Top 10 Hardcore Fatburner Ranking

You are familiar with pre-workout boosters (not least thanks to us) and know how to get yourself in an "I’m tearing the house down!" mood with a scoop of the right powder in the short term – so far, so good. However, some of you aren’t interested in regularly turning into the incredible Hulk during training. Instead, you want to burn body fat. And for that, there are more effective supplements than boosters: hardcore fat burners. That’s why, for a change, here’s a hardcore fat burner review.

Boosters and hardcore fat burners – similar effects, different objectives

Both boosters and hardcore fat burners stimulate the sympathetic nervous system, thereby activating the body’s stress protocol. This leads to the release of stress hormones, an increase in heart rate, enhanced blood flow to the muscles, and a short-term "reprogramming" of energy metabolism. The key difference between boosters and hardcore fat burners lies in their primary functions: boosters are primarily designed to release performance reserves, while fat burners aim to kickstart lipolysis (fat burning). Consequently, there are differences in their compositions—although many ingredients, such as caffeine, synephrine HCL, and DMAA & co., are found in products from both categories.

In this hardcore fat burner test, you will learn,

  • In this hardcore fat burner test, you will learn which 10 hardcore fat burners are currently the best fat burners on the market (in our view),
  • what advantages they offer or what sets them apart,
  • how we rank these hardcore fat burners on a purchase recommendation scale (and which fat burner is the best hardcore fat burner for us) –, and
  • where you can buy the products.

And that’s not all: Following our fat burner comparison, we explain some fundamental aspects of fat burners. You will learn why fat burners can significantly accelerate weight loss, what side effects they have (or rather, that there are no hardcore fat burners without side effects), who should buy fat burners (and who shouldn’t), and what you need to watch out for when ordering hardcore fat burners. Let’s get started!

NOTE: The products listed below contain substances that may significantly impact individual well-being. Just like hardcore boosters, hardcore fat burners are not suitable for everyone; their use is risky and always undertaken at your own responsibility. In particular, adolescents and female consumers should be cautious with the dosage due to their lower body weight compared to adult men and may need to adjust the manufacturer-recommended dosages accordingly.

The Top 10 Hardcore Fat Burners

Here are our Top 10 Hardcore Fat Burners. The ranking goes from "bottom" to "top," meaning that the 10th place is presented first and the test winner last.

Price winner

Price winner

#10 Freedom Formulations Reign

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Our rating

Good

7.1

Feature

Value

Package contents

90 capsules

Price per capsule

€0,41

Primary active ingredients

Laboratory test

No

#10 Freedom Formulations Reign

FREEDOM FORMULATIONS REIGN THERMOGENIC is the perfect choice for you if you want to reach your fitness goals. The powerful formula combines carefully selected ingredients to maximize fat burning and boost your metabolism. The synergistic effect of the ingredients not only supports fat burning but can also help control your appetite and increase your energy. One of the key components responsible for this is the well-known hardcore stimulant, DMHA. Additionally, it contains the frequently used Yohimbine HCL. Yohimbine is an active ingredient that supports fat burning through various mechanisms. It blocks the activity of alpha-2 adrenoceptors, which increases the release of norepinephrine, thereby promoting lipolysis or the breakdown of fat tissue. Furthermore, Yohimbine can boost metabolism and enhance the body’s thermogenic response, leading to increased calorie burning.

Product Features:

  • Ideal Support for Your Fitness Goals
  • Powerful Formula with Carefully Selected Ingredients
  • Synergistic effects not only support fat burning but can also help control appetite and boost energy.
  • Contains the well-known hardcore stimulant DMHA and the effective active ingredient Yohimbine HCL
#9 Convict Labs ShakeDown

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Our rating

Good

7.3

Feature

Value

Package contents

60 capsules

Price per capsule

€0,75

Primary active ingredients

Laboratory test

No

#9 Convict Labs ShakeDown

The Convict Lab Shake Down is a powerful fat burner designed to support fat loss and boost energy during exercise. With a unique formula of natural ingredients, it offers an effective solution for those looking to achieve their weight loss goal. These capsules help to boost metabolism and maximize fat burning while reducing appetite. Ideal for those looking for a powerful supplement to help them achieve their fitness goals. In addition to classic active ingredients such as caffeine or green tea extract, ShakeDown naturally also contains a few hardcore stimulants. These include Synephrine, Yohimbine Extract and Yohimbine HCL.

