Instant Knockout Review: Is It The Real Deal? [Updated 2021]


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Instant Knockout is such a well-crafted and interesting supplement name. But, what does it ‘knock out’ anyway? This supplement claims to be the secret for MMA fighters and pro boxers and is classified in the supplement world as a ‘fat burner’. Indeed, it has some backing from MMA fighters and coaches like Diego Sanchez and Greg Jackson.

But that’s not enough; our skepticism with supplements that claim to be the ‘magical pill’ needs more research and trials to be cleared. There are too many black sheep in the business that has made it difficult to choose the right products. And we are dedicated to helping you make the right choice.

So, does Instant Knockout actually ‘knock out’ anything? From our findings, it does knock out even the most stubborn body fat. Instant Knockout is a safe and efficient fat burner that was originally designed for boxers and other athletes. It works by naturally increasing your body’s metabolism, suppressing appetite, and thermogenically burning calories.

The ingredients used in the manufacturing of Instant Knockout are scientifically researched and proven to be 100% natural. The supplement has a great composition of glucomannan, a water-soluble fiber that aids in weight loss.

Instant Knockout Manufacturers

Instant Knockout is manufactured by Roar Ambition, a wellness and supplement company based in the UK. However, it’s important not to confuse it with another UK-based marketing and advertising company that goes by the same name.

Roar Ambition doesn’t merely design and sell supplements. They take pride in the constant follow-up and evaluation of their products. Every six months, they re-evaluate and, if necessary, improve and reformulate their existing products.

They claim to work with nutrition experts, scientists, and athletes to ensure that their products are made with the highest quality ingredients.

Roar Ambition is in the supplement business to help everyone, from the average gym-goer to the professional athlete, meet their nutritional needs.

Check out their website to find out more:

Instant Knockout: The Inspiration.

Instant Knockout was originally designed to be used by boxing and mixed martial art (MMA) athletes.

These athletes often need to drop weight fast to make a certain weight class.

To lose weight, you need to “cut.” That involves eating fewer calories and/or adding in extra workouts.

The problem with losing weight quickly is that it is difficult to cut calories without losing muscle and strength.

Cutting calories also compromises energy levels, making workouts increasingly difficult.

There’s also the dreaded grumpiness and irritability that comes with being hungry while in a calorie deficit.

Instant Knockout was strategically developed to address these common issues associated with losing weight:

  • muscle loss
  • loss of strength
  • low physical and mental energy
  • hunger pangs, and cravings.

The brains behind this supplement decided to take all of nature’s best fat loss ingredients and put them into one easy-to-swallow pill.

You can be confident that the ingredients used in Instant Knockout are:

  • high quality.
  • Completely natural.
  • All plant-based.
  • Contain only vitamins, minerals, and extracts that have been proven to speed up the body’s fat-burning process.
  • Safe to use in any athletic competition.
  • Produced in FDA certified facilities.

Let’s look at each of the primary ingredients one by one.

Instant Knockout Ingredients

Instant Knockout Ingredients

Green Tea Extract

Scientists have found that polyphenols extracted from green tea have fat-burning properties.

Most of this takes place thanks to thermogenesis, which is an increase in body temperature.

Green tea extracts also nudge the liver and muscles to consume more fatty acids.

This is exactly what you want; for your body to use up any extra calories floating around in your body rather than having them pushed off into storage.

The catechins in green tea also work together with caffeine to boost fat burning [1].

Cayenne Pepper

Cayenne peppers contain capsaicin, a natural chemical compound found primarily in spicy peppers. You can also find capsaicin in bell peppers but smaller amounts [11].

Capsaicin is said to aid in the release of fat from fat cells. And it is a metabolism booster known to encourage thermogenesis.

You can look at thermogenesis this way:

Thermogenesis means the production of heat in a body, usually referring to a human or animal body.

When the body turns up its thermostat, you know that chemical reactions at a cellular level are happening at a faster rate.

And that is exactly the definition of metabolism. Your body’s metabolism is the rate at which food is broken up into smaller pieces and then used as energy.

And we know that spicy foods such as cayenne pepper speeds up metabolism [2].


Glucomannan is a soluble dietary fiber that comes from the konjac plant [12].

The konjac grows underground like tubers such as beets and yams. In Asia, where you can find konjac plants growing, konjac is often referred to as a yam.

The konjac plant is approximately 40% glucomannan. Konjac is low in calories and high in fiber.

And when you’re in a calorie deficit and don’t enjoy feeling hungry, fiber is your friend. Fibre gives you a feeling of fullness.

Glucomannan helps to control your appetite. When mixed with water, Glucomannan can expand to absorb nearly 50 times its weight.

It’s also been shown to help reduce body fat and cholesterol levels without compromising muscle mass or bone density.

Glucomannan is also the only supplement in the UK that can call itself an appetite suppressant [3][4].

Caffeine Anhydrous

We know that caffeinated coffee helps wake us up, feel more alert, and gives us energy. So is caffeine anhydrous any different?

