9 Best Fat Burners for Men [2021]

There is no escaping the fact that losing weight can be a slow and challenging process. You need to exercise regularly and watch what you eat and drink. You may even need to give up some of your favorite foods. There may also be times where you feel tired, moody, or hungry.

The good news is that fat burners can help you lose weight more quickly and easily. But which are the best fat burners for men?

There are hundreds of different fat burners around, and some are more effective than others. Some of these popular supplements are nothing more than caffeine pills. In contrast, others contain exotic herbs and other ingredients that calm your appetite and increase your metabolism, making any diet much easier to stick to.

To help you choose the right fat burner, we’ve tried, tested, and reviewed eight of the best. Each of these products can help you lose weight quicker and easier, but only when combined with a healthy diet and regular exercise program.

Best Fat Burners for Men

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as of October 11, 2021 3:34 pm
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as of October 11, 2021 3:34 pm
Last updated on October 11, 2021 3:34 pm

1. Phen Gold

Phen Gold Tub


Phen Gold helps you lose weight in five different ways. Its unique formulation is designed to burn fat, prevent new fat production, reduce your appetite, increase your energy, and improve your mood. As fat burners go, this is a real do-it-all product.

Key Features

  • Caffeine for increased mental and physical energy and faster fat burning
  • Nopal cactus extract for fiber, less hunger, and longer-lasting energy
  • L-carnitine for more efficient fat burning
  • Chromium picolinate for more stable blood glucose and fewer cravings
  • Capsicum and niacin for increased thermogenesis
  • Piperine to increase the effectiveness of the other ingredients

Dieting can wreak havoc on your mood and mindset. Cravings and lost motivation can soon lead to comfort eating, and that’s a surefire way to derail any diet. The mood-boosting ingredients in Phen Gold are a very welcome addition that will make sticking to your chosen diet much easier.

For the full Phen Gold review click here.


  • Proven, tested ingredients
  • Vegan-approved formulation
  • Boosts mental and physical energy


  • Not suitable for users with caffeine sensitivities
  • Only available online

With 145mg of caffeine per serving, Phen Gold is a high-stim fat burner that should not be used after 3-5 pm as it could stop you sleeping. However, it’s proven formulation will speed up fat loss. This is a top-rated, well-reviewed product.

2. Alpha Lion Shredder

Alpha Lion Shredder is a potent fat burner, pre-workout energizer, and appetite suppressant designed to make losing weight quicker and easier. Packed with tried-and-tested, scientifically proven ingredients, this well-formulated product attacks stored body fat on several different fronts at once.

Key Features

  • Scientifically proven, high-stim formula
  • All-day energy matrix to beat fatigue and improve vitality
  • Fat burning matrix to increase metabolism
  • X-factor matrix to decrease hunger and increase insulin sensitivity

With 300mg of caffeine per serving, you’ll definitely feel this product working. Not only will it crank your metabolism up to the max, it’ll also boost your energy so that you can work out harder and longer than usual. This will accelerate the fat loss process even more. 


  • Easy to use
  • Powerful formula
  • Proven ingredients
  • Fast-acting
  • Increases energy while boosting fat burning and decreasing hunger


  • May contain too much caffeine for some users
  • Quite expensive
  • A 90-capsule container will only last 15 days if you take the recommended six capsules per day

While no fat burner will work unless you eat right and exercise, the powerful ingredients in Alpha Lion Shredder will multiply your efforts, so you lose weight and burn fat faster than ever before. The high caffeine content may be a problem for some users, but any side effects can be avoided by using less than the recommended six capsules per day.

3.Instant Knockout

instant knockout bottle


If you want a fat burner you can really feel working, Instant Knockout is the one for you. Loaded with 300mg of caffeine per serving, this product will boost your energy and focus for faster fat burning and great workouts.