Product Features:

  • The included Capsimax Cayenne Pepper Extract raises body temperature and promotes calorie burning.
  • Contains antioxidants that support metabolism.
  • Contains Yohimbine Extract and Yohimbine HCL
#8 Revange Nutrition Latina Lean

Our rating

Good

7.6

Feature

Value

Package contents

60 capsules

Price per capsule

€0,67

Primary active ingredients

Laboratory test

No

#8 Revange Nutrition Latina Lean

Revange Nutrition Latina Lean is the world’s first fat burner specifically designed for women! As expected from Revange Nutrition, the formula of Latina Lean consists of a refined combination of natural ingredients that work synergistically. To ensure sufficient energy during a diet, the product includes guarana and green tea extract. To combat the increased stress that women often face both physically and mentally during a calorie deficit, the manufacturer incorporates L-theanine and Rhodiola Rosea extract. Thanks to ingredients like Yohimbe bark extract and synephrine, which strongly boost thermogenesis and fat metabolism, Revange Nutrition Latina Lean is not only suitable as a daily diet support but also serves as a pre-workout booster before training and intense cardio sessions!

Product Features:

  • Effective Fat Burner for Female Athletes
  • Synergistic Formula that Provides Energy During Dieting
  • Improved Stress Management and Strengthened Immune System
  • Ideal as a Pre-Workout Before Training and Suitable for Cardio Sessions.
#7 Core Labs X Therma Lean

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Our rating

Good

7.9

Feature

Value

Package contents

60 capsules

Price per capsule

€0,67

Primary active ingredients

Various Active Ingredients (Caffeine Anhydrous – 100 mg, Green Tea 98% – 100 mg, Mucuna Pruriens (99.6% L-dopa) – 100 mg, and more)

Laboratory test

No

#7 Core Labs X Therma Lean

Therma Lean is one of the most powerful fat burners on the market, and this performance is due to an impressive mix of various ingredients. In total, there are 29 ingredients, some of which are present in small doses. The stimulating effect on the nervous system is mainly the result of the synergistic interaction of these carefully selected substances. After taking Therma Lean, you will feel a noticeable energy boost, reduced hunger, and a strong thermogenic effect. Therma Lean is designed to provide a fast and effective way to achieve the perfect beach body as a highly potent fat burner. Even stubborn fat on the legs, belly, and hips stands no chance against Therma Lean. Additionally, the product enhances your focus and provides the necessary energy for intense training sessions.

Product Features:

  • Very strong thermogenic effect
  • Reduces Appetite
  • Strong Energy Boost Due to the Included Active Ingredients and Stimulants
#6 Core Labs X Tr-X Power

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Our rating

Very good

8.1

Feature

Value

Package contents

90 capsules

Price per capsule

€0,50

Primary active ingredients

FL-Modafinil, GW-0742, GW-501516 (Cardarine)

Laboratory test

No

#6 Core Labs X Tr-X Power

Core Labs X Tr-X Power is unique in its composition. The manufacturer has included active ingredients that we haven’t seen in other hardcore fat burners. This doesn’t mean the ingredients are a bad choice—quite the opposite! Experienced consumers will quickly notice the unique features. We’re talking about FL-Modafinil, GW-0742, and GW-501516, better known as Cardarine.
FL-Modafinil is a nootropic agent primarily used as a wakefulness-promoting and cognitive enhancer. It works by affecting dopamine and norepinephrine receptors in the brain, leading to increased alertness and improved cognitive performance.
Cardarine is a PPARδ agonist, mainly used as a metabolic regulator and performance enhancer. It works by stimulating the activation of the PPARδ receptor, which boosts metabolism and promotes fat burning. Additionally, Cardarine can improve endurance and stamina by increasing mitochondrial activity and promoting the formation of new blood vessels.

