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Instant Knockout Fat Burner

By on February 22, 2018 in Weight Loss with 307 Comments

Instant Knockout Review

Buy Instant Knockout



Manufacturer: Roar Ambition, Ltd.

OK, let me be blunt.

Over the years I’ve had the opportunity to sample, review, try-out, experiment-with, and put to the test many different types of supplements – and quite frankly, when it comes to weight loss products, the majority are (cover your ears, kids) complete bullshit.

This is the main reason I don’t recommend a lot of fat burners in general: so many brands I’ve had experience with over-promise and under-deliver – if they even deliver at all.

Instant Knockout ( is a relatively new fat burner to the market, and as usual, when I first heard about it my spider-sense started jumping like a yo-yo.

“Here we go again,” I thought (although I had to admit that the bottle looked pretty cool).

If not for the fact that it’s made by Roar Ambition, Ltd. (makers of TestoFuel), I wouldn’t have given it a second thought.

But considering the great track record that the other two products have, I must confess that I was curious about trying it out.

So, What is Instant Knockout?

According to the manufacturer, Instant Knockout was originally developed for pro boxers and MMA fighters.

In case you’re not familiar, after a fight is scheduled it’s extremely important that the fighters lose enough excess weight – without compromising muscle and strength gains – to qualify at the official weigh-in.

These guys require a fast and effective way to drop the pounds, and using everyday methods just won’t cut it.


This product is apparently able to achieve this type of rapid result is due to a three-pronged approach: boosting the metabolism, improving endurance, and eliminating fat.

By combining a unique formula with carefully timed dosages throughout the day, your body should remain in a constant fat-burning state, while at the same time maintaining muscle and definition.

What’s in it?

There are 10 active ingredients in Instant Knockout, both  thermogenic and non-thermogenic, that are specifically combined to produce a synergistic effect together to turn off the body’s fat-storing switch.

Here’s a look at each one and how they interact with one another:

Green Tea: I’ve been a big fan of green tea’s benefits for a while now.

Don’t be fooled, though – this natural ingredient may sound tame, but it contains the compound polyphenols which help pack a major punch when it comes to burning fat.

These polyphenols elevate norepinephrine levels to boost metabolism, cause the muscles and liver to increase fatty acid consumption, and reduces triglyceride levels which reduce overall fat in the body.

Cayenne Pepper: As I’ve discussed before, this hot pepper isn’t just something to spice up your meals any more,

it contains a component called capsaicin which increases calorie consumption, reduces fat stores, and has been shown to reduce the hunger hormone ghrelin.

Glucomannan: This naturally occurring yet powerful dietary fiber swells up in the stomach, making you feel fuller faster and preventing eating too frequently or too much.

Based on the information I’ve read the effects are legit, and with the combined appetite-suppressing abilities of the cayenne, it’s made even more effective.

Caffeine Anhydrous: Who doesn’t know about caffeine – I mean, really?

The thing about caffeine that makes it so popular in diet and workout supplements is that it’s been proven to boost metabolism and to quickly use up fat stores for energy, burning up to 30% more fat, in fact, if consumed before exercise.

It also stabilizes blood sugar levels for longer, which is another great way to control appetite.

And since it’s in an anhydrous form, you’re getting caffeine in it’s most potent state.

Not having any impurities attached eliminates many of the unpleasant side effects associated with other forms of caffeine consumption, like drinking too much coffee, for example.

There is also a synergistic action between caffeine and the catechins in green tea, which can boost the body’s use of calories as energy.

Piperine: The capsaicin found in cayenne isn’t the only fat-burning compound found in peppers.

This interesting ingredient (extracted from black pepper) has been shown to actually block the formation of new fat cells as well as improve the absorption of many nutrients, which technically makes the ingredients in Instant Knockout that much more potent.

Green Coffee Bean: Due to it’s increasing popularity, you’ve probably heard about green coffee bean extract.

Numerous studies have shown that the chlorogenic acid contained in raw coffee beans reduces glucose production in the liver, prevents the fat absorption rate when digesting food, reduces body fat percentage, maintains healthy blood sugar levels and lowers cholesterol – all of which contribute to having a healthy, lean physique.

Vitamin B6 and B12: While the benefits of taking these B-vitamins are great for the health in too many ways to mention, I’m not sure that including them in the formula does much here.

If you’re already taking a good multi-vitamin (which you should be), then the extra amounts you’ll be getting here aren’t going to improve on that much, although it certainly can’t hurt to take extra.

GTF Chromium: As far as this ingredient goes, I know that it’s good for stabilizing blood sugar levels, which in turn is helpful for fat loss.

It’s also purported to increase growth hormone in the body, but the jury’s still out on that one.

Zinc: Zinc is one mineral that all guys should get plenty of, it’s necessary for maintaining optimal testosterone levels and the efficient processing of nutrients.

As a matter of fact, research has shown that people that are overweight also have low zinc levels.

And the from the label:

Side Effects

First of all, the ingredients used in Instant Knockout (as with all Roar Ambition products) are top-notch, being made and regulated in both US and UK facilities.