Key Features

  • Green tea extract for increased fat burning
  • Cayenne pepper seeds for increased thermogenesis
  • High fiber glucomannan for appetite suppression
  • Anhydrous caffeine for energy, alertness, and focus
  • Vitamins B6 and B12 for health and energy
  • Chromium for more stable blood glucose levels
  • Zinc for better carbohydrate metabolism and increased testosterone production
  • Green coffee bean extract for fewer carb cravings and to delay the absorption of fat
  • Piperine to increase the effectiveness of the other ingredients

Instant Knockout is more than just a high-caffeine pep pill. Instead, it contains additional ingredients designed to speed up fat loss and preserve muscle mass. If you want a high-stim fat burner that will noticeably increase your energy levels, you’ll LOVE Instant Knockout.

Read the full Instant Knockout review here. 


  • Powerful, proven formula
  • High energy ingredients
  • Ideal for exercisers
  • Suppresses hunger while accelerating fat loss


  • 300 mg of caffeine may cause unwanted side effects in some users

Instant Knockout is part fat burner and part pre-workout energizer. If you take this product much after 5 pm, it’ll probably keep you awake all night too! If you are okay with such a high-stim fat burner, this product will definitely help you lose weight faster.

4. Clenbutrol

Clenbutrol bottle crazybulk


Clenbutrol is not the same as clenbuterol – a drug used by bodybuilders to burn fat and build muscle. However, this product does contain active, safe, natural, fat-burning ingredients that can help you lose weight.

Key Features

  • Vitamin B3 for enhanced fat burning
  • Garcinia cambogia for less new fat cell formation
  • Bitter orange extract for increased metabolic rate and thermogenesis
  • Guarana extract to boost energy and fight fatigue

This is an excellent product that contains several proven fat-burning ingredients. However, marketing it as a clenbuterol alternative is very misleading as there is nothing in its formulation to support these claims. That’s a shame because, inaccurate marketing strategies aside, this product should still help you burn fat and lose weight.


  • Powerful, proven formulation
  • Modest caffeine content
  • Designed to boost focus, energy and fat burning, while suppressing appetite


  • Very misleadingly named product
  • Contains gelatin so not suitable for vegetarians or vegans
  • Expensive

Clenbutrol should not be confused with clenbuterol, but that doesn’t mean it’s not a good fat burner for men. This fat burner is safe and legal to use, but the same cannot be said for similarly named clenbuterol.

5. BurnXT

burn xt bottle


Burn XT is another high-stim fat burner designed with men in mind. This well-formulated product contains the same amount of caffeine as two large cups of coffee, so you’ll definitely feel it working. It’s ideal for dieters looking for more mental and physical energy.

Key Features

  • Acetyl-l-carnitine for increased fat burning and more energy
  • Green tea leaf extract for its thermogenic properties
  • Anhydrous caffeine for energy, focus, and fat burning
  • Cayenne pepper extract for increased thermogenesis
  • Bioperine to increase the effectiveness of the other ingredients

Thermogenic supplements increase your temperature, which, in turn, speeds up fat burning. In simple terms, thermogenics turn up your fat-burning thermostat. Burn XT contains two thermogenic agents to ensure you burn fat as fast as possible.


  • Powerful formulation
  • Boosts mental and physical energy
  • Suitable for vegetarians and vegans
  • Budget-friendly price


  • 275 mg of caffeine per serving may cause unwanted side effects in some users

This high-caffeine fat burner is ideal for people who want a product that has a noticeable effect on energy and focus. It may be too intense for some, but as high-stim fat burners go, this one is very good.

