Instant Knockout Review: Everything You Need to Know

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Bottom Line: Instant Knockout is an all-natural formula made with quality ingredients, but it may not be the right choice for everyone.

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Set Alert for Product: Instant Knockout Fat Burner Diet Supplement Pill for Men and Women - High Impact Weight Loss Dietary Pills Knock Out by nutra4health - 60 Days - $39.95
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Instant Knockout Review:  Everything You Need to Know
Instant Knockout Review: Everything You Need to Know

$99.95 $39.95


7 Total Score

Bottom Line: Instant Knockout is an all-natural formula made with quality ingredients, but it may not be the right choice for everyone.

7.3Editor's score
Does it Work
Ease of Use
7User's score
Does it Work
Ease of Use
  • Features several clinically proven ingredients
  • Comes with a 90-day money back guarantee
  • High levels of caffeine
  • Money back guarantee requires you to order a three month supply
  • Must be taken four times a day
Add your review  |  Read reviews and comments

I’m always on the lookout for new fat burners to try. I know eating right and exercising is the way to a healthy body, but I like to see if these supplements can speed the process, or if they are just hype. Most of them are really just hype, but I still keep trying different ones.  Instant Knockout is a fat burner that was targeted at MMA fighters. My review includes a bit of my personal experience, along with research to support the ingredients, other user reviews, and more. 

What I have to say may get people talking…


Instant Knockout logo

The official Instant Knockout logo


If you’d like to try it for yourself, Instant Knockout can be purchased through Amazon or using their Official Site.

1. What Is It: A Closer Look at Instant Knockout

The product is a fat burner made for athletes to drop weight quickly and safely. According to the company, MMA fighters use it to cut weight when they need to. The supplement can keep the appetite at bay and boost metabolism.

2. History of the Brand: How Did Instant Knockout Start?

It’s produced by Roar Ambition, a supplement company based in London, England. In a press release dated October 2015, the company reported success in their first year with Instant Knockout and TestoFuel in the U.S. market.

3. Types of products

In addition to Instant Knockout, Roar Ambition has a full line of pre-workout supplements, other fat burners, and testosterone boosters. Their products include:

  • Instant Knockout
  • Hunter
  • Testofuel 
  • Gauge
4. Instant Knockout Ingredients

Instant Knockout contains:

  • Vitamin B6
  • Vitamin B12
  • Zinc
  • Chromium picolinate – may help control blood sugar levels
  • Green Tea Leaf Extract – High in antioxidants. Shown in numerous studies to help boost metabolism
  • Green Coffee Bean Extract – high in chlorogenic acid and thought to boost metabolism
  • Cayenne Powder – improve digestion and boost body temperature to burn more fat
  • Glucomannan – suppresses appetite by absorbing water to fill your stomach. May also help lower cholesterol as it moves through the digestive tract
  • Caffeine Anhydrous – This stimulant is known to boost the metabolism
  • Black Pepper Extract – used to enhance the bioavailability of other ingredients in the formula
Green coffee bean

Green coffee beans are high in chlorogenic acid, which is thought to burn fat.

A study in the International Journal of Obesity showed, “Catechins or an epigallocatechin gallate (EGCG)–caffeine mixture have a small positive effect on WL [weight loss] and WM [weight management]. The results suggest that habitual caffeine intake and ethnicity may be moderators, as they may influence the effect of catechins.”

A study in Gastroenterology Research and Practice revealed, “The meta-analytic result reveals a significant difference in body weight in GCE [green coffee extract] compared with placebo (mean difference: − 2 . 4 7kg; 95%CI: − 4 . 2 3, − 0 . 7 2). The magnitude of the effect is moderate, and there is significant heterogeneity amongst the studies. It is concluded that the results from these trials are promising, but the studies are all of poor methodological quality. More rigorous trials are needed to assess the usefulness of GCE as a weight loss tool.”

A study in Minerva Medica showed, “Due to the marked ability to satiate patients and the positive metabolic effects, glucomannan diet supplements have been found to be particularly efficacious and well tolerated even in the long-term treatment of severe obesity.”

5. Where is it manufactured?

It appears the supplement is manufactured in London.

