Instant Knockout Review – Top Rated Fat Burner

Last updated on October 10th, 2019

Instant Knockout




Formula / Ingredients


Safety Rating


Customer Feedback


Value For Money



  • Science backed ingredient profile
  • Very effective fat burner
  • First class testimonials and endorsements
  • Brilliant marketing
  • Long money back gaurantee


  • Green tea dose a tad low
  • Single bottle orders can be pricey (less so when ordered in bulk)

Instant Knockout Fat Burner Review

Instant Knockout is a powerful unisex fat burner that has its roots in the fighting sports but has since grown to be one of the most respected weight loss and pre-training aids on the market.

We have includes some real results and real before and after pictures (scroll down)

Instant Knockout is ideal for:

  • Competition bodybuilders to cut fat – cutting cycles
  • Anyone who trains looking to reduce body fat
  • Anyone who wants to lose weight permanently 
  • Men and women of all ages

The capsules are red and the bottle they come in is shaped like a fist. Everything about the way the product is presented screams raw power.

Although a powerful marketing strategy doesn’t guarantee a powerful product, Instant Knockout appears to be the real deal. Customer reviews are incredibly good.

Instant Knockout was unleashed into the fat-fighting arena by a Roar Ambition. The company originally developed the formulation to support the unique needs of professional boxers and Mixed Martial Arts (MMA) fighters.

However, levels of obesity are increasing all over the world and the company realized their product has a greater potential. So Instant Knockout is now available to any man or woman who has some fat-fighting to do.

Unfortunately, the product’s hardcore appearance scares a lot of women away.

That’s a great pity because Roar Ambitions punchy fat burning formulation works equally well for members of both sexes. Furthermore, there are plenty of customer reviews and Instagram photos that prove it.

Apart from being a powerful unisex fat burner, Instant Knockout also offers a lot of value as a pre-workout supplement. Past and present users report experiencing a massive energy boost.

Don’t let the product’s history mislead you. It’s not just for people involved in fighting sports. Lots of bodybuilders use it for cutting or providing a pre-training energy boost. There are also many Instant Knockout users who never go near a gym.

Let’s face it, people want to burn their fat for different reasons. It does not matter why this product was created. The important thing is that it works.

Instant Knockout Buying Info

  • Orders are via the official website only. You can buy in your local currency ($, €, £ and AUD$)
  • Buy 3 and get 1 FREE special offer is now available
  • There is free shipping to anywhere in the world

Click here to visit official Instant Knockout website and view special offers

Instant Knockout Features

  • High-quality natural ingredients
  • Manufactured in FDA and GMP certified facilities
  • Celebrity endorsements
  • Excellent customer reviews
  • Money back guarantee

What Makes Instant Knockout Such a Good Fat Burner?

Instant Knockout is a quality product. It has to be. The FDA and other bodies that inspect GMP certified facilities would not accept anything less.

However, this alone is not enough to guarantee an effective product. The reason the product has succeeded in clocking-up such an impressive amount of good customer reviews lies elsewhere.

It’s because the formulation contains a strong blend of ingredients included in effective doses.

Instant Knockout Benefits

  • Cutting edge formulation
  • Suppresses hunger
  • Provides powerful fat burning ingredients
  • Erases fat from your most stubborn areas
  • Gives you sustainable energy throughout the day
  • Helps you to burn your fat like the professionals

Instant Knockout fat burning supplement

So, What Does All This Mean?

The power of the Instant Knockout formulation actually boils down to three things.

It suppresses hunger, boosts fat burning ability in two ways, and increases energy levels.

Let’s take a look at this in more detail.

1. Hunger Suppression

For some reason, Roar Ambition plays down the formulation’s hunger suppressing ability. The marketing material mentions it, but there is no real focus on this ability.

Whether you are a professional fighter, an amateur bodybuilder, or a stay-at-home mom, successful fat burning requires calorie control. If you eat too much and get more calories than you burn off, you will gain weight.

Many people find it very hard to control their appetites and their attempts at fat burning fail accordingly.

Likewise, a lot of people succumb to carb-cravings that scupper their fat burning attempts.

Unlike normal hunger cravings that occur due to the body perceiving a need for food, carb cravings occur after eating.

