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Burn Lab Pro Review (2023 Upd.) Does This Fat Burner Work? 

Connor Sellers
Published by Connor Sellers | Senior Coach
Last updated: September 21, 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.

A major priority of the health and fitness plans I put together for my clients is reducing fat cells and BMI, and Burn Lab Pro Fat Burner is a product that is frequently recommended to me for exactly this purpose.

When coupled with a careful diet plan, regular exercise, and even some intermittent fasting, fat burners can speed up the process of achieving your body composition and weight loss goals.

In this Burn Lab Pro review, we’re going to look at its mechanism, the ingredients and science behind it, and how/if you should take it yourself to burn fat and gain muscle mass.

Also, to avoid confusion, they recently got rebranded to Burn Lab Pro; the old name for these supplements was Performance Lab. So whenever you encounter Performance Lab or Performance Lab Sport, bear in mind that is the old name, but the same fat-burning supplement.

What Is Burn Lab Pro?

Burn Lab Pro Product on a table

Burn Lab Pro, based on 1st hand experience, is a fat burner that may optimize fat loss without sacrificing muscle mass.*

It was previously known as Performance Lab Sport Burn Manufactured by UK-based Opti-Nutra in a GMP-certified facility.

Opti-Nutra calls Burn Lab Pro innovative, and our 1st hand experience with it confirms its effectiveness.

Its formula of plant-based ingredients promises to provide a calorie-burning boost, lean muscle growth, and accelerated recovery when combined with diet and exercise.

Burn Lab Pro can pass a banned substance test and contains no synthetic additives, artificial colors, or preservatives.

Burn Lab Pro is only available for purchase on the official website.

How Does Burn Lab Pro Work?

Burn Lab Pro is a popular brand of fat burners that claim to help individuals reduce stored fat, enhance muscle mass, and improve overall body composition.

Burn Lab Pro, based on 1st hand experience, works by triggering thermogenesis and lipolysis, which can start the fat-burning process in your body.

Generally speaking, body fat breakdown and weight loss will only happen if your energy expenditure is higher than your energy intake on a consistent basis.

That means that your exercise, training, and normal body functions need to use up or burn more calories than you take in through food. Only then may you burn fat and start getting that lean muscle mass.

The metabolic functions that target the storage of fat cells are called thermogenesis and lipolysis, and we’ll take a look at how this caffeine-free fat burner helps your body lose fat.

Suitable For Men & Women

Burn Lab Pro Far Burner CTA supplement product

Burn Lab Pro

Overall Score 3.7

1. Thermogenesis

Opti-Nutra is a UK-based company, and they claim to have created a stimulant-free thermogenic supplement.

Essentially, this process involves slightly raising your body temperature resulting in more calories burned, which can lead to fat loss [1].

Check this video out to know more about thermogenesis.


2. Lipolysis

Lipolysis is generally triggered through fasting and exercise. When your dietary energy doesn’t support all your energy needs for physical activity, then your metabolism will first target glycogen, and then fat [2].

9 Key Benefits

The Burn Lab Pro Fat Burner is a high-quality fat-burning supplement that helps you lose weight without losing muscle growth.*

Besides the powerful weight loss formula, this supplement is beneficial for your health.

The regular use of this supplement can result in some of these benefits:

  • Blood sugar levels are stabilized
  • Thyroid function is improved
  • Improves the body's hormonal imbalance
  • Prevents fats from being stored in cells
  • Aids in the regulation of appetite
  • Increases the amount of energy you have
  • Fat oxidation and breakdown are maximized
  • Weight loss is maximized
  • Increases muscle mass

What Are The Ingredients?

1. HMB (HMB ß-Hydroxy ß-Methylbutyrate)

Supplement facts of Burn Lab Pro

This abbreviation stands for ß-Hydroxy ß-Methyl butyrate formula, and you only need to remember it as HMB, often found among the ingredients in similar products.

This is the headline active ingredient, and the claim is that it can trigger the same fat loss processes as fasting [3].

Burn Lab Pro uses the calcium form of HMB (HMB-Ca), which is known to have higher absorption. However, it seems that recent studies confirm that the free acid form of HMB (HMB-FA) has better bioavailability and absorption than HMB-Ca [4].