6. Vintage Burn

Vintage Burn

2 new from $48.51
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as of October 11, 2021 3:34 pm


  • Burn Fat & Preserve Muscle: Stay in shape in and outside of the gym with the best fat burner weight loss supplement on the market. Vintage Burn’s appetite suppressing and muscle-preserving features will help keep you in shape, even during a period of limited exercise. Its unique keto friendly, thermogenic weight loss formula puts it above other fat burners by helping men and women burn fat for energy while preserving muscle, raise mental focus, mood, and curb appetite.
  • Boost Energy & Suppress Appetite: The hand-selected premium ingredients in Vintage Burn help you maintain a steady energy throughout any activity, raise your mental focus at work or in the gym, and keep your mood elevated while you go about your day. Our repeat customers have praised Vintage Burn’s ability to significantly curb their appetite which helps keep calories in check.
  • Tested & Trusted: Third-party tested fat burner made exclusively with premium ingredients including green coffee bean extract, green tea extract, and raspberry ketones to help burn stubborn belly & abdominal fat. Unlike the other guys, Vintage Burn has zero artificial substances, zero synthetic additives, zero preservatives. Vintage Burn is the best thermogenic weight loss supplement on the market to support a solid diet program.
  • GUARANTEED RESULTS OR YOUR MONEY BACK. Old School Labs firmly stands by the quality, effectiveness, and commitment to no proprietary blends as a brand standard. Vintage Burn Thermogenic Weight Loss, Vintage Blast Energy Pre-workout, Vintage Brawn Isolate Protein, Vintage Build Creatine & BCAA, Vintage Base Multivitamin & Probiotics as well the rest our line-up clearly display this. If you are not 100% satisfied with any OSL product, we will help you resolve your concern or provide a full refund.
  • Old School Labs, 40 years in the making, formulated in California, and Made in the USA. Ultra-pure and clean supplements for physique perfection or life changing transformations. From pre-workouts, multivitamins, protein, to amino acids, greens, and thermogenic fat burners, we have the right supplement and nutritional solution for you. We’re here to answer your questions via social media or email so that you can achieve your goals the Old School way. #oldschoollabs #teamosl #iamoldschool

Vintage Burn, like most of this company’s products, is aimed at male exercisers who want to burn fat and build muscle at the same time. Made from a broad spectrum of ingredients, this product will increase fat burning, boost your energy, and also contains healthy antioxidants too.

Key Features

  • Green coffee bean extract for reduced fat absorption
  • Garcinia cambogia to prevent new fat cell formation
  • Green tea leaf extract for increased metabolic rate
  • Anhydrous caffeine for more energy and faster fat burning
  • Forskolin for improved fat metabolism
  • Olive leaf extract for more stable blood glucose and fewer cravings
  • Chrysin for increased testosterone production
  • Bacopa leaf extract for increased cognition and reduced stress

If there is one ingredient in Vintage Burn that’s a little iffy, it’s raspberry ketones. Unlike the rest of the compounds in this product, raspberry ketones are not proven fat burners. They won’t boost fat burning or energy. Thankfully, the remaining ingredients in this product are proven to work, and that makes Vintage Burn a good fat burner for men.


  • Easy to take one-a-day capsules
  • All-natural formulation
  • Contains health-boosting antioxidants
  • Strong, energizing formulation


  • High caffeine content may leave some users feeling overstimulated
  • Quite expensive

You should feel this high-stim product working within 30 minutes of taking it. Because you only need one capsule per day, you can take your dose early, so it won’t stop you sleeping. The high-caffeine formulation also means this product is an excellent pre-workout supplement.

7. Simply Health Extreme

Simply Health Extreme

as of October 11, 2021 3:34 pm


  • NATURAL METABOLISM BOOST & FAT BURNER: Our Scientifically-Formulated best thermogenic Fat Burner will boost your metabolic functions, making them work at full capacity, at the same time acting as an appetite suppressor and boosting your energy levels.
  • Our Most Powerful Top Weight Loss Pills! Reduce Belly Fat And Boost Metabolism while you’re following a weight loss program.
  • Extra Strength Diet Pills, Optimal Fat Blast and Calorie Burning while following a calorie controlled diet
  • Our New Formula Starts Working Faster and its Effect Lasts even Longer. Leaner Slimmer You Or 100% of Your Money Back!
  • Simply Health Products Are Proudly Made In the U.S.A, In An FDA Registered And Inspected Facility

Simply Health Extreme Fat Burner contains a long list of fat burning ingredients to help make losing weight a whole lot easier. In fact, it contains so many ingredients that there are too many to list! The good news is that virtually everything in this well-priced product is tried, tested, and proven to work.