When you’ve just eaten a meal your blood glucose can rise at a rapid rate. It spikes. Your pancreas gland responds to this by pumping out extra insulin. This brings your blood glucose back down.

Unfortunately, it often drops lower than it was before eating your meal. Your body reacts to this by hitting you with cravings for carbs and other high-calorie foods.

The fact that the Instant Knockout formulation contains ingredients that suppress hunger and prevent cravings gives it extra value. Roar Ambition should be “roaring” this from the rooftops but they are not.

2. Fat Burning

Fat burning is what Instant Knockout is all about. Your body burns fat when it perceives an energy shortage. If you are burning more calories than your food provides such a shortage will occur.

However, fat burners provide ingredients that speed up the metabolism, cause thermogenic fat burning, or do both these things. Instant Knockout does both.

When the metabolic rate increases the body burns calories faster than usual. Not surprisingly, this increases the likelihood of the calorie shortage that forces the need for fat burning.

Thermogenic fat burners work by causing a slight rise in body temperature. The extra heat that radiates into the atmosphere is energy being lost from the body.

3. Extra Energy

Bearing in mind the fact the formulation was originally for professional fighters, it’s not surprising that it boosts energy. If you want to swing a good punch you need to have the energy to do it.

Fighters also have to train hard and do so on a regular basis. This requires energy too. It also requires a lot of dedication and mental focus. The same can be said for bodybuilding and most other sports.

Let’s face it though, most of us have times when we could do with some extra energy.

The need can increase while dieting. Diet-related fatigue is one of the things that make the process of losing weight such hard work.

So, although Instant Knockout is a product that’s good for fighters, it’s equally good for other people too.

Instant Knockout Ingredients at a Glance

The recommended dose of four capsules per day provides:

  • Glucomannan (1800mg)
  • Green Tea Extract (500mg)
  • Caffeine Anhydrous (300mg)
  • Green Coffee Extract (100mg)
  • Cayenne Powder (100mg)
  • Zinc (10mg)
  • Vitamin B6 (5mg)
  • Vitamin B12 (10mcg)
  • Chromium Picolinate (100mcg)
  • Piperine (10mg)

IKO Formula

It’s nice to see Roar Ambition is not using any proprietary blends and hasn’t tried to cram in too many ingredients. It’s a good formulation and all the inclusion rates are there.


Glucomannan is a water-soluble fiber taken from the roots of the konjac plant. It’s one of the best natural appetite suppressants in the world.

The ingredient works by absorbing the water it’s consumed with and expanding in the stomach to form an indigestible gel.

Glucomannan is so absorbent it soaks up around 50 times its own weight in water. Hence, once activated by water, it can produce a considerable volume of gel.

Additionally, clinical trials show glucomannan also lowers cholesterol. [SOURCE]

Green Tea Extract

Green tea is a popular fat burning ingredient that works in two ways.

First of all, the catechin antioxidants it provides increase the metabolism, causing the body to burn extra calories.

Secondly, green tea catechins are thermogenic fat burners that cause the body to dispense extra calories into the air as heat.

Not only do numerous studies prove the ingredient works, it’s also been shown to be capable of doing so for up to 24 hours. [SOURCE]

Caffeine Anhydrous

Caffeine anhydrous is one of the faster-working caffeine-providing ingredients.

People often make the mistake of thinking caffeine is only added to supplements because it’s good for providing energy. It does have this ability, of course, but caffeine also fights fatigue and improves mental focus.

However, although both the aforementioned abilities alone give it value in a formulation such as this, it does more.

Caffeine is also a metabolism booster and thermogenic fat burner. [SOURCE]

Green Coffee Extract

Green coffee bean provides the fat burning chemical chlorogenic acid. Normal coffee beans, not so much so because the roasting process destroys it.

The ingredient became popular after a recommendation from the American TV weight-loss guru Dr. Oz.

However, chlorogenic acid also offers a second benefit that makes green coffee extract a doubly interesting ingredient. It helps prevent the fluctuations in blood glucose and insulin that trigger carb cravings and desires for sweet food. [SOURCE]

Cayenne Powder

Cayenne Chili peppers are red peppers from the capsicum annum family. As with other members of the family, cayenne is a source of capsaicin.