Caffeine anhydrous does all these things:

  • it boosts metabolism so you can burn up to 30% more fat;
  • it increases fat absorption;
  • it regulates sugar levels which makes it easier to handle food cravings;
  • it boosts your energy and naturally stimulates your nervous system.

It’s the anhydrous part that sets caffeine apart from your regular cup of Joe. Anhydrous means without water. This is both good news and bad news.

When it comes to anhydrous caffeine, we know that there are no additives or fillers that can interfere with the purpose of the caffeine.

There’s also less chance of side effects caused by potential impurities.

However, anhydrous caffeine can be dangerous. There is a risk of taking powdered caffeine because it’s easy to overdose, leading to lethal results.

For Instant Knockout, Roar Ambition carefully researched the optimum amount of caffeine anhydrous that is safe yet effective.

We strongly caution you to avoid taking anhydrous caffeine on your own.

However, you can confidently trust Instant Knockout to deliver the positive side effects of caffeine without any worry of overdose or negative side effects [5].

Vitamin B6 and Vitamin B12

You’ve probably heard that the B-group of vitamins is good for people under stress. So it makes sense that Roar Ambition has added these two B vitamins to Instant Knockout.

The truth is that exercise and eating in a calorie deficit are both stressors on our bodies.

If you think about it when you’re looking to lose weight and cut calories, it’s common to feel run down.

If you’re exercising too much, you often end up getting sick or injured.

You see how B Vitamins are important?

Vitamins B6 and B12 play important roles in protein metabolism: the breakdown of protein into smaller particles known as amino acids, then the use of these tiny protein molecules in the body.

Protein is essential for many things in the body, including muscle repair and growth.

Vitamin B12 is also essential for red blood cell manufacturing in your body. And it plays an important role in the functioning of your neurological system.

Vitamin B12 deficiency is fairly common and can be associated with:

  • anemia
  • fatigue
  • weakness
  • nerve damage
  • challenges with balance and mobility
  • inflamed tongue and mouth sores
  • dizziness and breathlessness
  • blurred vision
  • mood disorders such as depression

Vitamin B6 deficiency is much less common, but it has been linked to low levels of B12.

Along with protein metabolism, Vitamin B6 is also important for cognitive (brain and thought) development and healthy functioning of the immune system.

Our bodies also use Vitamin B6 for the metabolism of carbohydrate molecules, which are broken down into glycogen.

That means that with enough Vitamin B6 in our diets, our body will require fewer carbohydrates, which is great news when we’re in a calorie deficit [6][7].

GTF Chromium

GTF stands for glucose tolerant factor. Chromium has been shown to interact with the body’s blood sugar levels, positively affecting glucose tolerance.

This allows your body to regulate its metabolism of carbohydrates more effectively.

What does this mean for someone who is trying to lose fat? It can help your body keep energy levels stable while also controlling hunger and appetite.

Chromium is not an appetite-suppressant per se, but it does make the process of losing weight more manageable [8].


Zinc is an essential mineral our bodies require in only trace amounts. But without zinc, it becomes difficult to stay healthy.

Besides keeping your immune system strong, zinc also plays an important role in insulin sensitivity and metabolism.

When it comes to losing fat, it helps if your body can maintain relatively stable blood sugar levels.

High blood sugar levels will cause your body to release insulin, and insulin likes to store units of energy. Translated, that means insulin stores calories as fat.

Zinc also helps you lose weight:

  • by improving the hormone responsible for signaling fullness (leptin) so you naturally eat less.
  • by improving your muscular endurance and strength so your athletic performance won’t suffer.

Piperine (black pepper)

Did you know that black pepper comes from a plant?

Piper nigrum is a flowering vine that produces broad, green leaves and strands of tiny stone fruit.

These tiny fruits are harvested and dried, which are hereafter referred to as peppercorns.

Black pepper is used as a spice and seasoning. And as with most other spices, it has a thermogenic effect, causing the body to create heat which means an increase in the rate at which it processes calories at a cellular level (metabolism).

Piperine has also been shown to raise energy levels naturally. This is beneficial both in and out of the gym, especially when you’re in a calorie deficit.

Lastly, piperine has been used as a digestion aid. It can be used to treat constipation, diarrhea, and other digestive illnesses.

When it comes to fat loss, we rely on piperine to help in the absorption of nutrients.

It does this by supporting normal digestive enzyme secretions. And the more nutrients we absorb, the better we’ll feel, especially when spending time in a calorie deficit.

The bottom line with piperine is that it is a powerful ally when it comes to fat loss, especially when paired with highly nutritious food [9].

Green Coffee Bean

The benefits of the green coffee bean do not include caffeine, as you might assume. Rather, green coffee beans have a compound called chlorogenic acid (CGA) with the fat-burning properties we’re after.

Keep in mind that these green coffee beans are unroasted.

CGA reduces the absorption of glucose. That means that glucose – or at least not as much glucose – is not available as an energy source, so the body turns to its fat reserves. Hence, the fat-burning property of green coffee beans!