Product Features:

  • Unique Composition with Unusual Active Ingredients Such as FL-Modafinil, GW-0742, and Cardarine (GW-501516)
  • FL-Modafinil serves as a nootropic agent to enhance alertness and cognitive performance
  • The included Cardarine is used to promote fat burning and enhance endurance and performance.
#5 Hard Rock Supps Yellow Bullet Extreme

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Our rating

Very good

8.3

Feature

Value

Package contents

100 Capsules

Price per capsule

€0,45

Primary active ingredients

50mg ephedra

Laboratory test

No

#5 Hard Rock Supps Yellow Bullet Extreme

Yellow Bullet Xtreme is packed with hardcore stimulants. This strongly boosts fat burning and suppresses appetite to the maximum. The highlight of the included stimulants is the 50mg of Ephedra. The action of Ephedra is mainly based on its stimulating effects on the central nervous system. Ephedra contains alkaloids like ephedrine, pseudoephedrine, and norpseudoephedrine, which act on adrenoceptors. These alkaloids primarily stimulate the release of norepinephrine and dopamine, leading to an increase in heart rate, blood pressure, and metabolism. By stimulating the sympathetic nervous system, Ephedra can also reduce appetite and increase thermogenesis, which can result in enhanced fat burning. Combined with the other active ingredients, this makes Yellow Bullet Xtreme capsules an optimal fat burner for anyone looking to quickly shed unwanted pounds!

Product Features:

  • Extreme fat burner packed with hardcore stimulants
  • Contains 50mg of Ephedra for maximum fat burning and appetite suppression
  • Provides an energy and performance boost thanks to the stimulants
#4 Revange Nutrition Thermal Pro Revolution

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Our rating

Very good

8.6

Feature

Value

Package contents

60 capsules

Price per serving

€0,75

Primary active ingredients

Ma Huang (Ephedrine), Synephrine

Laboratory test

No

#4 Revange Nutrition Thermal Pro Revolution

Also one of the most effective fat burners on the market! The Thermal Pro Revolution definitely deserves its place among the Top 5. The highlight of the Thermal Pro Revolution is Ma Huang, a natural substance that has been used in Traditional Chinese Medicine and has a high content of ephedrine! The included 20 mg of ephedrine in the Thermal Pro Revolution lead to noticeable appetite suppression, increased thermogenesis, and the conversion of fat into energy.

Synephrine is a naturally occurring substance found in citrus fruits that is structurally similar to ephedrine. It works synergistically with Ma Huang (ephedrine) in terms of appetite suppression and metabolism. Additionally, it causes bronchodilation, making the Thermal Pro Revolution an ideal product for intense cardio sessions!

Product Features:

  • Contains Ma Huang, which carries a high ephedrine content
  • Accelerates metabolism and thermogenesis
  • Causes a significant suppression of appetite
  • Delivers energy and prevents lethargy during a diet
#3 Hazard Core Acid Melt

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Our rating

Very good

8.7

Feature

Value

Package contents

60 capsules

Price per serving

€0,70

Primary active ingredients

175 mg Caffeine, 80 mg 1,3-Dimethylamylamine (DMAA)

Laboratory test

No

#3 Hazard Core Acid Melt

A first glance at the label will immediately make it clear to the experienced athletes among you: Hazard Core Acid Melt is a hardcore fat burner in the typical style of Revenge Nutrition/Core Labs! With 175 mg of caffeine per capsule and an additional 80 mg of 1,3-Dimethylamylamine (DMAA), an energy-packed duo comes together. The latter likely needs little further explanation for connoisseurs.

This combination promises an enormous energy boost and a euphoric feeling that makes any strong lethargy caused by a caloric deficit in the diet fade away! Mucuna Pruriens (L-Dopa) increases the synthesis of adrenaline and noradrenaline, releasing additional energy and providing an uplifting mood. In synergy, Halostachine HCL and Hordenin HCL contribute to the release of adrenaline and noradrenaline. Alpha GPC ensures a laser-like focus during training or a cardio session.

