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LeanBean vs Instant Knockout Cut (2023 Upd.) Choose Right

Connor Sellers
Published by Connor Sellers | Senior Coach
Fact checked by Donald Christman, BHSc FACT CHECKED
Last updated: May 19, 2023
We personally test every product featured in our reviews and guides. By ordering products anonymously and getting a group of independent testers, we are able to get first-hand experience and provide data-driven recommendations. Learn more.

What Is Leanbean?


According to Ultimate Life, LeanBean is a “clinically proven fat burner for women,” containing ingredients and dosages best suited to average women's weight loss.

This has actually been one of our greatest criticisms of fat burner 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 fat burner 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.

You can check out our thorough review on LeanBean for more insight into the product.

What Is Instant Knockout Cut?

Instant Knockout Box

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 Instant Knockout fat burner 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, Instant Knockout fat burner is 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?

Leanbean and Instant Knockout common Ingredients of the product

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

LeanBean and instant knockout fat burners 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, a couple should be highlighted as unique to each fat burner.

Instant Knockout Cut Ingredients

1. Green Tea Extract

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

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. Caffeine anhydrous is a much more concentrated form, thus may cause crashes if taken in excess.

3. Cayenne pepper

Cayenne pepper is a well known thermogenic (4). By increasing your body temperature slightly, Instant Knockout can help you 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.

Ingredient LeanBean 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?

Man Unable to Sleep

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

This is backed up by the companies' claims (Ultimate Life and Roar Ambition) and the 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, one of the side effects some women might experience when taking the full amount of Instant Knockout is overstimulation as it has quite a lot of caffeine. This can impact your sleep, so be careful with the dose and timing or opt for a good fat burner without caffeine.

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 fat burning supplement contains 180 capsules, 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 lose weight and get through a cutting phase faster, out of all fat burners, your top pick should be Instant Knockout Cut.

Now, you might wonder how we managed to reach an agreement here at the office in the 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, meaning you need not halve the dosage or worry about inaccurate doses.


FAQ Banner

How do you take LeanBean & Instant Knockout Cut?

You take fat burners usually in the form of pills and ideally spread out over the day with your meals. Most fat burning supplements recommend taking them with breakfast, lunch, and an afternoon snack so that you get the best continuous results.

Can you drink coffee with fat burners?

Yes, you can drink coffee with fat burners, but you have to be careful with your total caffeine intake. For one, it can give you jitters and insomnia.

But, once you exceed a certain daily amount on a regular basis, your body will become desensitized and the effects won’t be as noticeable.

Is Instant Knockout thermogenic?

Yes, Instant Knockout is a thermogenic fat burner. With caffeine and cayenne, it will raise your core body temperature slightly.

And the energy for this process is gained from releasing fat cells. With all these effects, expect to lose weight more effectively when working out.

Is LeanBean thermogenic?

Yes, LeanBean is a thermogenic supplement, but it’s not reliant on caffeine to achieve this. It’s a combination of cayenne pepper and turmeric that help to kick your fat burning metabolism into shape.

Can you take Instant Knockout without food?

Yes, you can take Instant Knockout without food; however, when you first start taking it, I would advise that you don’t take it on an empty stomach. Try it out for a few days and see if it agrees with you first.

Can you take LeanBean without food?

Yes, you can take LeanBean without food, however, just like with Instant Knockout, it’s best to take it with a meal. While it may not be as harsh on your stomach, it’s best to stay on the safe side and see how your body reacts first.

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 Cut 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



Our Recommendation For Men
Instant Knockout Cut

Instant Knockout Box

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