Burn Lab Pro Review (2024 Upd.) Does This Fat Burner Work? 

Lisa Lorraine Taylor, BSc, CPT
Published by Lisa Lorraine Taylor, BSc, CPT | Staff Writer
Last updated: June 19, 2024
FACT CHECKED by Dr. Kristy Dayanan, BS, MD
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 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 it's the old name but the same fat-burning supplement.

What Is Burn Lab Pro?

Burn Lab Pro Close up product

Burn Lab Pro 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.

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.

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

How Does Burn Lab Pro Work?

Burn Lab Pro works by triggering thermogenesis and lipolysis, which can start the fat-burning process in your body [1].

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.

Let's take a quick look at how thermogenesis and lipolysis work.

Suitable For Men & Women

Burn Lab Pro Far Burner CTA supplement product

Burn Lab Pro

Rated With Total Shape's Scoring System


1. Thermogenesis

Essentially, this process involves slightly raising your body temperature resulting in more calories burned, which can lead to fat loss [2].

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 [3].

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:

  • Stabilized blood sugar levels
  • Improved thyroid function
  • Improved hormonal balance
  • Reduced fat storage
  • Regulated appetite
  • Increased energy levels
  • Maximized fat oxidation and breakdown
  • Maximized weight loss
  • Increased muscle mass

What Are The Ingredients?

Here are the five ingredients that go into Burn Lab Pro.

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 (backed by a study from the National Library of Medicine) is that it can trigger the same fat-loss processes as fasting [4].

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 [5].

"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 this thermogenic fat burner to trigger thermogenesis and regulate metabolic hormones.

One study 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 [6].

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.

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 [7].

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

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 [8].

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 [9].

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

A nurse writing Burn Lab Pro Side Effects

All the ingredients in Burn Lab Pro 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

Rated With Total Shape's Scoring System


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 my 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, which will give your moves that little bit of an extra boost.

How Long Does it Take to See Results?

It takes 10–14 days to see your first results from Burn Lab Pro, provided 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 Can You Buy Burn Lab Pro?

Athletes buying supplements online.

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, no discount is worth a fake product.

Burn Lab Pro Pricing & Guarantee

At the time of writing this article, Burn Lab Pro offers the following bundles on their official website:

  • One-month supply: $35.40
  • Two-month supply: $70.8
  • 0Four-month supply (with one box free): $106.20

Your first fat burner 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 Product

Our research on PhenQ indicates that this is a leading weight loss supplement that uses 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. Ordering directly also avails you of their 60-day, money-back guarantee, and they throw in free bottles when you place a bulk order.



PhenGold stands out as a comprehensive, vegan-friendly fat burner tailored for both men and women. It combines natural metabolism boosters and mood enhancers without relying heavily on stimulants, making it suitable for daily use.

While it recommends a daily intake of three pills, users find this manageable and effective. Our volunteer group's experience with PhenGold was notably positive, finding the three-pill daily regimen both practical and effective for weight management. This aligns with PhenGold's aim to support metabolism and reduce cravings without overreliance on stimulants.

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.

User Testimonials

Here's what Burn Lab Pro users have to say:

"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. Based on my own experience and client feedback, it has proven to be very effective.* With only natural ingredients and no dodgy chemicals, it’s also a perfectly safe option.

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.

Our Verdict: Is Burn Lab Pro Worth Buying?

Based on our extensive research at Total Shape, I have to say that ​Burn Lab Pro Fat Burner is a decent product.

However, I'm on the fence about whether it's one of the best fat burners, as it did cause a few digestive issues when I tried it out.

That said, the 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.*

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 Product

Rated With Total Shape's Scoring System

  • 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 June
  • Can be only purchased through the company website

* individual results may vary

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About The Author

Lisa Lorraine Taylor, BSc, CPT
Staff Writer
Lisa Lorraine Taylor, BSc, CPT holds a BSc degree in Holistic Nutrition from Clayton College of Natural Health and is the owner of Taylor Made Fitness. Her philosophy centers on cutting through the hype and misinformation surrounding dietary supplements, focusing instead on practical, science-backed strategies for health and weight loss.
Learn more about our editorial policy
Dr. Kristy June Dayanan, BS, MD is an author with a BS degree from University of the Philippines and an MD from University of Perpetual Help System. Her ability to simplify medical science complexities and dietary supplement jargon for the average reader makes her a valued medical fact checker and reviewer.
Learn more about our editorial policy
Dr. Harshi Dhingra, MBBS, MD is a published peer-reviewed author and renowned physician from India with over a decade of experience. With her MBBS from Bharati Vidyapeeth and an MD from Rajiv Gandhi University, she actively ensures the accuracy of online dietary supplement and medical information by reviewing and fact-checking health publications.
Learn more about our editorial policy

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3 thoughts on “Burn Lab Pro Review (2024 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.

  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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