Best Fasted Fat Burner Supplement: Ultimate Buyer’s Guide (2023 Updated)




If you’re looking to get serious about fat loss, you need a fasted fat burner supplement.

We’ve done the hard work for you and tested the best on the market and the results are in:

Burn Lab Pro is the top stim-free fasted fat burner, while Capsiplex Burn is ideal if you want the best all-rounder with caffeine.

Read on to discover how these products can turbocharge your fat loss!

The Best Fasted Fat Burner in 2023: Burn Lab Pro

fasted fat burner

Product Overview

Picture this. You’ve been working out hard, but you’re not seeing the results you want. 

It’s frustrating when you put in all the effort and don’t see any changes. You might even feel like you’re doing something wrong.

Burn Lab Pro (formerly known as Performance Lab Sport Fat Burner) can help. This stim-free fat burner is ideal for training during periods of fasting and helps your body burn more calories than through diet and exercise alone.

Worried about losing muscle while on your cut? Forget about it. Burn Lab Pro helps preserve those hard-earned gains so you can feel good, and look good too.

Read our complete Burn Lab Pro review here


  • Forslean Coleus Forskolii – 375 mg
  • Capsimax Cayenne Pepper Extract – 75 mg
  • HMB ß-Hydroxy ß-Methylbutyrate – 1500 mg
  • NutriGenesis GTF Chromium – 90 mcg
  • BioPerine Black Pepper Extract – 3.75 mcg


  • Preserve muscle mass while aiming to reach your fat loss goals
  • Power through your fasted workouts, stim-free
  • Controls your appetite to help you stick to your calorie deficit

Get the best price on Burn Lab Pro here

The Best Fasted Fat Burner with Caffeine in 2023: Capsiplex Burn

Product Overview

Accelerate fat burning, increase metabolism, and reduce fatigue with Capsiplex BURN!

An advanced formula that helps you get the lean body you desire with less fatigue than ever before.

Get faster results in the gym and see the difference with Capsiplex BURN — because every second counts.

Read our complete Capsiplex Burn review here


  • Vitamin B3 – 16 mg NE
  • Vitamin B6 – 1.7 mg
  • Vitamin B12 – 2.67 mcg
  • Iodine – 150 mcg
  • Chromium – 170 mg
  • L-Tyrosine – 800 mg
  • L-Arginine HCL – 500 mg
  • Innoslim® – 250 mg
  • Caffeine Anhydrous – 200 mg
  • Capsicum Fruit Extract – 100 mg
  • Green Tea Leaf Extract – 76 mg
  • Black Pepper Fruit Extract – 20 mg
  • Green Coffee Bean Extract – 4.5 mg


  • Supercharge Your Metabolism: Burn more fat, even while you fast.
  • Banish Hunger: Suppress appetite naturally and keep hunger cravings at bay.
  • Feel More Energised: Give yourself the boost to power through your workouts with Capsiplex Burn.
  • All-Natural Ingredients: No artificial ingredients or additives, just effective natural fat loss extracts.

The Top 5 Fasted Fat Burner Ingredients and the Science Behind Them

Forslean® Coleus Forskolii

ForsLean® is an advanced form of Coleus Forskohlii, which helps to accelerate fat loss and build muscle. It’s research-backed by four human clinical trials that confirmed its effectiveness in helping users lose weight while improving mood, focus, and clarity.

Evidence suggests that Coleus Forskohlii can positively influence weight loss, which means it could help you achieve your desired physique by boosting fat loss and increasing muscle mass simultaneously [1].

Capsimax Cayenne Pepper Extract

Capsimax® cayenne pepper extract is an effective fat burning ingredient that helps you to burn more fat during exercise without the jittery effects of caffeine and other stimulants.

An additional benefit is that its active ingredients, capsaicinoids, have been shown to suppress the appetite, reduce food cravings, and boost your metabolism, making it easier for you to stick to your calorie deficit.