Capsaicin is a proven fat fighting ingredient that increases calorie expenditure by revving up the metabolism. It’s also a thermogenic fat burner, but that’s not all.

Although the ingredient gets the most attention for its fat burning capabilities, research shows it suppresses the appetite as well. [SOURCE 1, SOURCE 2]


Zinc is a mineral that offers numerous health benefits. For instance, it’s a good for the memory and it improves wound healing as well.

However, it probably offers the most value here because it’s a proven testosterone booster.

Testosterone is an important anabolic hormone that encourages muscle growth. It also boosts energy levels and supports the fat burning process. [SOURCE]

Vitamin B6

Vitamin B6 helps the body make the most of the energy provided by food. If you doubt its credentials as an energy provider, go pick up a can of Red Bull. Look at the ingredients and you’ll see Vitamin B6 is listed there.

Apart from providing energy, Vitamin B6 also aids thyroid gland function. This is interesting because the thyroid produces hormones that are needed for an efficient metabolism.

You may also be interested to learn Vitamin B6 can prevent muscle weakness. [SOURCE]

Vitamin B12

Vitamin B12 has similar energy-boosting capabilities to those of Vitamin B6 and shares can space with it in Red Bull. In fact, you’ll find both in just about any brand of energy drink you buy.

The other good thing about Vitamin B12 is it supports red blood cell production.

Red blood cells have the responsibility of carrying oxygen around the body. Your muscles need oxygen to function correctly. Especially during exercise.

Boosting oxygen delivery to the muscles and major organs can increase stamina and endurance as well. [SOURCE]

Chromium Picolinate

Like chlorogenic acid, chromium has the ability to regulate insulin and blood glucose levels.

It’s generally accepted that chromium picolinate is superior to alternative chromium-providing ingredients, so it’s good to see Roar Nutrition is using this form. [SOURCE]

Piperine (10mg)

Piperine is an alkaloid that comes from black pepper. It’s a very common supplement addition.

However, piperine could be better seen as a helper ingredient rather than one that serves an active role.

The value of piperine stems from its ability to boost the absorption of other ingredients. [SOURCE]

Usage Guidelines and Recommendations

The correct dose is one capsule, taken four times per day. This dose should not be exceeded and each dose will need to be taken with sufficient water.

Roar Ambition says it’s best to take one capsule first thing in the morning and another before lunch. The third capsule is required during the afternoon and the final one is taken before dinner.

The recommended dosing schedule is:

  • 8 am — 1 x capsule
  • 11 am — 1x capsule
  • 2 pm — 1 x capsule
  • 5 pm — 1 x capsule

A lot of supplements are taken three times per day. If you are used to these kinds of supplements you may be wondering why Instant Knockout needs an extra dose.

There is a reason and it’s a good one.

When you swallow a supplement or medication, the ingredients are digested and enter the blood.

The levels in the blood gradually rise, peak, and then diminish. Roar Ambition chose to provide four doses instead of three to enable the levels to remain consistently high.

Please be aware, the formulation is not intended for women who are pregnant or nursing a child.

If you have existing health problems it’s wise to get medical advice before adding Instant Knockout to your daily routine.

The same goes if you are planning on using the product alongside other supplements or medications.

Instant Knockout Customer Reviews

A lot of men and women from all walks of life are heaping praise on the product.

A few average customer reviews read:

“Eat a low calorie diet, workout four times per week and take IK four times per day. That’s my recipe for success and it works like a charm. My chest is out, the pythons are pumping up nicely, and my abs have never been so lean and defined.”

Instant Knockout Customer Reviews

“Instant K is doing wonders for my energy levels. I feel like superwoman these days. I can train harder and no longer feel so tired. My waist is smaller and my tush is looking really sexy and pert. As for side effects, there has been none at all. Other than getting a lot of extra attention from guys, that is ;)”

Instant Knockout Before after photos

“Yeah, it’s good stuff. Does what it says on the tin. Helps me to work up a good sweat in the gym and helps me keep my workouts going. Im burning fat and looking lean and mean.”

Instant Knockout for women real results

“I’ve been using this for two months now. My boyfriend is on it too. It’s got us both looking great. Good for energy too. Just the thing if you want to push yourself harder but normally run out of steam.”