Key Features

  • Vitamin C and B6 for health, energy, and fat burning
  • GLA and CLA for increased thermogenesis
  • L-carnitine for energy and fat burning
  • Inositol for reduced carb and fat digestion
  • Turmeric for a faster metabolic rate
  • Garcinia cambogia to limit the formation of new fat cells
  • Coenzyme Q10 for more energy
  • Cinnamon and chromium for increased insulin sensitivity and lower blood glucose

Of all the fat burners on review, this one is arguably the most comprehensive. Simply Health has put everything but the kitchen sink in this formulation! The one thing it doesn’t contain is a whole lot of caffeine. That’s good news for users who want to avoid feeling overstimulated.


  • Very well-priced
  • Powerful thermogenic formulation
  • Caffeine-free


  • Contains gelatin, so not suitable for vegetarians or vegans
  • Contains potential allergens from fish and shellfish
  • Large serving size of four capsules
  • Contains a proprietary blend

Some of the ingredients in this product are listed as a proprietary blend. This means that, while the individual compounds are listed, their quantities are not. That’s a shame because it’s always nice to know how much of each ingredient you are consuming. That said, everything in Simply Health Extreme Fat Burner is a proven fat-fighting ingredient. This product will undoubtedly help you lose weight faster.

8. Evlution Nutrition Trans4orm

Evlution Nutrition Trans4orm

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as of October 11, 2021 3:34 pm


  • Complete Fat Burning And Energizing Weight Loss Support Formula: Advanced Fat Loss Ingredient Complex That Supports Critical Areas Of Effective Weight Management Including Fat Burning, Energy Levels, Appetite Support, Metabolism Support, And Increased Mental Focus.
  • More Benefits: More Than Just A Fat Burner, Trans4orm Boosts Energy And Mental Focus To Perform At Your Best Throughout The While You’re Following A Weight Loss Program.
  • Target Fat Not Muscle: Trans4orm’s Ingredients Target Fat Burning Not Muscle, Using Thermogenic Ingredients To Support Fat Loss, While With Proper Diet And Exercise, Preserving Muscle Mass.
  • No Proprietary Blends: Trans4orm’s Ingredient Label Is Fully Transparent, Meaning You Can See The Exact Amounts Of Every Fully Dosed Ingredient.
  • Highest Quality: Made With Premium Quality Ingredients That Must Pass A Strict Supplier Audit Process To Ensure They Meet Our Quality And Safety Standards. During Manufacturing, We Analyze Samples Every 30 Minutes And Inspect Every Bottle Visually At The End Of Production. After Manufacturing, Samples Are Sent To An Independent 3rd Party Lab To Verify Purity And Ingredient Amounts. Trans4orm Is Made In A Plant That Is Certified For Good Manufacturing Practices.

Evlution Nutrition Trans4orm is a multifunctional weight loss supplement designed to aid in weight loss in four different ways. It helps speed up your metabolism through increased thermogenesis, increases fat burning, gives you energy, and helps improve mental focus. Made from all-natural ingredients, this product is very well formulated.

Key Features

  • Vitamins B3, B6, and B12 for increased energy, better health, and fat burning
  • Green tea leaf extract for increased metabolism
  • L-tyrosine for improved alertness, focus, and attention
  • Caffeine anhydrous for more energy and mental focus
  • Yohimbe extract for faster fat burning
  • A-GPC for increased focus and mood enhancement
  • Coleus extract to increase testosterone, build muscle and burn fat
  • Piperine to increase the effectiveness of the other ingredients

While Evlution Nutrition Trans4orm Thermogenic Fat Burner can be used by women, it is better suited to men. As well as being a fat burner, this product contains ingredients that can enhance muscle building as well as fat burning. Its high-stim formula will also boost your energy and focus for more effective workouts.


