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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. Ivan says:

    Hey Mark I am looking to reduce my weight. My current is 223 pounds and want to be in 180, is it posible with this product? I want to loose that weight in 2 and half months but my physical activity is very low so please help me with a diet and with this product. I am 21 years old and 5′ 10″

    • Yes, it’s possible, but since you have a specific deadline in mind you’ll definitely need to stick to a healthy meal plan, and if possible incorporate some form of physical activity into your daily routine. For most people who are relatively inactive, these two things alone can work wonders by simply waking up an otherwise sluggish metabolism. When combined with IKO, it basically becomes a downhill battle.

      For diet, I recommend doing something like paleo; but if nothing else, cut out all processed foods, flour, and sugar. Try to eat fresh foods as much as possible, also.

      Give these steps a try for just a week or two and you should already start seeing encouraging results.

  2. Shubham tushir says:

    Hey this Shubham from India weight is 190 pounds ..I started gym before 1 months plzz tell me how many capsule take in whole day..I mean how to take and wats the dose for me …

  3. Jeff says:

    Hey mark I am 18 years old I weigh 280 pounds I am a high school wrestler I am wrestling the 220 division I start wrestling in 2 and a half months I need to get to 200 within that amount of time will this supplement get me there with heathy eating and exercise

    • It will surely help, but 80 lbs. is a lot of weight to lose in that period of time. It might be possible though, especially given your age, but it won’t be easy, and it’s not a particularly healthy rate of weight loss.

  4. Roxanne says:

    Hey Mark, I currently workout daily (40 min weight resistence, 30 minutes cardio). I eat clean, organic whole foods. I use the 80/20 rule, weekends are the indulgent times. I’ve hit a weight loss plateau and haven’t found a way to drop the last 10 lbs I want to lose. I’m 5ft, 119lbs. Would this help me break through my plateau issue? Thanks!

    • It should definitely help give you the boost you need to help lose those last few pounds. I also recommend switching to HIIT exercise when hitting a weight loss plateau, because it can really wake up the metabolism, plus it’ll cut your workout time in half or more.

  5. Miki Puerto says:

    My INSTANT KNOCKOUT experience
    After 3 months with 4 pills/day, fitness training, diet 1800Kcal.
    NO Instant
    NO Knockout
    Absolutely FAKE
    If you have good eating habits and light/medium workout routine, YOU DON’T NEED this product.

    Too expensive and too innefficient.
    If you need a real, cheaper and effective fat burner, try Hydroxycut Elite or similar, really cheaper and trully fat burner.

  6. Sara says:

    Hi Mark, I’m 25 female and been chubby ever since
    I really want to lose weight and reach the perfect weight, I would say my goal is to lose 15 lbs
    I’m trying to find the best way to that as I do want to work out aswell to get better results, do you recommend this specific fat burner for me?
    And do u recommend taking a protein bar after the work out? For better results I mean

    Thank you very much for your time

    • If you combine IKO with working out, I see no reason why you shouldn’t reach your goal of losing 15 lbs. It’s a good idea to consume both protein and carbohydrates around the time of your workout, either before or after, or both. Otherwise, try to cut back on the carbs in general, especially simple carbs like sugar and flour.

  7. Kristi C says:

    How much caffeine are you ingesting daily with this product? It’s got 400mg caffeine anhydrous, i.e. pure caffeine, plus the naturally occurring caffeine in the green tea and other ingredients… I don’t have a caffeine sensitivity but I also don’t want to be ingesting 6x the daily recommended dose of it for 3-4 months either…

    • It’s only a total of 300 mg caffeine anhydrous, which is about three cups of coffee, and well within safe limits for healthy adults. You would have to ingest about twice that on a regular basis before potentially entering unhealthy territory. They actually reduced the amount of caffeine from the previous formula.

      • Kristi says:

        Ahh, okay. They’ve got 300mg/serving, with one serving being 4 capsules… I misread it, thought it said 300mg/capsule, in which case I would have expected my heart to jump out of my chest almost immediately. Thanks very much!

  8. Lobsang says:

    I want to lose my fats from my belly. My upper body is fine. It’s on shape but want to lose my fats belly. I used to have six packs but since I stop working out. I drink beer most of everyday but now I quit it 2weeks ago. So is this pills going to burn only my fats belly. Any suggestions?

    • Since the extra beer calories was probably one of the main reasons for the belly fat, cutting out both the extra calories and using Instant Knockout should definitely get you the results you’re looking for. You might also try to get in some form of exercise, if possible. It will make everything that much easier.

  9. Nikolai says:

    Hello I got a question, my name is Nikolai from Russia I want to know if I can take trato fuel and iko at the same time?

  10. John L. says:

    hello Mark,
    I see that IKO is great to stack with Nitrocut. Just wondering how would you take both throughout the day? can I take both 1 capsule of IKO and Nitrocut first thing in morning and another IKO and Nitrocut preworkout?


  11. Ranveer Singh says:

    hello marc i am from India and my weight is 66 or 67 but contain a quantity of fat on my body i want to clean up and want lean my body so please help me……thank u so much.

  12. Zee says:

    Hey. I have just started taking IKO as per the recommended dosage. What I’ve noticed that the pills show up in the toilet. Is this a normal occurring or are the pills supposed to dissolve completely.?

  13. Miguel Perez says:

    Hey mark, I just purchased your product and been taking it for 2 days and have not felt anything when taking it. It’s obviously too early to see the weight loss happen but when I read the other reviews people mentioned as well as in your video that you
    Feel the energy or the supplement working. And to be honest I don’t.
    Your feed back would be appreciated. Thanks

    • It’s probably because the newer formula contains less stimulants than before. The newer version focuses more on non-stimulating fat-burning ingredients and appetite control, so while it does help increase the metabolism there won’t be as much of a high-energy sensation compared to the older formula.

  14. Michael hernandez says:

    Hey mark I’m from Puerto Rico and I would like to know how many pounds I’ll lose if I take it and play basketball five times a week

    • Michael hernandez says:

      I am 220 at the moment

      • If you’ve just started playing that much basketball on a weekly basis, taking a weight loss supplement shouldn’t be a top priority (at least not initially). IKO will help speed things up, but you might wait until you reach a weight loss plateau and the pounds aren’t coming off as fast. Exactly how much it will help you lose is impossible to say though, there’s just too many factors involved from person to person, but you’ll probably return to the same fat-loss rate you initially experienced.

  15. Keith says:

    Hi, I’m curious, is it safe to take this while I’m taking high blood pressure medication? I have a mild blood pressure usually in 135/80. I workout 4-5 times a week, on a diet plan, and need to lose weight in the stubborn areas. Thanks for the response in advanced!

    • It’s possible there might be some conflict, depending on the medication. If I were you, I’d definitely run the list of ingredients by my doctor first for approval.

      • Gareth says:

        Sorry to reply to someone else’s comment but can’t see how to post.
        I currently take asprin and atorvastatin and omeperazole as I had a blocked coronary artery a few years back. They put 2 stents in to open it up and I now have to take the above.
        I regularly work out cardio now and eat a healthyish diet. Do these increase the heart rate or put any stress on the heart or do you think I would be safe to try a months course of these.

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