Instant Knockout (Fat-Burner) Review 2022: is it Safe? Side Effects and Other Useful Info

Instant Knockout review

Many people decide on taking fat burners – sports dietary supplements that promote weight loss. There are many different products on the market, but which one is the best for you?

Today, we’re going to talk about the Instant Knockout fat burner, revise the ingredients, customer reviews, pros and cons to help you figure out if it’s worth buying.

Company overview:

The fat burner Instant Knockout was created back in 2014 by the British company Roar Ambition and intended for use by athletes, including MMA fighters and boxers. At that time, the company’s products began to be used only by professional sportsmen of different active disciplines. By the way, the company has only 2 products, and both of them are aimed at weight loss and preservation of muscle mass.

Over time, the company’s products Roar Ambition became available not only to sportsmen but also to ordinary people who wanted to achieve weight loss. On the company’s official website, people share their positive experiences with the product and publish their before and after pictures.

Perhaps you still have questions – is Instant Knockout so effective? Well, let’s check the reviews on Amazon and the official website:

  • “The results seen from Instant Knockout, while mixed with proper diet and training, are amazing. I’ve tried a few others, and none seemed to work as well as Instant Knockout”, – Nick, USA.
  • “Before I started taking this product, I was 135 pounds. I took this product for only 2 months and with a bit of dedication, I lost 15 pounds. I am so happy with the results and I have more energy and feel better than ever”, – Karol-ann, Canada.

Before and after Before and after

According to Amazon’s reviews, about 45% of testimonials are positive, and only 16% are dissatisfied with the product for whatever reasons.

  • Roar Ambition’s mission is to help its consumers achieve the results they want, just as professional athletes have done without harming health and maintaining optimal human performance. Thanks to advanced technology and competent scientists, the fat burner is based on natural ingredients.  Also, the composition of Instant Knockout is such that it adheres to a vegan-friendly position.

What can Instant Knockout give you?

Appetite suppression:

It is common for people to feel hungry, but you must agree that this is a very unpleasant feeling. What’s more, when you are hungry, your hands reach for sugary and carbohydrate products. With Instant Knockout, you will no longer have such a craving for unhealthy food; respectively, the accumulation of fat will be less.

Improved Metabolism:

The human body is always expending energy, even when you are sleeping. Instant Knockout speeds up your metabolism, so your body will expend more energy. Even when you do not do anything! And that means that fat is more likely to leave you.

Energy Level:

When you do something all day (work, cleaning, cooking, etc.), you may not have energy left for sports. But with Instant Knockout, that problem is solved because the product is packed with stimulants that will boost your energy. You will be able to work out more!

Instant Knockout is available in pills. The product is quite well tolerated by the body, as it is made from natural ingredients and does not contain GMOs, gluten, and other harmful ingredients.

Instant Knockout tablets should be taken 4 times a day, between meals. In this way, you burn fat for a longer period. It is not recommended to take the last tablet later than 5 hours before bedtime because the product contains caffeine, and this may interfere with your sleep. Consult your doctor before use.

Instant Knockout

What will you learn in this article?

Now we encourage you to read a short content of what you can learn from our review.

What is Instant Knockout?

Instant Knockout is a revolutionary fat burner for men and women. Designed for overall body fat loss and improved overall body composition. The manufacturers use a unique patented formula that consists of natural ingredients as well as additional vitamins that the body needs.

How does Instant Knockout work and help you lose fat?

The use of a fat burner helps normalize and improve metabolic processes in the body, and tones, and adds strength and mood to your workout. In addition, the process of taking it perfectly reduces cravings for carbohydrates and fats.

The science behind the ingredients of Instant Knockout

The ingredients are the most important part of any dietary supplement. Our fat burner contains 6 main ingredients that support weight loss and 3 vitamins D and B.

How is Instant Knockout better than its competitors?

  • natural ingredients
  • highly effective
  • more than 5 years on the market
  • used by professional sportsmen

The best websites where you can buy Instant Knockout

You can buy this supplement only from the official Instant Knockout website. You definitely won’t buy a fake on the authorized site, and the transaction will be safe; moreover, it’s an FDA-approved company.

Product review

Initially, the supplement could only be used by athletes (mixed martial arts fighters, boxers) to burn excess fat quickly, while maintaining their muscle mass and strength. Over time, manufacturers have changed the composition of the ingredients and made the fat burner generally available so that everyone could achieve weight loss results.