  • Large number of proven ingredients
  • Energizing formulation
  • No proprietary blends
  • All-natural ingredients
  • Well-priced product


  • Gelatin capsules not suitable for vegetarians or vegans
  • High caffeine content may be too much for some users

This powerfully formulated product contains a lot of proven fat burning ingredients. Made with a decent shot of caffeine, you should soon feel Evlution Nutrition Trans4orm Thermogenic fat Burner starting to work. Avoid taking too close to bedtime as this supplement could interfere with sleep.

9. Dr. Emil ShredFuel Thermogenic

Dr. Emil – Thermogenic Fat Burner

as of October 11, 2021 3:34 pm


  • HIGH DOSAGE WITHOUT THE SIDE EFFECTS -. Our formula was prudently crafted with precise dosage levels to provide maximum benefits without causing jitters, insomnia or headaches, which are common in many weight loss pills and ft burners. Our formula features a potent and carefully designed blend of metabolism boosters, appetite suppressants and thermogenic fat burners including:: Green Tea, Caffeine Anhydrous, Garcinia Cambogia and Green Coffee Bean

Dr. Emil Hodzovic is a medical doctor, nutrition expert, and bodybuilder. Bodybuilders are judged not just on the size of their muscles, but their definition too. Subsequently, Dr. Emil is uniquely qualified to create sports supplements. ShredFuel is his premier thermogenic fat burner.

Key Features

  • Green tree extract for energy and fat burning
  • Green coffee bean extract for increased thermogenesis
  • Caffeine anhydrous for energy, focus, and fat burning
  • Raspberry ketones for energy
  • Garcinia cambogia to prevent the formation of new fat cells

This doctor-formulated fat burner contains a lot of proven ingredients. And, yet, despite having been formulated by a world-regarded nutritional expert, it contains clinically unproven raspberry ketones and a proprietary blend, which means it’s impossible to know how much of each ingredient you are consuming. This fat burner definitely works, but more label clarity would have been useful. For example, this product contains caffeine, but it is unclear how much.


  • Good range of ingredients
  • Fast-acting formulation
  • Suitable for vegetarians and vegans
  • Well-priced product


  • Proprietary blend means quantities are not known
  • Contains unspecified amounts of caffeine

While this product really does work, it’s hard to say exactly why because the amount of each ingredient is not known. It does contain caffeine, and it’s a safe bet to say it’s at least 100 mg per serving, but it may be more. If you are okay with caffeine, then this product should produce great results. However, if you are sensitive to the effects of caffeine, you may want to avoid this product as it might contain more than you are comfortable taking.

Key Information about Fat Burners for Men

Fat burners can definitely help you lose weight faster and easier. But, before you use these powerful supplements, make sure you consider the following essential information.

How to get the most out of fat burners

 Fat burners are very effective supplements, but you’ll get more from them if you use them properly. You can’t just pop a few capsules and expect to start losing weight! Get the most from your chosen product by using it correctly.

  1. Follow the manufacturer’s instructions – each formulation is different, so make sure you check the guidelines and follow them. This includes any information on timing as well as how many capsules you need to take.
  2. Start off with the smallest recommended dose – taking too much too soon could cause unwanted side effects. If you are given a range to use, start at the low end and increase gradually and according to your tolerance.
  3. Do not exceed the recommended daily maximum – when it comes to fat burners, more is not always better. In most cases, exceeding the maximum recommended dose won’t help you lose weight faster, but will make any side effects worse.
  4. Combine fat burners with a sensible diet and exercise program – as effective as fat burners can be, they aren’t magic bullets. They support healthy weight loss and only work if you work too. Think of fat burners as effort multipliers; the harder you try, the better their effect will be.
  5. Don’t take fat burners for prolonged periods – fat burners work best when used for relatively short periods, such as 2-3 months. If you use a fat burner for longer than this, you may become accustomed to the ingredients, and they may cease being effective. If you need to use a fat burner for a long time, swap formulations from time to time to avoid developing a tolerance.

