5 Best Thermogenic Pre Workouts for Fat Loss (2024 Upd.)

Supplements Considered 20
Supplements
Considered
Hours of Research 67
Hours
of Research
Reviews Examined 38
Reviews
Examined
Experts Interviewed 12
Experts
Interviewed
Benedict Ang, CPT, PN1-NC
Published by Benedict Ang, CPT, PN1-NC | Staff Writer & Senior Coach
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.

Forget those sketchy pre-workout pills you see in ads. I'm not about that. Instead, I'm here to introduce fat-burning pre-workout supplements that complement a healthy diet and exercise routine. No magic pills here – effort and commitment are key.

Together with my team, we've spent months researching and testing top-rated thermogenic pre-workouts. We've sifted through countless customer reviews, consulted with dietitians on ingredients, and personally tested them.

Now, let's dive into the best thermogenic pre-workout products that truly made the mark.

The Best Thermogenic Pre Workouts for Fat Loss

Editor's Choice
Transparent Labs PreSeries LEAN Pre-Workout
Transparent Labs
Rated 4.9/5
Click For Best Price
2nd Best Choice
Pre Lab Pro
Pre Lab Pro
Rated 4.8/5
Click For Best Price
3rd Best Choice
Nitrosurge Shred Pre-Workout
Nitrosurge Shred
Rated 4.6/5
Click For Best Price

Our Top Thermogenic Pre-Workout Products (June 2024)

1 - Transparent Labs PreSeries LEAN Pre-Workout (Best Overall and Natural Formula)

Rated 4.9/5
4.9
Ingredients
4.7
Texture
5.0
Flavor
5.0
User Ratings
4.9
Ingredient Quality
4.8
Product Effectiveness
Transparent Labs PreSeries LEAN Pre-Workout
  • Price per serving : $1.67
  • Key ingredients : Citrulline Malate, Beta-Alanine, BCAA, Caffeine
  • All flavors : Strawberry Lemonade, Sour Grape, Fruit Punch, Cherry Splash, Blue Raspberry, Green Apple, Orange, Tropical Punch
  • Third-party tested : Yes

Pros and Cons

Pros

  • BCAAs support increased strength and muscle mass growth
  • A strong dose of caffeine
  • Many users say the flavors are quite nice
  • Based on average from reviews, it starts working within 15 minutes
  • Free from artificial sweeteners, colors, and preservatives, perfect for people with diabetes

Cons

  • Not the cheapest option unless you bulk buy

Who is it for?

Who is it for?

  • Athletes looking for a boost in strength and muscle recovery
  • People with diabetes seeking safe supplements

Who is it not for?

  • Individuals looking for the cheapest option

Final Verdict

Transparent Labs offers a well-rounded, nutrient-rich supplement that enhances both energy and focus. It's ideal for those committed to an intense workout regimen and who prefer natural ingredients.

I first tried Transparent Labs Pre-series Lean Preworkout on a gym buddy's tip – no ads, just real talk. It supercharged my workouts with energy and focus. What's cool is its detailed nutrition info, offering a nutrient-rich mix that's not just energizing but nourishing.

It's packed with scientifically proven ingredients for energy and thermogenesis. Plus, it's a hit among users for boosting mental clarity, thanks to caffeine.

Diabetics will appreciate its lack of artificial stuff, keeping blood sugar in check. And with added BCAAs, it's great for energy and muscle recovery. A real gym game-changer!

You can watch this video review to learn more about this thermogenic pre-workout performance supplement.

youtube

Get 10% off using coupon code:  TOTALSHAPE

2 - Pre Lab Pro (Best Vegan-Friendly)

Rated 4.8/5
4.8
Ingredients
4.6
Texture
4.9
Flavor
4.8
User Ratings
4.8
Ingredient Quality
4.7
Product Effectiveness
Pre Lab Pro
  • Price per serving : $2.95
  • Key ingredients : Beetroot Powder, Setria® Glutathione, L-Citrulline, Natural Caffeine, L-Theanine, L-Tyrosine, Vitamin D3
  • All flavors : Natural Berry
  • Third-party tested : Yes

Pros and Cons

Pros

  • Claims to raise nitric oxide levels for better blood flow
  • Suitable for daily use to support performance athletes
  • A good dose of creatine and L-citrulline
  • Suitable for vegans due to plant-based ingredients

Cons

  • Swallowing 4 pills can be a struggle

Who is it for?

Who is it for?

  • Vegans seeking plant-based ingredients
  • Athletes needing consistent energy and performance support

Who is it not for?

  • Those who prefer not to take multiple capsules at a time

Final Verdict

Pre Lab Pro stands out for its vegan-friendly formula and effectiveness in boosting workout performance. It's perfect for daily use but may be cumbersome due to its multiple capsule requirement.