Celebrity Endorsements

A number of professional athletes use Instant Knockout and give it their recommendation. Greg Jackson is one of them.

Jackson is one of the top MMA coaches in the world and he recommends the product to all his trainees.

Diego Sanchez uses Instant Knockout too. If you don’t know the name, Sanchez was the Middleweight Champion of The Ultimate Fighter TV series (Season 1).

He initially used it to drop 45lbs and hit his target in just a few months. Sanchez continues to use Instant Knockout to maintain his lean physique.

Alexia Clark is also a fan of the product. If you don’t recognize the name, you may be familiar with her curves. Clark is one of the hottest fitness models on Instagram. With more than 1.5 million followers, she’s also one of the most popular.

On top of this, Clark is also a certified personal trainer and nutrition specialist. She knows her stuff, so her belief in the product says a lot.

Potential Side Effects and Interaction Issues

No side effects or interaction issues have been reported. However, the Instant Knockout fat burning formulation does contain a small amount of caffeine.

So, if you are unusually sensitive to caffeine or other stimulants, this may not be a good option. But if you can handle a cup of coffee, you and Instant Knockout should get along just fine.

Unlike a lot of other fat burners, Instant Knockout is not a stimulant-driven product.

Each one-capsule dose only provides 75mg of caffeine anhydrous. The green tea and green coffee bean will add a smidge more.

To make a quick comparison, each capsule provides a similar amount of caffeine to that in a small Starbucks cappuccino. A Starbucks venti cappuccino provides 150mg of caffeine. That’s twice as much as an Instant Knockout capsule. [SOURCE]

A 75mg dose of caffeine is unlikely to make the average person jittery or have anyone bouncing off the walls.

However, Roar Ambition advises against using Instant Knockout alongside other sources of caffeine or stimulants. So, if you are an energy drink fanatic, you may want to bear this in mind.

Money Back Guarantee

Roar Ambition provides a 90-day money back guarantee. That’s very generous. Most of the top weight management products come with a 60-day guarantee. It’s becoming more and more the industry norm.

However, although all the leading diet pill manufacturers offer a money back guarantee, the manufacturers operating at the other end of the scale often offer no guarantees at all.

Instant Knockout Summary

Instant Knockout is more than just an intense fat burner for professional boxers and MMA fighters. Though, it’s a perfect option if that’s what you do.

It’s an equally good option for anyone else though. If you have some fat you need to burn, the formulation is strong enough to do it. No matter what your sex.

The formulation also contains ingredients to help you “fight” hunger urges and see your fat-loss battle through to the end.

It also provides extra energy and although the formulation contains caffeine to help, this is not a stimulant-driven supplement.

The two B vitamins increase energy in a natural way. And let’s not forget the formulation contains some zinc to boost testosterone levels. Ultimately, this will help increase energy too.

It’s hard to fault this product. It contains ingredients that will get the job done and it’s reasonably priced. It also comes with an extremely good money back guarantee.

Ask us if you should buy this fat burner and we’d have to say go ahead, knock yourself out.

Instant Knockout fat burning supplement

Where to Buy Instant Knockout

If you want to buy Instant Knockout you will need to do so via the official website. Roar Ambition doesn’t market the product via Amazon, eBay, or any third-party online stores.

So if it does appear to be available elsewhere, it’s a case of buyer beware. The product will probably be fake, will not work, and could have the potential to make you ill.

Restricting all sales to the official site is one of the ways Roar Ambition keeps the price so low. It’s not unusual. Most of the top supplement manufacturers adopt a similar stance.

Instant Knockout Buying Info

  • The official Instant Knockout website offers multiple currency options and orders are generally dispatched within 24 hours.
  • Each bottle provides a 30-day supply of capsules the site often offers customers some wicked deals.
  • At the time of this review, it was possible to get four bottles for the price of three. Roar Ambition calls this their Ultimate Shredding Stack and it comes with free worldwide shipping.

Click here to visit official Instant Knockout website

About Ross T 31 Articles
Ross is well versed on all things connected to the supplement industry. He is a former martial artist and iron man. He is now turning his attention to physical conditioning.

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