6. Who’s Instant Knockout For?

Instant Knockout is for anyone who wants to lose weight and build muscle. There is another formula, Instant Knockout Women that’s designed for women to use.

7. How Does Instant Knockout Work?

It provides the body with several ingredients designed to boost the metabolism – caffeine, green tea, cayenne pepper, and green coffee bean. 

It also provides the body with vitamins, and glucomannan – an appetite suppressant.

8. Does Instant Knockout Work?

Yes, when taken at the four times per day dose, you are getting clinically proven doses of many of the ingredients. That said, you may not be able to take that much every day because of side effects.

9. Instant Knockout Benefits and Results

You’ll get the best results if you take Instant Knockout with a balanced diet and regular exercise. It’s not a magic pill, and won’t magically melt the pounds away without a little work on your part. If that was the case, we’d never have to buy anything else!

You can expect to have more energy and less of an appetite throughout the day. You can use other supplements with it, so long as they don’t contain caffeine or other stimulants. Too many stimulants can make you sick and wreak havoc on your body.

10As far as taste goes…

There’s nothing to worry about here since you just take the pill and swallow it up to four times a day.

11. Instant Knockout Side Effects

Instant Knockout can cause insomnia.

Though the formula is all natural, that doesn’t mean it’s free of side effects. I experienced some insomnia because I took a dose too close to bedtime. I also saw reports of irritability, anxiety, headaches, and even drowsiness.

12. Instant Knockout Product Warnings

Do not use for more than a couple of months. Don’t take it late at night, or with other supplements containing stimulants. Do not take if you are pregnant, nursing, or under the age of 18. If you are taking prescriptions to treat any medical condition, speak to a doctor before beginning this supplement.

13. Any Instant Knockout Lawsuits?

At this time, there does not appear to be any lawsuit against Instant Knockout or the company that makes it.

14. Customer Reviews on the Web: What Users Are Saying

“Did not have any success with this product. I work out and eat healthily and this didn’t help with my weight loss at all.” – Amazon Customer

“Not a big believer in fat burners but this one is definitely one I recommend!” – Melissa Speer

“It’s an energy pill that you can feel but if you’re looking for the Instant Knockout from bodybuilding magazines and sites this isn’t it. Those are from a company called “Roar Ambition”, this company is called “Nutra4health”. A little intentionally deceptive marketing got me.

On the label comes the statement “When combined with exercise and a reduced-calorie diet, PRODUCT NAME can help you reach your weight loss goals.” Kind of annoying.” – Matt

15. Instant Knockout Competitors
  • Animal Cuts
  • Shred Jym
  • Lean Mode
  • PhenQ
16. Would Instant Knockout Work with Your Diet?
Instant knockout supplement facts

This is the supplement facts for Instant Knockout.

This should work with any diet as it does not contain any gelatin, according to the supplement facts label above. The only thing that may be an issue is the artificial colors. 

17. Verdict: Would I Recommend Instant Knockout?

Honestly, I had a good experience with it, and I liked that I was able to see the amount of each ingredient in the formula. I would recommend it as long as you are not too sensitive to caffeine. You will have to give up your morning cup of coffee if you take this!

There are a lot of promo codes available, like this one for 25 percent off, so you can at least save a bit of money if you decide to try it.

Just be sure to talk with your doctor to make sure you’re healthy enough to try it. And make sure you get as much information as you can about it. If you start to feel off, stop using it.

Instant Knockout can be purchased through Amazon or using their Official Site.

Does it Work
Ease of Use
+ Positives:
  • Features several clinically proven ingredients
  • Comes with a 90-day money back guarantee
- Negatives:
  • High levels of caffeine
  • Money back guarantee requires you to order a three month supply
  • Must be taken four times a day

Additional information

Specification: Instant Knockout Review: Everything You Need to Know

Dietary Friendly

Artificial Sweeteners Free, Dairy-Free, Gluten-Free, High-Calorie, High-Carb, High-Fiber, High-Protein, Lactose-Free, Low-Acid, Low-Calorie, Low-Carb, Low-Fat, Low-Sodium, Low-Sugar, Nonfat, Sodium-Free, Soy-Free, Vegan, Vegetarian

Type of Consumable


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