Not only will you eat less, but research also shows that those who take this powerful thermogenic ingredient regularly may consume 140 fewer calories and burn 130 more each day!

HMB ß-Hydroxy ß-Methylbutyrate

HMB is a fantastic addition to any fasted fat burner, as it helps lower your chance of muscle breakdown rates while burning fat.

Ongoing research suggests it may help build and maintain lean mass, meaning you can cut without the fear of losing all your hard-earned gains.

In fact, one study showed that those who supplemented with HMB benefited from advantageous body composition changes by stimulating enhanced aerobic and anaerobic capacity [2].

GTF Chromium

Considering the many benefits of GTF chromium, you’d be wise to make sure your fasted fat burner contains this powerful fat burning mineral.

Chromium is a trace element that helps the body in terms of reducing insulin resistance, and it’s been shown to play an important role in weight management as well.

When combined with regular exercise and a healthy diet, chromium can help you achieve better results while aiming to get rid of fat, while also supporting cognitive function and memory to ensure you remain focused during the toughest of workouts.

BioPerine Black Pepper Extract

BioPerine black pepper extract is an ingredient that stimulates a rise in body heat, which can help you burn more calories and boost your metabolism, particularly when combined with intense training on an empty stomach.

What’s more, BioPerine has been found to increase the absorption of other nutrients by up to 20 times, making it a valuable addition to any fasted fat burner supplement.

Its other potential benefits include:

  • Enhanced brain function
  • Alleviated inflammation
  • Stabilization of blood sugar levels

What Are The Benefits of Training While Fasted?

When you train in a fasted state, you force your body to utilize stored fat as its primary source of energy. Your body has no other choice—it’s running on empty after an overnight fast and needs to find fuel fast.

This is a good thing because it means you’re using more stored body fat as an energy source. And when you train fasted and take fat burners like Burn Lab Pro, you can help burn fat and maintain lean muscle mass during intermittent fasting.

Not only does this fasted fat burner help preserve muscle mass while you’re cutting, but it also helps boost exercise performance with no stimulants, ensuring:

  • Increased fat-burning potential
  • Greater mobilization of stubborn body fat stores
  • Improved insulin sensitivity

Do Fasted Workouts Increase Fat Burning?

Many people turn to fasted exercise routines aiming to take their fat-burning potential to the next level. But is this really true?

The answer is yes. Studies have shown that fasted training can burn up to 20% more body fat than non-fasted workouts.

As long as you remain in a consistent calorie deficit, fasted workouts can help you reach your fat burning goals efficiently and effectively.

Are There Any Downsides to Training While Fasted?

There are a few potential drawbacks to fasted training, including the fact it can be tough mentally. It’s hard to push yourself when your energy levels are down, you feel hungry, and you have little strength during a workout. So, it’s easy to see why it’s not for everyone.

Training while fasted can also be tough physically. You may find that you’re not as strong or as fast as you usually are. Then there’s the potential issue of muscle loss if you’re not careful.

If you’re considering fasted training, make sure you talk to your doctor first to make sure it’s safe for you. And if you’re just starting out, be sure to start slowly and escalate the intensity and duration of your fasted workouts gradually.

Once you’ve taken these factors into account, a fasted fat burner can be a great way to help you maximize your fat loss potential.

Why You Should Do Your Research When Selecting the Best Fat Burner

If you’re asking yourself if it’s okay to take a fat burner like Burn Lab Pro while fasting, you’ll be happy to know that you definitely can.

However, looking for a fat burner to use during your intermittent fasting schedule (or even after you’ve had your first meal of the day), you’ll definitely want to avoid low-quality fat burners as they can cause all sorts of side effects including jitters, energy crashes, and digestive discomfort.

This is usually because these fat burners include stimulants such as caffeine in excessive amounts. These fat burners might help your body use fat and ramp up fat breakdown, but the risk of side effects just isn’t worth it.

