tackle weight loss  from a number of angles I.e. thermogenic properties allow for increase weight loss while the supplement also suppresses appetite. Overall, its hard to judge, though we do think the supplement could do with a boost in dosage for some ingredients we do still think that it provides a healthy enough amount of nutrition for users to remain healthy and operate at an optimal level, providing aid while on their weight loss journey.

How you can get the best results from instant Knockout

No fat burner works without work from you! The same goes for Instant Knockout, you won’t see the results you desire without incorporating a strict diet and workout plan. By ensuring you do both of these things you should be able to see results around 3-4 weeks and will be able to reach optimal weight loss results after a couple of months. Remember that even with exercise the process of losing weight isn’t an easy or quick task, people often give up because they haven’t seen weight loss results they had wished to see.

Articles related to this review

So, fat burners can be quite confusing and if you factor in the other areas of weight loss you can find yourself quite puzzled. To help you we have create a useful all in one weight loss and fat burners guide to provide you with the key weight loss information. The majority of weight loss centred around your diet, take a look at our 5 tips to succeed in your diet. Learn how low fat diets can aid your body in curing diabetes. Looking for an alternative? Take a look at our top 10 fat burners. Want to get rid of your stubborn body fat? Read our tips on how to lose body weight. A great way of ironing out stubborn belly fat is by building your abdominal muscles, for advice on how to build your abs read our abdominal exercises article.

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