Product Features:

  • Immense energy release and an euphoric, mood-enhancing effect
  • Strong appetite suppression due to the included hardcore stimulants
  • Each capsule contains 80 mg DMAA and 175 mg caffeine
#2 Rio Labs Rio Lean

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Our rating

Very good

8.9

Feature

Value

Package contents

60 capsules

Servings included

40

Price per serving

€0,67

Primary active ingredients

Similar to Miami Lean (Caffeine Anhydrous – 100 mg, Green Tea 98% – 100 mg, Mucuna Pruriens (99.6% L-dopa) – 100 mg, and more)

Laboratory test

No

#2 Rio Labs Rio Lean

If the Miami Lean (Rank 1) is a bit too strong for you, you should opt for Rio Lean. The fat burner is on par with Miami Lean. Only a minimal change was made to the formula. The change results in significantly better tolerability for many. Therefore, you can expect an equally potent fat burner with demonstrably increased fat burning, which supports you in terms of appetite suppression during the diet while simultaneously providing enough energy for your workouts. Like Miami Lean, the ingredients influence dopamine receptors in the central nervous system, which means that no lethargy occurs during the diet. Instead, you can expect a mood-enhancing effect and a clear focus!

Product Features:

  • Almost the same effect as Miami Lean but much more tolerable
  • Suppresses appetite and provides a massive energy boost
  • Suppresses lethargy and elevates mood
  • Comprehensive formula with a variety of stimulants

Test Winner

Test Winner

#1 Revange Nutrition Miami Lean

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Our rating

Excellent

9.2

Feature

Value

Package contents

30 capsules

Price per capsule

€0,77

Primary active ingredients

32 different ingredients (2-Aminoisoheptane (DMHA) – 150 mg, Caffeine Anhydrous – 100 mg, Green Tea 98% – 80 mg, Mucuna Pruriens (99.6% L-dopa) – 50 mg, and more)

Laboratory test

No

#1 Revange Nutrition Miami Lean

The most outstanding and effective product in the field of hardcore fat burners on the market is Miami Lean by Revange Nutrition. It was specifically developed to elevate fat burning to the highest possible level, achieving diet goals in the shortest possible time. The composition includes an astonishing 32 different ingredients, making it not only innovative but also unique. This formula offers an immense energy boost and simultaneous stimulation that activates the metabolism for almost 8 hours! The stimulating effect on the nervous system is reflected in increased well-being, the elimination of lethargy and fatigue, improved physical performance, as well as enhanced memory, learning ability, and intellectual work.

If Miami Lean is ever unavailable at your trusted shop, there are two great alternatives: Core Labs X Nuke and Hazard Core Acid Melt! Both have an almost identical composition, making them just as effective!

Product Features:

  • For years, the strongest and most effective fat burner on the market
  • Maximum fat burning for about 8 hours after intake!
  • Comprehensive formula with 32 ingredients
  • Made in Germany

Conclusion

All the fat burners in our Hardcore Fat Burner Test are highly effective and offer good value for money when considering their advantages and disadvantages. Every product presented—not just the one in first place, but also every other fat burner mentioned here—is therefore a purchase recommendation. If you want to buy hardcore fat burners, you don’t necessarily have to "jump" on the test winner. Depending on your personal weighting of the evaluation criteria, another fat burner might be the best for you—for example, the one with the most "harmless" ingredient profile.

What Do Hardcore Fat Burners Do?

Fat burners are essentially similar to boosters—they ‘boost’ fat burning. If you’re not exactly sure how energy production works in the body (indeed, this process is highly complex), here is an ultra-short explanation:

The body continuously produces kinetic energy and heat. It uses various energy sources for this, including glycogen (stored sugar) and triglycerides (stored fatty acids). Depending on the type and duration of movement, one source may be used more than the other. For movements that are very strenuous—such as sprinting, squatting, or bench pressing heavy weights—sugar is primarily used, as this energy source can be quickly and abundantly mobilized. For movements that are less strenuous—such as walking, jogging, or cycling—fatty acids are the main energy source. Fatty acids are broken down multiple times during fat metabolism and converted into energy through oxidation (essentially "burned"). And where do the fatty acids come from? From fat reserves! When your body burns fat, the corresponding fat stores on your belly and hips (or thighs, buttocks, or wherever your body prefers to store fat) gradually melt away.