Luckily, side effects aren’t anything you need to worry about with Burn Lab Pro, as it enhances your fat loss results with no stimulants or poor-quality ingredients in sight.

Sticking to A Calorie Deficit: The Key to A Successful Fat-Burning Journey

If you want to lose fat, the most important thing you can do is create a consistent calorie deficit. This means eating fewer calories than your body needs each day in order to burn fat for energy.

It’s not an easy thing to do, particularly if you’re trying to stay in a calorie deficit consistently for the first time. But when it comes to losing fat, a calorie deficit is the only way to go.

That’s where a fasted fat burner like Burn Lab Pro can come in handy. This stim-free fat burner helps control your appetite, making it easier for you to stick to your calorie deficit without feeling hungry or deprived.

The Best Fasted Fat Burner – Final Thoughts

While training on an empty stomach may sound like it’s only for the hardcore, it’s a great option even if you’re new to exercising and looking to lose a few pounds.

The added boost of energy from the best fat burners for intermittent fasting can help you power through tough workouts, increase the number of calories you burn, and push yourself harder than ever before while preserving muscle mass. and boosting calorie burn potential.

Fasted cardio is also an excellent way to ramp up your daily intake with minimal effort since all forms of low-intensity exercise count towards your goal when in this state!

If fasting sounds too difficult or intimidating, consider combining Burn Lab Pro alongside a calorie deficit and regular exercise.

This fasted fat burner contains no stimulants but still provides that extra burst of energy needed for enhancing your exercise performance before your first meal of the day.

Science-backed. All-natural. What more could you wish for?


Do Fat Burners Break A Fast?

That depends on the ingredients used in the fat burner! But since this is a guide to taking a fat burner while intermittent fasting, you’ll be happy to know that Burn Lab Pro doesn’t contain any calorie-containing ingredients, so it won’t break your fast.

Can I Take Burn Lab Pro If I’m Not Fasted?

Yes! You can take Burn Lab Pro at any time of the day, whether you’re fasted or not as it’s stimulant-free. In other words, it doesn’t contain caffeine or similar ingredients like green tea extract. But if you’re looking to maximize fat loss potential, we recommend taking it while fasting for the best results.

What Is Intermittent Fasting?

Intermittent fasting (IF) is an eating pattern where you cycle between periods of eating and fasting. It can be done in a number of different ways, but the most common is a 16-hour fasting period and then eating all your food within an 8-hour window. Alternate-day fasting is another popular form of IF.

There are several different health benefits associated with intermittent fasting, including helping you lose extra fat mass, improved blood sugar control, and reduced inflammation. IF can also help improve brain function and may even have some anti-aging effects.

Do You Burn More Fat Exercising On An Empty Stomach?

Training fasted forces your body to burn stored fats as fuel, making fasted workouts uniquely beneficial when losing weight because they help to ramp up your overall calorie burn, especially when paired with a great fasted fat burner such as Burn Lab Pro.

How Do Fasted Fat Burners Work?

Fasted fat burners work by providing your body with an added boost of energy that helps you train harder for an extended period in a fasted state. This can help you burn more calories and lose weight faster.

What Do I Look for In a Fat Burner?

The best fasted fat burners are those that help you lose weight while preserving muscle mass. Burn Lab Pro is the clear winner in this category, thanks to its powerful formulation of thermogenic fat burning ingredients muscle-preserving ingredients, including cayenne pepper extract.

Is It OK To Do Fasted Cardio Every Day?

Yes, fasted cardio is a great way to ramp up fat loss. In fact, it’s one of the best ways to do so.
When you’re in a fasted state, your body is primed and ready to burn fat for energy. It doesn’t always need to be intense either since even low-intensity cardio in a fasted state ramps up your daily calorie burn, which includes walking!

Will Eating Spicy Food Help Me Get Rid Of More Fat?

Capsaicin in chili peppers may boost metabolism and help burn calories. Capsaicin is also known to suppress appetite, so the high thermic effect of foods containing lots of spice may also help you eat less.

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