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LeanBean vs Instant Knockout
What’s The Better Option For You?

LeanBean vs Instant Knockout featured image
Written by Connor Sellers
Last Updated on

We recently had quite a heated debate here in the office over fat burner supplements that we have all been recommending to clients and friends. The two products we all like are LeanBean and Instant Knockout, but we couldn’t seem to agree on which was best.

So, as the ever-present and self-appointed TotalShape sheriff, I decided to do some more objective research to try and settle the LeanBean vs Instant Knockout debate without the need for UN involvement. 

The good news is that both products remain on our recommended list, but we’ve found a way to agree on their optimum uses. 

What Is Leanbean?

According to Ultimate Life, LeanBean is a “clinically proven fat burner for women,” which contains ingredients and dosages that are best suited to average women. 

This has actually been one of our greatest criticisms of supplements in general, in that they are pretty much always provided in a way that makes them too strong for female athletes.

The results can sometimes be some side effects like upset stomach or jitters from too many stimulants.

So, we all welcomed the arrival of a workout product designed specifically with women in mind. 

I’ll get to the specific ingredients shortly, but the good thing is that it’s based on natural ingredients, This greatly reduces the risk of toxin exposure, and makes it a lot easier to determine if you have any possible allergies.

It’s recommended to take 6 capsules per day: 2 during breakfast, lunch, and dinner, respectively.

See this page for our full review on LeanBean.

What Is Instant Knockout?

Instant Knockout is a fat burner especially designed for bodybuilders and performance athletes. With that said, there is no reason why this product won’t work for other people to take advantage of the fat loss benefits. 

Roar Ambition has designed the formula to work at it’s best when combined with a healthy diet and a fitness routine that involves training several days a week.

It should not be mistaken for one of the snake oil products that you sometimes see advertised on social media. You’ll still have to put in a reasonable amount of effort for it to work.

Very similar to LeanBean, both supplements are based on natural ingredients that have been scientifically researched to demonstrate they are effective at burning away the flabby stuff. 

See this page for our full review on Instant Knockout.

What Are Their Common Ingredients?

Common Ingredients of the product

I think at this stage it’s best to actually look at some of those ingredients.

LeanBean and Instant Knockout both work as metabolic boosters, and there are several ingredients that overlap between the two. 

1. Glucomannan

This water-soluble dietary fiber has been tested in some studies for effective weight loss (1). It has been shown to help with appetite suppression and to increase the effectiveness of your digestive system.

2. Vitamins B6 & B12

These vitamins are helpful for both regulation of metabolic rates, as well as combating tiredness. For busy people trying to fit in some extra workouts, this can make a difference. 

3. Chromium

One study I found has linked increased chromium intake with a reduction in insulin resistance (2). This can contribute to a more balanced blood sugar level and better weight management.

4. Zinc

Generally speaking, zinc is useful for digestive and metabolic processes that involve fat and fatty acids. For men, it also plays a role in testosterone levels. 

5. Piperine

You might have noticed this on more supplements lately. Basically, it helps make your digestive system more effective at absorbing micronutrients.

6. Green Coffee Bean

The final common ingredient is green coffee bean. While it contains a small amount of caffeine, it is contained in these products for its antioxidant properties that help remove toxins.

What Are Their Unique Ingredients?

While there are quite a few overlapping ingredients, there are a couple that should be highlighted as unique to each.

Instant Knockout Ingredients

1. Green Tea Extract

I was quite surprised to hear that green tea can help with fat oxidation (3). Personally, I hate the flavor of green tea, so it’s great to see some extract in supplements.

Check this video below to know more about Green Tea Extract.

2. Caffeine Anhydrous

This is possibly one of the big advantages of Instant Knockout as caffeine is one of the more powerful thermogenics. Just be careful with any coffee you drink during the day to avoid any jitters.

3. Cayenne pepper

It is a well known thermogenic (4). By increasing your body temperature slightly, it can get rid of some extra fat.

LeanBean Ingredients

There are a few more extra LeanBean ingredients when compared to Instant Knockout.