Fat burners can now help to tap into fat reserves earlier and more intensively when there’s a corresponding energy demand than under normal circumstances. In other words, you can lose weight faster with fat burners. However, this only works if you

  1. are physically active so that the body needs to mobilize energy reserves in the first place, and if you
  2. adjust your diet accordingly.

If you stay glued to the sofa binge-watching Netflix and keep adding more fat to your fat stores through your diet, even the best hardcore fat burner in the world won’t make you slimmer.

How Do Hardcore Fat Burners Work?

As previously mentioned, hardcore fat burners stimulate the sympathetic nervous system (which is part of the autonomic nervous system), promoting the release of stress hormones like adrenaline and noradrenaline. These hormones, in turn, bind to receptors in brown adipose tissue—with the effect of boosting thermogenesis (= heat production). The brown fat in the body functions like a heater: it increases core body temperature through fat burning [1].

Depending on their composition, some hardcore fat burners also suppress hunger by ensuring that the satiety hormone leptin is released [2]. You’re then killing two birds with one stone: on one hand, you burn more fat due to increased heat production; on the other hand, you create a calorie deficit because you unconsciously stick to a diet, forcing your body to tap into its fat reserves even more. Both accelerate weight loss.

Side Effects of Hardcore Fat Burners

The spectrum of side effects of hardcore fat burners is quite broad. Which specific side effects can occur depends on the ingredients in the individual product and, of course, on their dosage. Most classic fat burner ingredients are harmless in terms of side effects—ranging from spicy compounds (like capsaicin) and various bitter substances to ingredients that support fat metabolism or regulate blood sugar (choline or chromium)—but there are also "problematic" ingredients. These include:

If you’re true "booster junkies," this is nothing new to you, of course. DMAA & Co. are old acquaintances for you; therefore, we won’t go into detail about the effect and side effect profiles of these substances here. Nonetheless, it should be noted—especially for those of you who have no experience with boosters and have come across this website through search terms like "fat burner test," "fat burner comparison," "fat burner reviews," or "best fat burners"—that the ingredients listed above are psychoactive substances that interfere with the body’s hormonal system. Possible side effects include trembling fingers, rapid heartbeat, inner restlessness, sleep disturbances, dry mouth, loss of appetite, nausea and vomiting, heavy sweating—possibly alternating with chills—and even anxiety.

One more note for all booster enthusiasts out there: Don’t underestimate the pepper aspect in hardcore fat burners! Unlike pre-workout boosters in capsule form, hardcore fat burners almost always contain some kind of pepper—and if you swallow the capsules on an empty stomach, this can literally come back to burn you! Your throat might burn like the gates of hell, and this sensation doesn’t go away even if you drink water. So be warned.

Who Should Use Hardcore Fat Burners?

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Buying Hardcore Fat Burners: What to Consider

There are significant quality differences among hardcore fat burners. Some products contain very few ingredients, while others have many. A larger number of ingredients is generally better than a smaller one; however, some manufacturers "cheat" by listing the same ingredient multiple times under different names on the label. For example, caffeine might be listed once as "caffeine," once as "guaranine," and once as "mate extract.

It is also important to consider the amount of active ingredients per capsule and per daily dose. Ideally, the recommended daily dose should require you to take multiple capsules—this way, you can easily reduce the dosage if needed. However, if the recommended daily dose consists of only a single capsule, the capsules are likely very highly dosed. As a sensitive consumer, you might then face the issue of not being able to "start off" with a smaller dose, since capsules (unlike tablets) are difficult to split.

  1. Dtsch Arztebl (2020): Gewichtsreduktion: Braunes Fett – der Kalorienkiller
    (https://www.aerzteblatt.de/archiv/215741/Gewichtsreduktion-Braunes-Fett-der-Kalorienkiller)
  2. Dtsch Arztebl (1997): Physiologische und pathophysiologische Bedeutung von Leptin beim Menschen (https://www.aerzteblatt.de/archiv/8327/Physiologische-und-pathophysiologische-Bedeutung-von-Leptin-beim
    Menschen)
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