This product is definitely safe to take on a regular basis – however, even though it primarily functions by targeting appetite suppression and fat storage, it does contain natural stimulants.

Keeping this in mind, you should definitely time it so that your last dose for the day is 4-5 hours before bed time.

As a matter of fact, even though IKO contains less stimulants than a lot of other products, taking four capsules a day may be a little strong for those who aren’t coffee drinkers or are otherwise sensitive to caffeine.

If that’s the case for you, you could try starting with just three a day initially.

This will not only prevent any kind of “speedy” side-effects, but it’ll also save money by stretching out the number of doses for each bottle.

After you’ve accustomed yourself to that dosage, try going to the recommended four a day.

And while we’re on the subject, other than using common sense when taking Instant Knockout with other products that contains stimulants, I see no reason why there should be any issues with using other supplements.

And if you’re concerned about taking a drug test while using this supplement, don’t be – it doesn’t contain any banned or synthetic substances, and won’t trigger any false positives.

Manufacturer Video


How do you take it?

Each bottle of Instant Knockout contains 120 capsules at 500 mg each, designed to be taken four times daily – one capsule in the morning, one at lunchtime, one later in the afternoon, and one more before dinner.

The purpose here is to keep the body in a constant and steady state of boosted metabolic rate.

Once again, if you’re sensitive to caffeine, try skipping the last dose initially and just try taking only the morning, noon and afternoon capsules.

Where to Buy

Currently, Instant Knockout is only available directly through the manufacturer’s website.

It’s definitely a little on the expensive side, but once you try it you’ll realize what a quality product it actually is.

Besides, it’s better than wasting half that amount for something that doesn’t even work.

I do know that they have distribution centers located in the US and UK, but they’ll also ship to anywhere in the world, so international shipping is not a problem (they also ship to APO addresses for those in the military).

The orders get filled fast, too – barring weekends, they ship out either the same day you order or the next, with tracking.

The saving grace is the 90-day money-back guarantee – if you don’t see results in three months after trying Instant Knockout they’ll refund 100% of your payment.

Trust me, this is not something most weight-loss products have the balls to do – they’d go out of business in a hurry if they did.

Conclusion – Does it Really Work?

My verdict? I’m not sure if it’s due to the quality, purity or combination of ingredients (or all three), but I love how well this product works.

For me it produced noticeable results by boosting the metabolic rate, reducing hunger cravings and fueling energy levels in a way that’s hard to describe but easy to feel. It’s also a very “clean” fat-burner compared to others – kind of like the difference between having natural energy versus too much coffee.

One thing I’m getting asked about all the time is “how long until I see results?”

It’s really impossible to give a broad-brushed answer to that because everyone is different and there are so many variables involved.

One thing I can tell you is that if you think you’ll be able to sit on the couch watching TV while losing weight, you’re probably going to be disappointed.

But if you take IKO with even a moderate increase in physical activity you should see results within 2 or 3 weeks, in my experience.

And even though it was specifically designed to be used by bodybuilders and athletes,

I would say that any guy who’s looking to lose weight and reduce body fat would definitely benefit from this product, although I would encourage you to put the extra energy you’ll get to good use with some form of exercise!

You can find price and more info at the Instant Knockout website.

Overall Rating

Visit Instant Knockout Website

Have you tried Instant Knockout? I’d love to hear about your own personal experiences. Feel free to email me or leave a review or comment below.

About the Author

About the Author: Mark McIntyre is the founder of and acts as it's chief contributor. He is a fitness trainer and avid mountain biker who also enjoys camping, hiking and fishing. Besides managing Male Health Review, Mark is also a guest columnist for several blogs related to men's health. More about this author...

There Are 307 Brilliant Comments

  1. harley says:

    This product did not work for me at all. I have gained 30 pounds in the 90 days that they recommended to take in order for a refund, because of their guarantee. I have lost all energy and drive that I used to have to accomplish task at hand. I would strongly recommend that if you want to lose weight look elsewhere and run as fast as you can from Instant Knockout, unless you want to take a nap.

  2. Samuel says:

    Hiii mark i do have a too much of fat on my chest which is also known as man boobs will it burn the fats on my chest?

  3. Jamie says:

    Hi Mark … I am a 42 old male… I’ve been running since high school, and currently competitive mostly 5k-8k. I am using the summer months to train, but also mix it up with biking and swimming, and strength training. As much as I workout looking for something or someway to burn that stubborn abdominal fat, but maintain lean muscle mass, but not bulking up too much as it’s not good for distance running. Is Instant Knock out a good choice or do you have other suggestions?

  4. Hi my name is Gucci black and I’m 323 pounds will these actually help me lose weight fast I have a lot of belly fat and leg fat I’m on 5″6 I look like I’m 400 pounds please tell me best ways to lose weight and not just ways to get my weight I really want to pose to my girlfriend in like 4 months but don’t want to be a big ass slob

    • How much exercise are you getting? IKO will definitely help, but in order to lose substantial weight you’re going to have to get moving if you’re not already. If you’re not active then your metabolism is probably super sluggish, and while I’d like to say that IKO (or any product) will help you lose that amount of weight all by itself, it’s not likely. But if you combine it with some daily aerobics (running, cycling, treadmill), or at the very least walking, I think you’ll be very surprised at your results in four months’ time.