Out of all the thermogenic pre-workouts we tested, this one really stood out. Every capsule consistently amped up our energy and thermogenic response. I especially liked how it boosted my workouts without the jittery side effects.

Kudos to the creators for transparency in their ingredient list – it's packed with creatine, L-citrulline, and electrolytes. It works by revving up your metabolism, tapping into fat for energy.

Both our team and a bunch of happy users give it a big thumbs up for its simplicity and effectiveness.

The only catch? You'll need to down 4 capsules – I split mine, taking 2 at home and 2 pre-gym.

3 - Nitrosurge Shred Pre-Workout (Cheapest Option)

Rated 4.6/5
4.7
Ingredients
4.6
Texture
4.6
Flavor
4.6
User Ratings
4.7
Ingredient Quality
4.6
Product Effectiveness
Nitrosurge Shred Pre-Workout
  • Price per serving : $1.17
  • Key ingredients : Beta-Alanine, L-Theanine, Caffeine
  • All flavors : Cherry Limeade, Watermelon, Fruit Punch, Black Cherry, Blueberry Lemonade
  • Third-party tested : Not specified

Pros and Cons

Pros

  • Combination of L-Theanine and caffeine promote fat loss
  • Many positive reports of better pumps
  • Claims to give you more focus
  • The flavors are quite nice tasting

Cons

  • Some extra minerals would be great

Who is it for?

Who is it for?

  • Those looking for enhanced mental focus and energy
  • Budget-conscious consumers

Who is it not for?

  • Users who prefer a more comprehensive mineral profile

Final Verdict

Nitrosurge Shred offers an affordable option with effective fat-burning capabilities. It's particularly noted for its ability to enhance endurance and focus during workouts.

When I tried my first dose of Nitrosurge Shred, I remember experiencing this surge of energy and thermogenic effects.

It gave me an extra kick in my endurance that I hadn't experienced since I was a teenager.

Many people emphasize mental focus in most of the review comments we came across, so you should feel that your workouts are more straightforward.

While the aim is to keep this thermogenic pre-workout simple, I would have liked to see some more minerals, especially zinc.

This can help your body produce more testosterone, so it might be something you need to source from other supplements.

4 - Cellucor C4 Ripped Pre Workout (Best Blood Sugar Balancing)

Rated 4.5/5
4.6
Ingredients
4.1
Texture
4.6
Flavor
4.6
User Ratings
4.5
Ingredient Quality
4.6
Product Effectiveness
Cellucor C4 Ripped Pre Workout
  • Price per serving : $1.33
  • Key ingredients : Caffeine, CarnoSyn® Beta-Alanine, Capsimax® Cayenne, BetaPower® Betaine
  • All flavors : Arctic Snow Cone, Fruit Punch
  • Third-party tested : Yes

Pros and Cons

Pros

  • A good dose of caffeine for thermogenic effect and mental boost
  • Many people say the flavors are refreshing
  • Comes with a 30-day money-back guarantee
  • Contains green coffee bean extract which can balance blood sugar levels

Cons

  • Exact amounts of ingredients are kept proprietary

Who is it for?

Who is it for?

  • Individuals seeking a thermogenic boost along with a mental uplift
  • Those needing to manage blood sugar levels

Who is it not for?

  • People sensitive to proprietary blends

Final Verdict

Cellucor C4 Ripped is beneficial for those looking to balance blood sugar levels while getting a significant energy boost. Its effectiveness comes despite the lack of detailed ingredient transparency.

I've tried various Cellucor supplements, and while they don't all hit the mark, this pre-workout did show noticeable effects on thermogenesis and muscle pumps.

It includes green coffee bean extract, known to slow carb digestion and balance blood sugar – a big plus in my book.

Though it's not the top weight loss supplement due to its proprietary blends, it's still a solid choice for fat-burning. Plus, the money-back guarantee makes it worth a shot.

5 - Battle Ready Fuel Pre-Workout

Rated 4.4/5
4.5
Ingredients
4.1
Texture
4.5
Flavor
4.4
User Ratings
4.5
Ingredient Quality
4.4
Product Effectiveness
Battle Ready Fuel Pre Workout

Pros and Cons

Pros

  • Claims to help your body burn an extra 278 calories a day
  • Good blend of proven ingredients that help burn fat tissue
  • Many positive comments about better muscle pumps
  • Only requires one capsule to be taken once a day

Cons

  • Seems to be quite slow acting

Who is it for?

Who is it for?

  • Those looking to maximize calorie burn
  • Users interested in major muscle pump improvements

Who is it not for?

  • People who prefer supplements with creatine

Final Verdict

Battle Ready Fuel is potent for its thermogenic effect and claims to enhance daily calorie burning. However, its slow action and lack of creatine may deter some users.