Instant Knockout is suitable for both men and women over 18 years of age. According to the manufacturer, the vegan formula was used. With the help of this supplement, you will eliminate the hated fat from the problem areas.

To achieve the best results, you need to follow a proper diet and exercise regimen.

One box contains 120 capsules, 1 month supply. However, the manufacturer recommends that you reduce the number of pills to 2 per day for the first time if you have insomnia or similar disorders.

Given that professional sportsmen used the supplement earlier, their trainers also used the fat burner. For example, the legendary MMA trainer Greg Jackson says that Instant Knockout is the best way to get back in shape. And MMA fighter Diego Sanchez reduced his weight from 190 lbs to 145 lbs with Instant Knockout.


The science behind how Instant Knockout works

We are sure you will be interested to know exactly how the supplement works, what processes take place, and how you can lose extra weight more easily.

Reduces appetite

Glucomannan, which is part of this fat burner, absorbs water in the body. Once it is “full” of water, it becomes larger and thus fills the stomach. Thus you feel less hunger.

Weight Loss

The catechins that are in green tea extract (which is present in the supplement) can enhance thermogenesis. Thermogenesis is when your body produces heat and your body burns calories while digesting food. If you increase thermogenesis, your calorie-burning rate will also increase.

Improved Metabolism

Instant Knockout contains ingredients (such as black pepper extract) that increase the body’s ability to produce heat. Again, thermogenesis is increased, more fat is burned, and your metabolism is accelerated.

Less cholesterol

Glucomannan, which we have already mentioned, suppresses appetite and reduces the total level of cholesterol in the blood.

Ingredient Review


Are there any scientific studies to confirm it's helpful for fat loss?


Confirmed by multiple studies:


Confirmed by 1 study:

Green Tea Extract

Confirmed by multiple studies:

Cayenne Pepper

Confirmed by multiple studies:

Black Pepper Extract

Confirmed by multiple studies:


Confirmed by multiple studies:


Let’s be honest, when we talk about caffeine, we all understand that it is a substance that will cheer us up. And the ingredient is included in the list of Instant Knockout ingredients for a special reason. Sure, it will give you an extra boost of energy, but it also promotes thermogenesis in the body. And, as we mentioned earlier, this is a very important part of losing weight. Though, due to it, some side effects are possible.


This ingredient that we need works together with caffeine. Sooner or later, caffeine will cause an energy slump. But L-Theanine will come to the rescue, smoothing out the nervousness that can appear. L-Theanine also promotes relaxation and improves sleep quality.

Green Tea Extract

Green tea extract oxidizes fats and uses up energy. It contains catechins. Green tea extract helps break down stored energy.

If you have concerns about carbohydrate intake, green tea extract can help digest starch in the body.

Cayenne Pepper

Cayenne pepper is a known thermogenic, meaning it can start your body’s metabolism and start burning fat. It enhances fat oxidation and increases energy expenditure, being a powerful thermogenic.

Black Pepper Extract

Also known as piperine, it promotes weight burning in several ways: it activates metabolism and increases thermogenesis. This is because it acts as a switch for two receptors in the body, TRPA1 and TRPV1, which, when activated, increase energy metabolism and inhibit fat cell formation.


Glucomannan is an extract of the simple root of the congee plant. It is a natural fiber and a complex carbohydrate that, when consumed, absorbs water in the stomach, filling it. We already wrote about it above – when your stomach is full, you don’t want to snack because you feel full.

How is Instant Knockout better/different than competitors?

  • As the manufacturer states, Instant Knockout is made with the highest possible quality in FDA and GMP-approved facilities. They take their reputation quite seriously and have maintained it for years. That’s why the manufacturers don’t skimp on even the smallest details and make sure that all products are thoroughly tested and safe to use.
  • The fat burner is universal for both men and women, so everyone will be able to lose weight.
  • Prevailing, a fat burner consists only of natural ingredients. Which are also tested that they help in weight loss.
  • Loyal price.
  • You won’t have foods to avoid because you won’t want to consume a lot of food.

How has this product evolved from its previous versions?

Now, the company supplies internationally, delivers products faster, and has improved the formulation. In addition, the pills have initially been only supplied to athletes, today, it is available to all people over the age of 18.

Instant Knockout provides powerful substances in innovative forms.

What’s more, the company has created a novelty: a fat-burning shake that is a meal replacement that works in tandem with Instant Knockout pills.

What results you can expect using this product

Often, people are willing to do anything to lose weight. They can starve themselves, count every gram of food, scold themselves for eating a cookie. And when they find the “magic pill”, they expect instant results. But we dare to remind you that the effect of all drugs is cumulative. The longer you use the drug, the better the effect.