"HMB is a naturally occurring byproduct of leucine breakdown. It behaves similarly to leucine in the body; both independently increase muscle protein synthesis and inhibit muscle protein breakdown, though leucine is better at causing protein synthesis, and HMB is better at inhibiting protein breakdown and also mitigating muscle damage in response to training."

- Greg Nuckols, Exercise & Sports Scientist

2. Coleus Forskohlii

Coleus Forskohlii plant and extract

The ForsLean® or coleus forskohlii root extract has been added to a thermogenic fat burner claiming that this ingredient triggers thermogenesis and helps regulate metabolic hormones [5].

One study conducted in 2015 showed that when combined with a calorie deficit, coleus forskohlii or ForsLean can help regulate metabolic rates, which is why it is commonly used in supplements.

3. Cayenne Pepper Extract

A close up shot of cayenne pepper extract

Now, before you think that Capsimax cayenne pepper, like any other chili pepper, will burn away your taste buds and cause all sorts of stomach upset, this extract will do no such thing [6].

Cayenne pepper extract in all its nutrient forms has long been known to work well as a fat burner and an appetite suppressant, but a recent detailed study was able to draw a scientific link with its ability to burn fat.

That's why you'll find this chili pepper extract as an ingredient in some of the best weight loss supplements.

4. Black Pepper Extract

Black pepper extract on top of black pepper corns

Similar to cayenne, BioPerine black pepper is known to stimulate thermogenesis, but this ingredient has a little weight-loss bonus attached to it.

One study has shown that BioPerine black pepper extract can inhibit a process that leads to excess energy being stored as fat [7].

Combined with all the other ingredients, this means that thanks to the BioPerine ingredient, you’ll be more likely to lose weight and keep it off at the same time.*

5. NutriGenesis® GTF Chromium

This trace mineral, presented as Glucose Tolerance Factor (GTF), is known to enhance insulin activity, promoting significant fat loss. It contains whole-food cofactors that can boost its absorption and bioavailability for faster results.

Research shows that it may improve insulin sensitivity, which can help regulate appetite, stabilize energy, and improve endurance to cause fat loss. It is also proven that among different forms of chromium, GTF performs the best in reducing insulin resistance [8].

Check out our list of other reviews:

  • Does not contain any synthetic additives or artificial colors
  • Ingredients can promote thermogenesis resulting in increased fat-burning
  • Quick results, with proper diet and exercise, seen in as little as two weeks*
  • Some users may find it pricey

Burn Lab Pro Side Effects

man picking up a bottle of supplements

All the ingredients, based on 1st hand experience, are generally classified as safe to take. Unless you have a known allergy, there shouldn't be any reason for this product's concern and potential side effects.

Based on reading hundreds of reviews, my clients' experience, and my test results, one side effect did show up.

It messed up my bowel movement and caused an upset stomach. This experience was evident during the first few days of trying it out.

If you're considering taking this fat loss supplement, I suggest taking it at a lower dose for a few days and just avoiding taking it whilst fasting.

Suitable For Men & Women

Burn Lab Pro Far Burner CTA supplement product

Burn Lab Pro

Overall Score 3.7

Who is Burn Lab Pro Right For?

Burn Lab Pro is a weight loss supplement that targets a fat loss plateau by promoting the reduction of stored body fat and the development of lean muscle. It is recommended to take it on an empty stomach for optimal results in burning calories and boosting energy levels. By creating a calorie deficit and addressing insulin resistance, this supplement aids in the breakdown of fatty acids and prevents the formation of new fat cells.

Burn Lab Pro is right for athletes and people who are willing to put in the most effort. It is a program that is designed to improve your body composition in a real and apparent way.

If you're not driven to work hard in the gym and eat well, this product is probably not for you. Burn Lab Pro is not a game for the faint-hearted.

But, if you're the type of person who is prepared to put in the effort and use Burn Lab Pro, you'll get the same outcomes that so many others have.*

When Should You Take It?

You should take two capsules of Burn Lab Pro 15 minutes before you start training for maximum benefits. Based on 1st hand experience, this allows your stomach to absorb the active ingredients for them to start kicking into action in time.

The idea behind combining it with a training session is that your body will trigger normal fat-burning processes through physical activity, and Burn Lab Pro burns more calories that will give your moves that little bit of an extra boost.

How Long Does it Take to See Results?