At first, I was skeptical about this pre-workout supplement, thinking its flashy branding overshadowed its research. But, testing it proved me wrong.

The thermogenic effects were real, not just hype. I experienced a significant boost in energy, focus, and metabolic heat.

They've packed it with fat-burning ingredients like caffeine and black pepper extract, really focusing on thermogenesis.

The downside? It lacks creatine, a personal favorite in my supplements.

While unconfirmed, the company claims it can burn an extra 278 calories daily, which if true, is quite impressive.

How We Tested the Products

Our selection process was thorough and meticulous.

Ingredient Profile and Quality

We rigorously analyzed each ingredient for effectiveness and safety, ensuring they were scientifically proven to enhance thermogenesis and fat loss. This step was crucial in understanding the synergy and overall effectiveness of the product.

Dosage and Concentration of Key Ingredients

Our focus was on ensuring the dosages of key ingredients were within scientifically recommended levels. This balance was essential for efficacy without risking excessive amounts that could lead to adverse effects.

Potential Side Effects and Safety

Safety was paramount. We delved into medical literature and user experiences to understand potential side effects, prioritizing products that offered benefits without health compromises, especially for those with specific sensitivities.

Brand Reputation and User Reviews

We evaluated brand reputation and user reviews, looking for consistent positive feedback and a proven track record. This approach helped us identify products that were not just popular but trustworthy and effective.

What Ingredients Should You Look Out For In A Thermogenic Pre-Workout Supplement?

Top view of supplements with ingredients

The ingredients you should look for in a thermogenic pre-workout are caffeine, green tea extract, capsicum/cayenne, and L-carnitine.

1. Caffeine

Essential in thermogenic fat burners, caffeine is a top natural fat burner, validated by clinical trials.

In the short term, caffeine can boost the metabolic rate and increase fat burning, but after a while, people become tolerant to the effects, and it stops working.

- Kris Gunnars, Nutrition Researcher

Based on my experience, the key to maintaining its benefits is monitoring its intake.

2. Green Tea Extract

Beyond its caffeine content, green tea extract is rich in antioxidants, aiding fat processing and detoxification as reported by Livestrong [1]. This ingredient is a staple in the best thermogenic pre-workouts for its dual role in enhancing fat loss and overall well-being.

3. Capsicum/Cayenne

Used in extract form in pre-workouts, capsicum, or cayenne, aids in suppressing hunger and mobilizing stubborn fat reserves. As a fitness coach, I've seen its effectiveness in helping clients target difficult fat areas.

4. L-Carnitine

Commonly found in pre-workouts, L-Carnitine plays a crucial role in converting stored fat into fatty acids, which are then used by muscles. This process is vital for optimal workout performance and is a component I often recommend for enhanced exercise efficiency.

How Do Thermogenic Pre-Workouts Work?

Holding a dumbbell and a tumbler with pre workout drink

Thermogenic pre-workout supplements work by raising your core body temperature, thereby increasing energy expenditure and aiding fat loss. This process is more complex than it seems, involving intricate physiological reactions.

In my experience as a fitness coach, I've seen how combining these supplements with regular exercise can significantly enhance fat oxidation. This is supported by research published in the Journal of the International Society of Sports Nutrition [2].

Adopting a routine of healthy eating, exercise, and supplement intake creates a beneficial cycle. A calorie-deficit diet and consistent exercise lead to fat loss, and adding thermogenic boosts energy levels, further enhancing muscle performance.

This approach has proven effective for many of my clients, demonstrating the power of combining diet, exercise, and the right supplements.

The word “thermogenic” literally means heat-producing. When your body burns calories, it generates more heat, so the supplements that boost metabolism or fat burning are considered thermogenic.

- Erica Julson, Registered Dietician

Do Thermogenic Pre-Workouts Have Side Effects?

Man having side effects while jogging outdoors

Yes, thermogenic pre-workouts can have mild side effects, that are tolerable for most people, especially the FDA-approved, natural supplements that we've selected for their obesity-fighting properties.

However, some may experience side effects, particularly when exceeding recommended doses or combining with other thermogenic supplements.

  1. Nausea: Potent thermogenic pre-workouts can sometimes cause nausea or dehydration. If you experience this, lower the dosage or switch products.
  2. Cramps: Overdosing can lead to cramps, a side effect I've observed in clients who take more than the advised amount. Beginners should start with lower doses to avoid discomfort, including cramps and constipation.
  3. Jitters: Excessive caffeine, often found in these supplements, can cause jitters and heart palpitations, especially if combined with regular coffee consumption.
  4. Insomnia: Caffeine can also disrupt sleep patterns, leading to insomnia. According to Sleep Doctor, this is particularly true if taken late in the day, as it can interfere with your Circadian rhythm and increase stress and anxiety levels [3].