Here are some before and after pictures:

Before and after

This man decided to try Instant Knockout and achieved desired results in one month! Can you believe that he could only play 25 minutes of football a month ago? Now it’s a full 90-minute game. Now it’s a full 90-minute game.

Before and after

Before and after

In two months of use, the man reduced the percentage of fat in his body by 4%. He was also able to gain muscle mass.

Side effects

The fat burner is designed to minimize any potential risks and side effects. The only case where you should refrain from using the product is if you are allergic or hypersensitive to the components of the capsules.

The product contains caffeine, so we strongly recommend not taking this supplement with any other products with high caffeine content or stimulants. Some stimulants can cause headaches, diarrhea. But, such cases are more individual.

To reduce the risk of side effects, increase your physical activity, eat right and watch your calorie count. Check with your doctor before use.

Customer reviews (positive)

I think there is not much to write here; the reviews say a lot, but the before and after photos are the most important, so they can give you confidence that Instant Knockout works.

Customer reviews (negative)

Let’s be honest, we didn’t find any negative reviews towards the Instant Knockout product. Some people write that it’s a scam and you shouldn’t trust the product. But these are people who haven’t even tried Instant Knockout.

Our product has a detailed description of the ingredients, you can read how they work on the body and help to burn fat. Moreover, if Instant Knockout didn’t work, it wouldn’t be recommended by athletes and their trainers.

PROS and CONS table

The company provides a 1-month supply of pills and guarantees that you will see results.

Is Instant Knockout brand worth it?


  • Vegetarian.
  • Natural ingredients, strict quality selection.
  • Fast shipping worldwide (free on bulk orders).
  • 30-Days Money Back Guarantee.


  • Not a substitute for a balanced diet and regular exercise.
  • It takes time to notice the benefits and requires a consistent intake regimen.

Cost of the supplement

The price of the supplement ranges from $65 to $195. I think you all know that it is cheaper to buy in bulk. That’s why the company did a promotion, and you can buy several boxes of the fat burner at once for several months ahead. That’s why the price gap is so big. For $195, you get 4 boxes of Instant Knockout (3 + 1 box FREE) + free shipping worldwide.

Alternatives for the product from other brands

PhenQ: it is a weight loss product that is also all-natural. The drug claims to increase the body’s ability to burn calories, reduce food cravings, increase energy and mood by converting food into energy, and suppress feelings of hunger to help control weight.

Burn Lab Pro: it is a fat burner that is suitable for both men and women. It consists entirely of natural ingredients that affect weight loss.

Phen375 Diet: this is a dietary supplement that is designed to help people who are overweight.

Product overview table


Instant Knockout


Instant Knockout 

Product Type



Roar Ambition


Helps to burn fat quickly while saving muscle

Side Effects

No side effects, unless you are allergic to the ingredients 


Four pills per day between meals. Take the last tablet at least 5 hours before bedtime


120 capsules


$69 - $195

Money-Back Guarantee

30 days



Official Website

Click here

Is Instant Knockout worth it?

Instant Knockout is considered a top weight loss supplement. Combined with a healthy diet and regular exercise, you can achieve desired results. The product seems to work, and it’s worth a try. Positive results will come quickly if you follow the recommendations.


  • Should Instant Knockout Be Taken With a Meal?

No, the supplement should be taken between meals. Please, see below for a sample drug regimen.

  • Is Instant Knockout Thermogenic?

Yes, the supplement contains ingredients that increase thermogenesis in the body.

  • Is Instant Knockout Approved by The FDA?

Yes, the entire ingredient composition is fully FDA and GMP-approved.

  • How long will it take for Instant Knockout to work?

Depending on your body, many see the first results after just a few weeks. Recall that the effect is cumulative; the longer you use the drug, the greater the effect.

  • Where can I buy Instant Knockout?

You can only buy the product from the manufacturer’s official website, so you won’t come across any fakes.

Instant Knockout

Instant Knockout

We Recommend

  • Vegetarian.
  • Natural ingredients, strict quality selection.
  • Fast shipping worldwide (free on bulk orders).
  • 30-Days Money Back Guarantee.

Anna A. Cudney

This is Anna A. Cudney. I have created “Lean Mates” website to help people lose body weight. I have faced the problem of obesity and tried many things to re-shape my body. My goal of this website is to share my experience to help others lose their weight too.

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