Best Thermogenic Pre-Workout For 2020

In a hurry? Check out our top choice:

PreSeries LEAN
PreSeries LEAN was developed for a single purpose - to be the most exceptional "cutting" pre-workout supplement available for men and women alike.
  • Exceptional "cutting" pre-workout
  • Clinically effective dosages
  • No dyes/ additives

Just when you thought the fitness supplement industry couldn’t get any more confusing, a whole new product sub-category emerges onto the scene.

The Thermogenic Pre Workout is a hybrid of the Thermogenic Fat Burner and the Pre Workout.

It is designed to provide performance-enhancing benefits while, at the same time, ramping up your fat burning ability.

In A Hurry? Here our the best thermogenic pre workouts:

am-table__imagePreSeries LEAN
  • Exceptional "cutting" pre-workout
  • Clinically effective dosages
  • No dyes/ additives
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am-table__imageNitroSurge Shred
  • Energy boost
  • Thermogenic effect
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am-table__imageThermo Pre
  • All-natural ingredients
  • Thermogenic effect
  • Enhances training energy
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am-table__imageCellucor C4 Ripped
  • Energy enhancer
  • Thermogenic effect
  • Enhanced training pump
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  • Crash free energy boost
  • More sustained energy
  • Improves focus
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In this article, we answer the questions you need to know to get the best results from a thermogenic pre workout.

What is a Thermogenic Pre-Workout?

A thermogenic fat burner is designed to speed up the metabolism by raising your body temperature.

In doing so, it creates an environment in your body that is conducive to fat burning.
It does this with the aid of natural stimulants such as caffeine, green tea extract, and guarana.

Thermogenic fat burners boost your metabolism 24/7 while also making your workout more productive.

A good thermogenic will also address your appetite.

It will work on the satiety centers in the brain that help to keep your appetite checked.

Can Fat Burners Be Used as Pre workouts for Fat Loss?


Thermogenic Pre Workouts combine the effects of a thermogenic fat burner with those of a pre workout supplement.

They are designed to provide you with more energy, strength and focus for your workout while also speeding up your metabolism during the workout and in the hours after you leave the gym.

According to a study published in the International Journal of Obesity in 2005, thermogenic ingredients can boost fat burning potential by 10-15 percent (1).

Benefits of a Thermogenic Pre Workout

• Boosts metabolism to increase calorie burn 24/7
• Increased energy
• Improved focus
• Appetite suppressant
• Improves your workout performance

Key Ingredients to Look for in a Thermogenic Pre Workout


Caffeine is the world’s most widely consumed stimulant.

Studies have shown that it has the ability to speed up the metabolic rate by 8-11 per cent over a 12-hour period.

It also stimulates the production of adrenaline.

Caffeine also has the ability to boost the level of fatty acids in the blood, making them more readily available for energy (3).

Green Tea Extract

Green Tea Extract is an extract of green tea leaves.

It contains antioxidants mainly in the form of green tea polyphenols and catechins as well as caffeine, all of which are believed to aid fat loss by inducing thermogenesis, stimulating fat oxidation and increasing metabolism (4) (5).

Conjugated Linoleic Acid

Conjugated Linoleic Acid (CLA) is a fatty acid, primarily found in beef and dairy products, that has been shown to promote long-term fat reduction and health management.

Lab and clinical studies have also revealed that CLA promotes muscle tone as well as reducing cholesterol levels and boosting metabolism (6).


Capsaicin, an active ingredient in hot chili, increases core body temperature by boosting adrenaline levels.

It has been shown to increase workout calorie burn while also minimizing the effect of the body’s adaptive response to calorie reduction (7).

Best Time to Take It

For best results, you should take your thermogenic pre workout 30 minutes before your workout.

On no workout days, take it 30 minutes after waking up to produce an all day long metabolic increase.

Thermogenic pre workouts normally come as either a tablet, capsule or powder.

The stimulatory effects of these supplements mean that you shouldn’t take them within 5 hours of going to bed.

Thermogenic pre workouts should be cycled in order to prevent the body from developing a tolerance to the ingredients.

After using them for 8-10 weeks, take a 6-week break before cycling for a further 8-10 weeks.

Are There Any Side Effects?

Thermogenic pre workouts carry two key side effects:

• Dehydration
• Lack of Sleep

Because thermogenics increase the body’s core temperature, the body needs more water in order to maintain its ideal body temp.

For this reason, you should drink more water when supplementing with a thermogenic.

The increased energy produced by the stimulants in thermogenics can affect sleep if taken within 5 hours of going to bed.

Stimulants such as caffeine may produce unwanted effects such as the jitters, headaches and a post-exercise energy crash if taken in large doses.

For this reason, you should not go beyond 400mg of caffeine per dose.

Product Reviews

Transparent Labs PreSeries LEAN

Preseries lean pre workout

PreSeries Lean is a thermogenic fat burner that is designed to maximize your fat burning, provide clean energy, and start the recovery process after training.

With 21 active ingredients clinically dosed, this pre workout was built for results.

However, it does provide a significant fat burning effect, while also noticeably increasing training energy.

The recommended dosage is 1 scoop (16.14g) before training.


  • Fat burner
  • Thyroid support complex
  • Clinically dosed
  • 30 serving supply


  • Higher sticker price
  • No creatine

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NitroSurge Shred

NITROSURGE SHRED Pre Workout Fat Burner Supplement - 30 Servings, Orange Pineapple Flavor 8.5 oz

Nitrosurge Shred is an all natural thermogenic fat burner that is designed to promote energy and power output while working out.