It takes 10 to 14 days to see first results, if you take the recommended dosage combined with a proper diet and exercise routine.*

In general, you'll see effects after two weeks, with fat loss steadily increasing after that. It may take an extra week or two for you to detect changes on the scale, but you should notice a significant transformation after a few months of use.*

Where To Buy Burn Lab Pro?


You can buy Burn Lab Pro from the company website. While Amazon has plenty of offers, you won’t get a better bulk offer per bottle than directly from Opti-Nutra.

It’s also the only way you can really guarantee you’ll receive the real product. There are so many counterfeit products out there, and when it comes to something that you put in your body, there’s no way you should take any risks. Sometimes, you might receive the real thing, but it's already expired.

Burn Lab Pro Pricing & Guarantee

Burn Lab Pro is, without a question, the most advanced fat burning supplement on the current market. It has everything you'd want: it is safe, made with tested ingredients, and has a great reputation.

There are numerous purchasing options available on the official website:

  • $59.00 for one month's supply
  • $118 for a two-month supply
  • $177 for a four-month supply

Your first fat burners purchase comes with a 30-day money-back guarantee, regardless of what you buy. If you don't see any results, you'll get a complete return of your money.

Fat Burner Alternatives

Finding the ideal fat-burning solution can be challenging, so we researched and put Burn Lab Pro through its paces against three other well-known products with similar fat-burning benefits.


PhenQ CTA supplement product

Our PhenQ review indicates that this is a leading weight loss supplement utilizing clinically-proven ingredients to help people achieve their weight loss goals.*

Rather than focusing on one type of fat burning, PhenQ takes a holistic approach to support users in five ways: inhibiting new fatty deposits, suppressing appetite, boosting energy, reducing stored fat, and increasing focus.

Burn Lab Pro uses HMB and Coleus Forskohlii for fat burning and thermogenesis, and PhenQ uses caffeine to boost metabolism, L-carnitine to increase energy, and nopal for appetite suppression.

After several weeks of use alongside our carefully crafted diet and exercise routine, the measurement results in our test group reflected a noticeable reduction in body fat percentage.*

Purchasing PhenQ from the official website ensures you get a genuine product. Order direct also avails you of their 60-day, money-back guarantee, and they throw in free bottles when you place a bulk order.


LeanBean supplement product

Experts have shared that LeanBean is a vegan-friendly and all-natural fat burner specifically tailored to meet the unique needs of women.

The formula includes thermogenic ingredients like green coffee beans, turmeric, and Glucomannan for hunger control and B vitamins to reduce fatigue.

The dosing of LeanBean is higher than Burn Lab Pro at six pills daily versus three.

Our volunteer group felt the dosing for LeanBean was too demanding, yet it yielded effective results according to our testing results.*

LeanBean is a good value for a fat burner, and ordering through the official website provides peace of mind as you know your purchase will be a genuine product. Additionally, they offer a 90-day money-back guarantee if you are unsatisfied.

Plus, you’ll get discounts for bulk purchases, and their 4-month “Ultimate Bundle” includes a free workout e-book.

Instant Knockout

Instant Knockout Cut CTA supplement product

Instant Knockout Cut, is an increasingly popular fat burner for enhancing metabolism and boosting thermogenesis.

Like Burn Lab Pro, Instant Knockout is vegan, using a vegetable cellulose capsule, compared to Burn Lab Pro’s pullulan (starch) capsule.

A higher dose of caffeine can cause adverse side effects. A handful of users in our test group reported some bothersome effects, while others had no issues and appreciated the extra energy hit throughout the day.

Instant Knockout also contains cayenne to boost thermogenesis and Glucomannan to reduce appetite, and because it initially targeted bodybuilders and high-level athletes, hefty amounts of each ingredient.

Make sure to purchase Instant Knockout from the official website, where you’ll find bundle options tailored to fit any goal, complimentary training and nutrition e-guides, and free shipping on select purchases.

Other User Testimonials

"I love the burn XT. I've already gone through one bottle of it."

-Eric J. Simila, United States


"It was not a great product."

- Jeanette Guziolek, United States



"I dont feel energetic after taking and even with dieting I didn't see much change."

- Amber, United States


"I followed the instructions but still got the jitters. I like the nighttime supplement for sleep but doubt it's effectiveness in burning fat."
- Amber N. Manley Weaver, United States 


burn lab pro faq

Does Burn Lab Pro fat burner work?