1. Choline

Being able to release fat cells is only one part of the puzzle, but getting that fat transported and transformed into energy is just as important. Choline is a nutrient that studies have shown to help with this delivery process (5).

2. Chloride

This electrolyte plays a role in keeping you hydrated. Your digestion and metabolism can significantly suffer if you don’t maintain an optimum level of hydration. 

3. Turmeric

This is a spice that I have been taking for a long time, mainly for its effects on brain functionality and motivation. However, it is also one of the top thermogenics after caffeine.

Turmeric works as a supportive supplement for improving the body’s health, so it can work to lose weight on its own. It isn’t meant to be used as any kind of overnight gimmick to shed pounds quickly.

4. Garcinia Cambogia

This Asian fruit has become increasingly popular and more commonly stocked in health food stores and even farmers’ markets. The main reason for including it in LeanBean is for its appetite-suppressing properties.

5. Acai Berry

While the true effects of this berry are still not fully understood, there are some early study indications that it can impact metabolic rates (6). And because it is a completely safe product, there is no real downside to including it. 



Instant Knockout




Garcinia Cambogia

Acai Berry

Green Tea Extract

Caffeine Anhydrous


Cayenne Pepper

Vitamins B6 & B12



Green Coffee Bean


Do These Have Any Potential Side Effects?

The good news is that both Instant Knockout and LeanBean don’t have any known side effects when they are taken as recommended.

This is backed up by hundreds of website review comments where men and women didn’t report any problems unless there were allergies to some of the ingredients. 

That being said, some women might find that taking the full amount of Instant Knockout can be overstimulating as it has quite a lot of caffeine. This can impact your sleep, so be careful with the dose and timing.

Sleep timing changes

How Much Do They Cost? 

From a pricing perspective, LeanBean and Instant Knockout have very similar offers. Each bottle is a months’ supply at a price of $59. However, there are excellent special offers where you can buy 3 bottles and get a fourth one for free at a price of $185.

One bottle of Leanbean contains 180 capsule, which is good for one month. Each capsule has 3000mg of Glucomannan and it’s approved for weight loss in the European Union.


Now, as a woman, you could save a bit of money if you purchase Instant Knockout and reduce the daily dosage. This won’t impact your fitness goals too much, but you would need to do some testing to figure out the optimum dose. 

I would also recommend that you only purchase these products on their company websites, as that’s the only place you’ll get the money-back guarantee. You can access the LeanBean website here and Instant Knockout website here.

Making the Right Choice

man and woman exercising

For men and performance athletes looking to get through a cutting phase faster, your top pick should be Instant Knockout.

Now, you might be wondering how we managed to reach an agreement here at the office in the whole Instant Knockout vs LeanBean debate. 

Basically, it all came down to looking at the fat burner supplements from a gender and goals perspective.

Unless you’re a high-performance or professional female athlete, LeanBean is going to be the best option for women. It has the right ingredients in just the right amounts. 

But then, ​which metabolic type are you? Find out if you are a sugar burner or a fat burner type.


FAQ Banner

How do you take fat burners?

Can you drink coffee with fat burners?

Is Instant Knockout thermogenic?

Is LeanBean thermogenic?

Can you take Instant Knockout without food?

Can you take LeanBean without food?

Which Fat Burner Should You Choose?

At this stage, you should be in a much better position to come to a final decision on LeanBean vs Instant Knockout. The best fat burner for your personal circumstances will entirely depend on your gender and goals. 

For men and high-performance athletes, Instant Knockout is going to deliver the optimum ingredients to speed up a cutting phase.

For women who just want to lose some unwanted fat reserves will be far better off with the female formula provided by LeanBean.

Place your order today and if you’re brave enough, post some before and after pictures on your social media pages. 

Our Recommendation For Women


Instant Knockout
Our Recommendation For Men

Instant Knockout Product Box

About the author

Connor Sellers

Connor Sellers is a personal trainer and senior coach at Total Shape. His mission is to inspire people to relentlessly pursue their fitness and lifestyle goals. He believes staying fit has an overall positive effect on one’s body, mind, and spirit. Read more about him here​.