It contains some solid fat burning ingredients including:

  • Caffeine Anhydrous
  • L-Citrulline
  • Acetyl-L-Carnitine
  • Beta-Alanine
  • L-Theanine
  • Hordenine HCI
  • Synephrine HCI
  • BioPerine

Citrulline is an amino acid which enhances endurance by being converted to L-Arginine in order to increase the nitric oxide levels in the body.

This increases the blood supply to muscle cells, increasing the pump effect and boosting endurance.

The Carnitine in Nitrosurge improves training energy and focus while, in conjunction with caffeine anhydrous, also boosting the metabolism.

Bioperine is a black pepper based ingredient that helps with absorption to get the ingredients into your system sooner.

There are a number of side effects associated with the ingredients in Nitrosurge.

Beta-Alanine can produce an itching effect in the hands and face which is known as paresthesia.

Synephrine has been known to cause headaches, dizziness and elevated blood pressure.

The recommended dosage of Nitrosurge is 2 capsules per day.

This provides you with 360 mg of caffeine.

This may cause a jittery reaction in people who are sensitive to stimulants.


• Energy boost
• Thermogenic effect


• Beta-alanine may cause a tickling sensation on the skin
• Citrulline under dosed at 2 grams (should be 6-8 grams per serve)

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Thermo Pre

RAW Synergies Pre Workout Thermogenic Fat Burner Powder for Women and Men, All Natural Energy & Weight Loss Supplement – Focus & Metabolism Booster Drink – No Artificial Sweeteners, Fruit Punch, 24SV

ThermoPre is a 2-in-1 preworkout thermogenic designed for men and women.

It includes no artificial sweeteners, dyes or hyper stimulants. Instead, it contains:

  • Organic Stevia Leaf Extract
  • Citric Acid
  • Sicila
  • Beet Root
  • Ashwagandha
  • Coffea arabica bean
  • Yerba Mate
  • Beta Alanine
  • Acetyl-L-Carnitine

These ingredients provide an effective and safe, yet potent, thermogenic boost to speed up the metabolism.

At the same time, they deliver a sustained, clean flow of workout energy that will not be followed by a stimulant crash.

This product also has a nootropic effect, to focus the mind and provide greater training focus.

The only potential side effects with this product come from the beta-alanine, which may cause itchiness in the hands and feet.


  • All-natural ingredients
  • No fillers
  • Thermogenic effect
  • Enhances training energy
  • Nootropic Benefits


  • Beta-alanine may cause itchiness in the hands and feet

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Cellucor C4 Ripped

Cellucor C4 Ripped Pre Workout Powder, Thermogenic Fat Burner, Energy & Weight Loss Supplement For Men & Women, Cherry Limeade, 30 Servings

Cellucor C4 Ripped is a pre workout that combines proven energy and power boosting ingredients with those that are specific to fat loss.

This is a creatine free pre-workout that delivers a proprietary blend of the following compounds:

  • L-Carnitine
  • Green Coffee Bean Extract
  • Cayenne Fruit Extract
  • Coleus Forksohlii Root Extract

Each serving of Cellucor C4 Ripped also contains 1.6 grams of Beta-Alanine to enhance your training pump, 150 mg of caffeine for energy and 1 gram of Arginine AKG for endurance.

Cellucor C4 Ripped comes as a pre-workout powder.

It should be taken 30-45 minutes before your workout.

The recommendation is to start with one scoop in a glass of water and increase to two scoops once you have gotten used to the product.

Some people have reported a tingly sensation when taking two scoops, so we suggest cutting back to 1.5 scoops per day with water.


  • Energy enhancer
  • Thermogenic effect
  • Enhanced training pump


  • May produce slight tingly sensation
  • Quite expensive

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DeFine8: Watermelon - Fat Burner for Women and Men, Pre-Workout Thermogenic - NEW ADVANCED FORMULA, Appetite Suppressant, Boosts Metabolism & Curbs Sweet Cravings for Weight Loss.

DeFine8 is a powdered thermogenic that delivers a smooth flow of training energy without the crash that comes with heavy stimulant based products.

In addition, it provides you with the equivalent of 25 cups of green tea in each scoop to provide a potent fat burning effect.

DeFine8 is calorie, sugar, and carb free.

Each scoop delivers 80mg of Vitamin B6, 500mg of B12 and a 1545mg proprietary blend made up of the following:

  • Green Tea Extract
  •  Coriander extract
  • Bittermelon extract
  • Caffeine anhydrous
  • Cocoa extract

DeFine8 comes in 10 tasty flavors. It mixes well and absorbs quickly. The caffeine in this product comes from guarana.

This form of caffeine is released more slowly into the body to provide a sustained energy source.

Guarana has also been shown to be an effective appetite suppressant.

DeFine8 should be taken in the morning and again just before your workout.


  • Crash free energy boost
  • More sustained energy
  • Improves focus
  • Appetite suppressant


  • Contains Dandelion extract which may act as a diuretic

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Thermogenic Pre Workouts provide you with the double-whammy of enhanced fat burn and greater workout intensity.

The best product in our round up review is DeFine8 from MuscleWerks.

DeFine 8 does not come loaded down with the stimulant side effects that are common with many thermogenics.

Instead, it delivers a clean, sustained energy flow to power you through your workouts.

At the same time, it will boost your metabolism for a 24 -hour fat burn along with an appetite suppressant effect.

To top it off, you have your choice of 10 delicious flavors.

The thermogenic pre workout market is set to become the next big thing in the supplement industry.

Here are the keys points to remember when negotiating your way through the market:

  • Look for a product that provides clean energy and enhanced metabolism
  • Avoid artificial flavors and fillers
  • Avoid proprietary blends
  • Look for these key ingredients:
    • Caffeine
    • Green Tea Extract
    • Capsaicin
    • Conjugated Linoleic Acid



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