Yes, Burn Lab Pro fat burner works, and based on my own experience and client feedback, it has proven to be very effective.* With only natural ingredients and no dodgy chemical crap(being non GMO, gluten-free and stimulant-free), it’s also a perfectly safe option.

Also, it means you need not worry about taking it at night since you won't end up with sleeplessness. That way, you feel more refreshed in the morning, ready to tackle your goal of losing weight.

Can you take Burn Lab Pro Fat Burner without exercising?

You can take Burn Lab Pro Fat Burner without exercising, but you might not experience the same weight loss effect, if at all. Like all fat burners, this product is designed to be used in conjunction with a healthy diet and exercise plan.

Is it okay to take Burn Lab Pro Fat Burner with caffeine?

It's okay to take Burn Lab Pro fat burner with caffeine. Since it's a caffeine-free product, you don't need to worry about the jitters. Plus, caffeine is a natural energy booster, appetite suppressant, and fat burner, so the two actually complement each other.

Is it vegan friendly?

Yes, Burn Lab Pro Fat Burner is a vegan-friendly fat burner, according to the ingredient list. The product has a completely plant-based formula, non-GMO, free of any synthetic additives, soy-free, caffeine-free, and gluten-free. This is great news for those looking for 100% natural products and gluten-free, fat-burning supplements.

What's the recommended fat burning dose?

The recommended fat burning dose of Burn Lab Pro fat burner is two capsules per day. You should take it 15 to 30 minutes before your fasted training.

Can I use it with other supplements?

You can certainly use Burn Lab Pro fat burner with other supplements. For better performance and muscle growth, you can try combining it with other products from the same brand, such as Burn Lab's pre-workout fat-burning supplement. The ingredients of these supplements complement each other well.

Here are some popular​ fat burners you can combine with other supplements:

Is Burn Lab Pro Worth Buying?

Burn Lab Pro offers advanced fat loss support through their range of fat burning supplements, which are designed to help individuals maintain muscle mass while reducing calorie intake, promoting the burning of calories and preventing fat storage.

Based on all the research I've done, along with many hours of carefully browsing through pros and cons, reading online review comments, and some personal experience, I have to say, based on 1st hand experience, that ​Burn Lab Pro Fat Burner is a decent product.

However, I'm on the fence about whether it is one of the best fat burners, as it did cause a few digestive issues when I tried it out. One best fat burner that, by far, hasn't disappointed me nor caused any adverse reactions is PhenQ.

As long as you use the PhenQ fat burner alongside a healthy diet, some intermittent fasting, and continue to push it in the gym, this product can work in conjunction with your body to shed excess weight.* This weight loss supplement, based on 1st hand experience, is designed to help you burn fat cells the right way.

Other users have also found it effective for fat loss.* The images here speak for themselves:

Taylah results PhenQ
Nicola Before After v2

We Recommend This Instead


PhenQ CTA supplement product
Overall Score 5.0
  • Suppresses your appetite
  • Blocks body fat production to stop weight gain
  • Improves your mood and energy levels
  • High-quality, all-natural formula
  • Get the BEST PRICE until the end of September
  • Can be only purchased through the company website

* individual results may vary

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4 thoughts on “Burn Lab Pro Review (2023 Upd.) Does This Fat Burner Work?

  1. I’ve had a similar experience with this product, too. Even if you ate something before taking it, it still unsettled your stomach, made you feel sick and made you feel like you were about to vomit. According to the instructions, start with one capsule. I attempted to increase to the required two twice a day but felt worse and dizzy as if I were lying down and not exercising.

    1. Thanks for taking the time to share your experience, Thomas. I’m sorry to hear that you had a negative reaction to Burn Lab Pro. I guess we’ve all had some unique side effects from this. Like all supplements, it works in one body and it does not with others.

  2. So far, I’m pleased with the outcomes. I went from Burn XT to Burn Pro series, and it appears like I’m still progressing. Feel more slender. It effectively suppresses my appetite. I haven’t felt sick at all. It is a lot of tablets to swallow, but it isn’t a big deal.

  3. I appreciated the Burn Lab Pro review’s focus on preserving muscle while shedding fat. Its additional benefits are worth consideration.

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