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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. Ana says:

    Comment: I saw your post of Instant Knockout fat burner. I´m female, 24 years old, 5´3″ 119Lb and 18.5% body fat. I have never take any fat burners, and I want to by one bottle of instant knockout but i dont know if I´ll see results in only one month. And for me is quite expensive, I hope you can help me. Thank you

    • Hi, I can certainly appreciate your concern. On one hand, one month may not be enough to experience the full benefit of a supplement, but on the other hand, a month should be plenty of time to see at least some results. The problem is, everyone’s physiology is different, so it might quickly work like a charm for you, or it may take longer.

      I think you’ll do just fine with IKO, but given that you’re not experienced with taking fat burners, and expense might be an issue, you could also consider starting with a different product (such as Sheer Thermo or Skinny Gal, or similar). They’re less expensive but still have an effective ingredient profile, and they’ll offer you more flexibility with experimentation.

  2. dan says:

    I have ordered IKO. Can you confirm if it’s ok to stack with creatine, bcaa caps and N.O explode? I was also thinking of ordering some grenade at4 caps. Please advise

  3. Seba says:

    Se puede tomar inko con arginina?

  4. JC says:

    I do intermittent fasting. Will this break a fast?

  5. Oreliz says:

    Hello I will like to know if it’s safe to have IKO with Adipex pills.

  6. Chris says:

    Hey there
    Can i take IKO and gynectrol? there is caffeine in both products, and i dont know if that would be to much caffeine? Or can gynectrol be substituted for testo fuel?

    • Both IKO and Gynectrol have moderate amounts of caffeine (last I checked, IKO is 300 mg and Gynectrol is 200mg). Taking both would still be below what’s considered unsafe levels – however, it would also be about the equivalent of five cups of coffee per day. For some people that’s not a big deal, while it might make others want to climb the walls. Bottom line, it would come down to your individual tolerance.

      And Testo fuel is a good supplement, but it’s not really a substitute for Gynectrol since it’s not aimed specifically at gynecomatia.

      Hope this helps.

      • Chris says:

        Thanks for your reply, really apprecieate it!
        Do you have any comments to gynectrol? i have only found very few reviews on it, and they have not been very consistent.

        Best Regards

        • It’s a good product, with solid ingredients, and I know of guys who’ve gotten great results… but I also know of some who didn’t see much change. Unfortunately, it goes with the territory since there are a lot of factors that come into play when targeting man boobs. But if your chest is a problem area I’d say definitely give it a try, you will probably see at least some improvement.

          Btw, I just noticed that Gynectrol has upped their caffeine content to 400 mg, so keep that in mind.

  7. Aaron says:

    Hi Mark,
    I am now on week 3 and don’t see a change on the scale. I workout 3 days a week with heavy lifting followed by cardio and do Crossfit 2-3 days a week as well on my non-gym days. I have read a few people saying combing the pills either all at once or two twice a day works but then doesn’t that counter the effect? I also eat very clean, count my macros and such so am baffled why I am not seeing results. I emailed customer service to find out an average of when people see results – based on comments here it looks like as early as 1 week. Any idea on how long someone should start seeing results? Thanks!

    • Spreading out the doses evenly (for whatever reason) may not be as effective for some people, so feel free to mix it up. For example, you can try doubling up twice a day, say before and/or after your workout. Sooner or later you’ll find your sweet spot.

  8. Aw says:

    Hi. in your opinion what si the best of the best of the best fat burner on the market right now in 2018???

  9. Amanveer Singh says:

    Where can i buy it in India… New Delhi

  10. Maran Maniam says:

    Hi , I am Maran aged 43 from Malaysia(Malaysian Indian), will this work for aged men like me ?

  11. Jon says:

    Do I have to exercise every day while taking this? Or is three times a week ok? If so, do I only take it three times a week?

  12. Ron says:

    Are these fat burners ok to take with antidepressants?

  13. brett says:

    hi nearly finished my four months supply of instant knockout and very happy with results, wondering if anyone has had problems keeping off weight when finished course?

    cheers brett

  14. Ken says:

    Can both Testofuel and Nitrocut be taken with Instant Knockout?

  15. Vicky says:

    After reading your review i decided to give it a try and will be taking it with Muscle tech protein, and scoop of creatine. I do not have weight issues but have stub born fat especially in waist area which i couldnt get rid of with 4-5 day gym routiene. Can you recommend anything else for flat belly/abs.

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