    • robin khaira says:

      hi Darrell
      what mark said is completely right, i am not a dietitian but i know a thing or 2 about losing weight and getting in shape, i had put on too much weight, before i started working on it, and i am in great shape right now and i have also helped many other people lose weight at gym and some of my friends too.
      what i always say is that “you lose your weight in kitchen and you only shape your body at gym”. you will have to work on your diet as priority and exercise is only to fill in the gaps. yes fat burner will help you, but not on its own, you will have to go on a strict diet and exercise only then fat burner will help you. if you only take it on its own and still have the same food and lifestyle, then it wont help.
      admitting that you are over weight is the first hurdle, most people keep denying and pretend they don’t have excess weight. but you have already pass that, you all you need is a strong will to eat healthy,
      so strict diet, some exercise and a combination of fatburner should get things going for you. good luck

  5. jassim says:

    As am from qatar can u suggest a fat burner with the same effects as iko and also which can be shipped to qatar.

  6. pratham says:

    caffeine intake is too high 300 mg also not to forget green coffee 100 mg and if any one taking pre workout suppl will be already taking 150 to 200 mg caffeine in it. its not safe. also dehydration will be worst u ill have to drink like 15 glass of water or may be more than that..

  7. Pankaj says:

    Hi mark
    I am Pankaj from India can I take instant knock out… I want to reduce my belly fat …I do 4 k.m running daily and 1 hour workout in gym …any authentic website to buy iko plz suggest

  8. MABS says:

    Hi Mark
    I will be fasting 30 days from 6th of June to 6th of july. We will be fasting for 19th ours without eating or drinking . Will it be suitable to take them tablets maybe 2 tablets a night?

  9. huan says:

    Dear Mark,
    I would like to thank you for your very informative article regarding Instant Knockout. I ‘m currently training in MMA and Kick Boxing, minimum five times a week. 5,5 80 kilos and 25% body fat ( i’m the kind of guy gaining most of body fat at my thighs and legs and then belly, which makes it difficult to lose ) . I need to lose body fat and i was thinking about this product. At the moment i use met rx active man multivitamin,two tablets a day and whey protein. Do you think there will be any issue if i use Instant Knockout as well with these? I presume there would’n be any issue, but you are an expert so i would like your opinion first before making any action!
    Thank you in advance!

  10. Adriana says:

    Hi, I do have problems in swallowing pills. Instead of swallow it… Can I open the Instant Knockout capsules and dissolve the power content with the water and drink it??
    Also can I take less Instant Knockout but also with Grenade Killa Ketones?? Thx

    • To the best of my knowledge the IKO capsules aren’t time released, so mixing the contents with water shouldn’t pose a problem – although the taste may be more unpleasant than trying to swallow a pill. The Killa Ketones should pair well with IKO, even at the full dosage, as long as the extra caffeine isn’t too much for you.

  11. Trevor says:

    Can this supplement be used with whey protein after workouts and also possibly a preworkout ?

    • Post workout with protein is absolutely OK, preworkout too, but I wouldn’t really recommend both – it’s meant to be taken with a more even distribution throughout the day.

      • Florin says:

        Hi Mark i just bought the IKO and some one said I can take 2 in the morning and 2 in the that safe to do so?thank you

        • Yes, you can take your doses that way if you want, it’s perfectly safe to do so.

          • Ben says:

            If I take 2x doses of 2 pills will it still be affactive as the recommend serving of 1pill 4 doses?

          • It’s a good question. The pills are technically designed to be spread out evenly over the day, but you might experiment with two larger doses instead – it could end up working just as well or better for you.

      • Alex says:

        Hi Mark, I couldn’t see how to post my own message to you so had to just comment. I’m an 18 year old male and have just ordered a 1 month supply of capsules of Instant Knock Out. I currently weigh about 75-80kg but feel I have too much fat around chest and abdominals. With 2 gym sessions a week, how much progress should I expect to see in the month after I start taking the pills? Looking for more lean definition and less man boobs etc. Thanks!

        • In a month’s time you should definitely notice more definition and a reduction in those stubborn fat zones, especially if you incorporate some cardio into your routine.

  12. Dominic says:

    Hi, due to a health issue, I need to make a weight cut of 40 pounds in 2 to 3 month maximum … Do you think it can help to reach my goal. I’m actually going to the gym 5 time a week to get my goal

  13. anthie says:

    Hi Mark, is this suitable for women too?

  14. Tvai says:

    Can I take Advil/Tylenol (for headache/fever) while taking Instant Knockout? Also, I drink 2 tablespoons of Apple Cider Vinegar with 1 cup of water. Can I still drink apple cider vinegar and take Instant Knockout? Is it safe to do so?

    • As far as I know there shouldn’t be any conflict between ibuprofen and the ingredients in IKO, and certainly no problems with apple cider vinegar. ACV would probably only help your results.

  15. Tyler curran says:

    Would Instant Knockout be safe to stack with NitroCut?

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