Potential side effects

Fat burners usually contain natural, proven, safe ingredients. However, because they affect your metabolism and energy levels, they may also have some unwanted side effects. Those side effects include:

  • Tremors
  • Restlessness
  • Anxiety
  • Headaches
  • Insomnia
  • Stomach upsets
  • Loose stools
  • Increased urination
  • Rashes

In most cases, the main ingredient responsible for any side effects is caffeine. Some fat burners contain way more caffeine than a large, strong coffee. If you have a caffeine sensitivity, you may find that your chosen fat burner comes with some unwanted side effects. If caffeine causes problems, choose a stim-free fat burner. These products increase your metabolism without caffeine and usually have far fewer side effects.

Ingredients to look for and ingredients to avoid

Fat burners contain lots of different ingredients. Some are herbs and spices, while others are vitamins, minerals, or amino acids. The best ingredients to look for in fat burners are natural as they usually have the least number of unwanted side effects.

It’s impractical to list all the ingredients used in fat burners. Still, some of the best choices include green tea extract, L-carnitine, L-tyrosine, CLA, green coffee bean extract, curcumin, ginger, cinnamon, ashwagandha root extract, niacin, chromium picolinate, and glucomannan.

Harmful or useless ingredients you should try and avoid include:

Ephedrine – a once-popular thermogenic, ephedrine, and its close relative ephedra, have been banned by the FDA because of their dangerous side effects.

Raspberry ketones – unlike real BHB ketones, raspberry ketones won’t increase fat burning, boost your energy, or speed up your metabolism. They are not the same ketones your body produces during a low-carb keto diet.

Naringin – extracted from grapefruit, naringin may help you lose weight, but we don’t really know how this substance works. It’s only effective for a few people too. Naringin probably won’t do you any harm, but it’s not a proven fat burner.

Hordenine – chemically similar to bitter orange extract, hordenine is often used in place of this proven fat fighter. There is very little evidence to support the effectiveness of this compound. Seek out real bitter orange extract instead, an ingredient supported by science.

DHEA – this naturally occurring hormone may help you burn fat and build muscle. Still, it comes with a lot of side effects, such as increased testosterone production. Most men should avoid manipulating their hormone levels as doing so can lead to serious medical problems.

Bottom Line

Fat burners for men make weight loss easier. They don’t work miracles, but, combined with a sensible diet and exercise program, they can help you get a better weight loss return for your time and energy.

Some fat burners make sticking to your diet easier, by beating hunger and providing you with a much-needed psychological boost. Others enhance fat burning by speeding up your metabolic rate. Some do both.

With so many products to choose from, it can be hard to decide which one is right for you. The main choice you need to make is whether to buy a product that contains a lot of caffeine or one that’s caffeine and stim-free. Caffeine IS an effective fat burner and energizer, but it also comes with a host of side effects, not least anxiety, and insomnia.

Once you have made this critical decision, you should find choosing the best fat burner much easier. Use your selected product following the manufacturer’s instructions and in conjunction with a sensible diet and exercise program, and you’ll soon be on your way to reaching your weight loss goals.

9.8 Total Score
Fat Burners for Men

Choosing the best fat burner for men is easy with our detailed reviews and ratings.

Alpha Lion Shredder
Instant Knockout
Burn XT
Vintage Burn
Simply Health Extreme
Evlution Nutrition Trans4orm
Dr. Emil - Thermogenic Fat Burner
User Rating: 5 (9 votes)


Patrick Dale is an ex-British Royal Marine and owner and lecturer for a fitness qualifications company. In addition to training prospective personal trainers, Patrick has also authored three fitness and exercise books, dozens of e-books, thousands of articles, and several fitness videos.

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