Numerous studies have been done in recent years on how coffee and CGA in green coffee bean extract affect overweight and diabetic patients.

The results show that both caffeine and CGA have positive effects on lowering patients’ blood sugar levels.

This is great news for people who struggle to control their blood sugar levels, appetites, and cravings [10].

Instant Knockout Usage

Check out their ingredients page to find out more:

How is Instant Knockout different?

What sets Instant Knockout apart from other fat burners is that the creators insist on using all-natural, plant-based ingredients.

There are no artificial ingredients, no harmful fillers, no synthetic substances, and nothing harmful or illegal.

In fact, Roar Ambition is so proud of their product that they list each ingredient and the amount on the label.

Another thing that makes Instant Knockout fat burner unique is that it was originally designed for professional athletes.

That means Instant Knockout had to be effective and top quality right from day one.

Two other things that set Instant Knockout apart from their competition:

  1. Roar Ambition offers a 90-day money-back guarantee if you use the product exactly as prescribed and you don’t get unbelievable results;
  2. Roar Ambition provides free worldwide shipping with a few exceptions.

Instant Knockout Side Effects

When taken correctly, very few negative side effects have been noted by Instant Knockout users.

Some users have complained of problems falling asleep, while others have said it makes them feel lethargic. However, it is impossible to know if these individuals have used Instant Knockout tablets as prescribed.

The key is to take Instant Knockout as directed. Since the supplement contains natural stimulants such as caffeine, it’s recommended that you take your last Instant Knockout tablet five hours or more before bedtime.

Children should not take instant Knockout. The label clearly states that this fat burner should only be taken by adults 18 years of age or older.

Instant Knockout Directions for Usage

Adding Instant Knockout tablets to your day is simple. All you need to do is take one tablet four times a day at regular intervals.

For example, the average user might consider using this schedule for taking his or her Instant Knockout tablets:

  • 8:00 am
  • 11:00 am
  • 2:00 pm
  • 5:00 pm

It’s recommended that you leave at least 5 hours between your last dose and your regular bedtime.

Instant Knockout Fat Burner Supplement Review

Instant Knockout: Pros & Cons


quality ingredients
free worldwide delivery
90-day money back guarantee
backed by scientific research
no monthly commitment
reputable company
product is re-evaluated every 6 months


not suitable for vegans
no discounts or deals
only sold at the website

Where can you buy Instant Knockout?

You will order Instant Knockout only at Roar Ambition’s website. According to the website, if you live in the USA, your Instant Knockout order will ship from the US.

If you live anywhere else in the world, your supplements will ship from the UK.

Instant Knockout promises fast, free worldwide delivery. Check the website for current exclusions.

Shop Instant Knockout Now

Does Instant Knockout get results?

Based on the reviews and pictures we’ve seen in various places on the internet and not just at the Instant Knockout website, this fat burner does get results.

While some users only lose a couple of pounds a month, other users have dropped as much as 10 to 15 pounds in only 30 days!

From what we’ve seen, it seems that Instant Knockout works best for people who are committed to training regularly and eating a healthy diet.

Those people who don’t get results appear that they are not incorporating this supplement into a fitness lifestyle.

Rather, it seems like they are taking what they hope is a magic fat-burning pill and not going to the gym or eating in a caloric deficit.

Instant Knockout is not a magic pill but a supplement that adds to a smart fat loss/workout regimen. MMA athlete Diego Sanchez is an Instant Knockout user and believer.

Instant Knockout Value – is it worth it?

If you’re looking to lose excess fat, Instant Knockout is a product that will make your calorie-cutting experience less uncomfortable.

It really depends on your body and how it handles being in a calorie deficit. If you don’t notice drops in your energy levels and you have no problems retaining lean body mass and strength levels as you cut, Instant Knockout may not necessarily be of value to you.

However, if you’re someone who struggles either physically or psychologically when you’re on a diet, it’s worth it to give Instant Knockout a 90-day trial.

Remember, if you use the product as directed for 90 days and you’re not happy with your results, Roar Ambition offers a 90-day money-back guarantee.

With that in mind, we suggest buying the Ultimate Shredding Stack, which contains three bottles of Instant Knockout. This will reduce your cost and ensure that you have enough Instant Knockout tablets to last for 90 days.

Ultimate Shredding Stack - Instant Knockout

The Bottom Line

Like every other fat burner and supplement on the market, Instant Knockout should not be considered a magic silver bullet.

You will still have to get to the gym for regular workouts, eat a well-balanced diet, and maintain a calorie deficit for Instant Knockout to work.

Instant Knockout works by masking the most common dieting struggles, allowing you to have the energy to go about your everyday life and get in your workouts so you won’t lose strength gains.

In a nutshell, if you take Instant Knockout as required, you must still put in the work at the gym if you want to achieve great results.

You must train smart and eat right. And this supplement will repay you by giving you the boost and the energy you need to crush your goals.

Shop Instant Knockout Now

Check out their website:

**Last updated April 2021




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