To minimize these risks, adhere to FDA guidelines and consider consulting a nutritionist or medical professional. In my coaching experience, careful adherence to dosages and awareness of individual tolerance levels have been key in helping clients use these supplements effectively and safely.

When's The Best Time To Take The Best Thermogenic Pre-Workouts?

Drinking thermogenic pre-workout

The best time to take thermogenic pre-workouts is 20 to 30 minutes before starting your training. From my experience as a fitness coach, taking them half an hour before your warm-up allows your metabolism to adequately respond.

It's beneficial to track how long it takes to feel their effects, like increased energy and focus, and adjust timing accordingly. On non-workout days, taking a thermogenic pre-workout 30 minutes after waking can help maintain a boosted metabolism.

For those sensitive to caffeine, consider afternoon workouts or opt for stimulant-free options to avoid sleep disruption. This approach has helped many of my clients optimize their use of thermogenic pre-workouts effectively.

FAQs

Do Thermogenics Really Work?

Thermogenics work, as proven by countless clinical trials and scientific studies that back up their effects. With healthy eating and training, thermogenic pre-workouts should help you lose fat and build lean muscle mass.

Do Thermogenics Give You Energy?

Yes, thermogenics give you energy by processing stored body fat and releasing it as energy. Some of that is used for metabolic processes, but you’ll also notice a difference during training.

Can a Pre-workout Help You Lose Weight?

Yes, thermogenic pre-workout supplements can help you lose weight with fat-burning and energy-boosting ingredients. The increased energy will allow you to work harder and help you burn more, therefore leading to weight loss.

Should I Take Cycles With My Thermogenic Pre-workout?

Yes, you should take cycles with your thermogenic pre-workout performance supplement to give your body some time away from stimulants like caffeine. This prevents your body from building up a tolerance to these stimulants, making the thermogenic effect less effective.

Generally, cycling thermogenic pre-workouts and fat burners for 6 to 8 weeks after 8 to 10 weeks of taking them is ideal. Others also recommended to stop taking thermogenic pre-workouts when you can no longer feel that "tingly buzz."

However, you can also alternate a stimulant-based and non-stimulant based pre-workout to get the same results.

Are Thermogenic Pre-workouts Dangerous?

Thermogenic pre-workouts aren't dangerous, but they can be when taken beyond the recommended dosage. That said, make sure to follow the instructions on the label to prevent any adverse reactions and ensure proper weight control.

Is Taking More Thermogenics Better?

No, taking more thermogenic supplements is not better. In fact, it may actually be more dangerous. Always follow the recommended dosage and never attempt to take double the recommended servings of various products to get more benefits to avoid becoming overweight.

After thoroughly testing various thermogenic pre-workouts, my team and I unanimously agree that Transparent Labs stands out as the best.

Our hands-on experience with this product, combined with extensive research and user reviews, confirmed its superior performance.

Its balanced blend of nutrients not only boosted our energy but also enhanced our workout efficiency.

Transparent Labs' commitment to quality and transparency in ingredients truly sets it apart, making it our top recommendation for anyone seeking an effective thermogenic pre-workout.

Our #1 ​Best Thermogenic Pre Workout

Transparent Labs PreSeries LEAN Pre-Workout (Best Overall and Natural Formula)

Transparent Labs PreSeries LEAN Pre-Workout

Rated With Total Shape's Scoring System

4.9
Ingredients
4.7
Texture
5.0
Flavor
5.0
User Ratings
4.9
Ingredient Quality
4.8
Product Effectiveness
Pros
  • BCAAs support increased strength and muscle mass growth
  • A strong dose of caffeine
  • Many users say the flavors are quite nice
  • Based on average from reviews, it starts working within 15 minutes
  • Free from artificial sweeteners, colors, and preservatives, perfect for people with diabetes
  • Get 10% off using code: TOTALSHAPE
Cons
  • Not the cheapest option unless you bulk buy
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About The Author

Benedict Ang, CPT, PN1-NC
Staff Writer & Senior Coach
Benedict Ang, CPT, PN1-NC is an ex-National Soccer player turned MMA and Kickboxing champion, with ACE CPT and PN1-NC certifications. His advice is rooted in education and experience, ensuring that readers receive scientific and battle-tested insights. His mission is to empower his clients and readers to realize their potential and become the best versions of themselves.
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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Our ingredients score is based on 3 factors including: transparency, blend disclosure, and dosage accuracy. We conduct third-party lab verification of ingredients. The score is an objective measure of the lab test results compared to the product label. For more information see our ingredients score explanation here.
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Our scoring system is the result of objective testing data and subjective expert analysis by a team of fitness coaches and medical experts. Our scoring factors are weighted based on importance. For more information, see our product review guidelines.