Instant Knockout Review

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Let’s be honest here; losing weight is hard. Eating less and exercising more is no-one’s idea of fun, and every dieter hates giving up their favorite foods – even for just a few weeks. If only there was a way to make dieting easier…

Instant Knockout is a nutritional supplement for dieters looking to lose weight faster. This powerful product contains several potent ingredients to reduce hunger and speed up fat burning. It will also increase your energy.

This supplement is not for the faint-hearted; it contains a large dose of caffeine and several other high and non-stim fat burning ingredients.

You’ll definitely feel it working, and it’s probably not a good product for fat burner novices, and definitely NOT recommended for people under 18 years of age or pregnant or breastfeeding women.

But, if you are looking for one of the most potent legal fat burners currently available, Instant Knockout is one to consider.

What is Instant Knockout?


Instant Knockout is a high-stim fat burner that contains a blend of ten potent ingredients. Initially developed for boxers and MMA fighters, Instant Knockout attacks fat on three fronts at the same time, so you lose weight faster:

Increased metabolic rate

Your metabolic rate is the number of calories you burn per day, including while you exercise and sleep. The higher your metabolic rate is, and assuming you are eating less, the faster you’ll lose weight.

Less hunger and fewer cravings

Losing weight and burning fat invariably means eating less and giving up some of your favorite foods. This causes hunger and cravings. While you might be able to resist the allure of forbidden foods for a few hours or even a day or two, eventually, it’ll grind down your willpower, and you’ll give in.

Every dietary slip-up will put the brakes on your progress. Instant Knockout contains ingredients specifically chosen for their appetite and craving suppressing characteristics.

More energy

Whether you want to storm through a challenging fat-burning workout or just get through your day, diet-induced low energy levels can make everything you do harder than it needs to be. Instant Knockout contains energizing ingredients that will give you the power to rise to any challenge, in the gym, at work, or at home.


Instant Knockout contains ten proven, fat-burning ingredients.


Green tea extract


High in antioxidants, caffeine, and a substance called EGCG, green tea extract is a proven fat burner and health booster. That’s why it’s a common ingredient in many fat burners.

Cayenne Pepper Seeds


Proven thermogenic, cayenne pepper seeds increase your core temperature so that you burn more calories and fat, even while you sleep. They also increase insulin sensitivity, so your body can better use the carbs in your body.



Source of fiber, glucomannan is a proven appetite suppressant. With no hunger to worry about, you are less likely to cheat on your diet.

Caffeine Anhydrous


Caffeine is a potent fat burner and energizer. Caffeine anhydrous is simply caffeine powder. Instant Knockout contains 300mg of caffeine per serving.

Vitamin B6


An important vitamin that helps to use and store energy in the body via proteins and carbohydrates, its great for metabolism and works together alongside B12.

Vitamin B12


Not only does this vitamin nerve and red blood cells healthy it also works very well  alongside vitamin B6 for energy and carb metabolism, to prevent tiredness and weakness.

GTF Chromium


A mineral that can help manage blood glucose for more stable energy and fewer cravings. GTF chromium also helps increase insulin sensitivity for better carbohydrate metabolism.



This mineral is vital for immune system function and healthy testosterone production. Instant Knockout is NOT a testosterone booster, but by optimizing your levels of this critical hormone, your body is better equipped for fat burning.



A thermogenic fat burner that also increases the bioavailability of the other ingredients. Better bioavailability means a little of this product goes a very long way.

Green Coffee Bean


A renowned fat burner and metabolism booster, like green tea extract, this is a common fat burner ingredient because it works!

How and when to use Instant Knockout?

Instant Knockout is very easy to use. According to the manufacturer, take one capsule four times per day.

  • One first thing in the morning
  • One before lunchtime
  • One in the afternoon
  • One before the evening meal

This will keep your body supplied with a steady stream of active ingredients while ensuring you are still able to sleep at night. Because this product contains a lot of caffeine, you should avoid taking it too close to bedtime.

Possible side effects

Instant Knockout is a very powerful supplement, and as such, it may cause a few unwanted side effects, including:

  • Nausea
  • Headaches
  • Elevated heart rate
  • Anxiety
  • Tremors
  • Frequent urination
  • Insomnia

The cause of these effects is caffeine. Instant Knockout contains the caffeine equivalent of three cups of coffee, which is quite a big hit in one go. Taking four doses per day may be too much caffeine for some users.

If you experience any unwanted side effects, try taking just three or even two capsules per day instead of the recommended four. Also, if you are having trouble sleeping, consider skipping your last pill of the day so that you are caffeine-free when bedtime rolls around.

Is it Safe for Women to Use?

While Instant Knockout does contain testosterone-boosting zinc, it’s not going to have any masculinizing effects on women, so this product is safe for both genders to use. However, because of its high caffeine content, this supplement is not safe to use during pregnancy or while breastfeeding.

Pros and Cons


Please consider the following before buying or using Instant Knockout:


  • Potent, proven formulation
  • Good for fat burning, increased energy, and preventing hunger and cravings
  • Effects you’ll be able to feel
  • Easy to use
  • Used by professional athletes
  • Backed by a 90-day guarantee
  • Multi-buy discounts always available


  • Only available online
  • May be too high in caffeine for some users
  • The bottle contains only a 30-day supply
  • Not suitable for vegetarians or vegans as the capsules are made from gelatin

Bottom Line

A lot of fat burners only have a light to moderate effect. They’re under-dosed to ensure they don’t cause too many noticeable side effects. They work, but their impact is very subtle. This means they’re ideal for long-term use and by people who are very sensitive to the ingredients.

Instant Knockout is different in that it’s formulated to be much more powerful. With 300mg of caffeine per serving, you’ll definitely feel this product working! And it’s more than just a caffeine supplement; Instant Knockout contains nine other fat-burning, appetite-suppressing, energy-boosting ingredients to help you lose fat faster than ever before.

If Instant Knockout has a disadvantage, it is that it may be too powerful for some users. While you could take fewer doses per day, each individual capsule contains 500mg of active ingredients, and that amount is unmodifiable.

Instant Knockout is a potent fat burner that will boost your metabolism and give you all the energy you need to crush your workouts. Its effects aren’t subtle, but sometimes, the best tool for the job is a great big sledgehammer!

Instant Knock Out

4.7 Score

This is one of the most potent fat burners on the market.

Review Breakdown

  • Ingredients
  • Effectiveness
  • Value for Money

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