SupplementsBest RatedFat BurnersReviews

Best Fat Burner Supplements for Men in 2021 [UPDATED]

Fat burners are not a ‘magic pill’, regardless of advertisements. Instead, they are typically a composition of natural, plant-based compounds that may support healthy fat loss when combined.

A great fat burner should be:

  • Safe
  • Effective
  • All-natural
  • Good value for money

In this feature you’ll find the best fat burners available in 2021. Each one has been carefully chosen, rated and ranked by our panel of experts who’ve analyzed everything from ingredients to serving sizes.

We’ve also measured safety too. None of the product listed here should pose a health risks to the user.

It’s important to understand that this type of supplement is not proven to influence weight loss in any way and should not be relied upon to do so. However, many fat burner ingredients are supported by studies that suggest they could accelerate progress.

Rest assured, we’ve referenced cutting-edge research throughout this review. For both us and your fat-loss results, the test of a good supplement is in the science.

If you’re eating clean, exercising and are in a calorie deficit, these supplements could help you realize your goals sooner. Healthy fat-loss isn’t always easy, but a high-quality fat burner can support it.

The best fat burners you can buy in 2021

  • Cutting-edge formula
  • High quality
  • Natural ingredients
  • No proprietary blends
burn lab pro
  • Streamlined formula
  • Offers mental support
  • Well researched
  • Multi-buy discount
  • Natural formula
  • No additives
  • Plant based
  • Well researched

  • Low stimulants
  • Holistic support
  • Natural ingredients
  • Suitable for men

Benefits of fat burning supplements

High-quality fat burning supplements may offer support in numerous ways. Many supplements are created with the intention of providing help in each step of the fat loss process.

Research suggests that many common fat burner ingredients can:

  • Boost metabolism
  • Increase energy levels
  • Reduce appetite
  • Blunt damage done by overeating
  • Improve fat oxidation
  • Provide antioxidant effects and support biological function

Healthy fat loss may appear to be all about restricting calories and increasing exercise, but it is ultimately a result of maintaining an energy deficit.

Yet, while this is true, there are other factors that can influence this; hunger, mood, energy levels, and physical health all play a part in sustainable body recomposition. A high-quality, premium fat burning supplement should hold ingredients that sustain one or more of these things.

Safety is an important part of any supplement. If it’s reputable, it should be considered safe. Otherwise, we do not feel it is worth the risk to your health, no matter how effective it might be in the short term. While fat burners aren’t designed to be used extensively month after month, they shouldn’t leave lasting side-effects, if any at all. Instead, they should provide users with a safe experience, both during and after taking them.

Rest assured that the supplements included in this list have stood out to us in terms of potential safety and effectiveness. Note that none have been proven to work under scientific conditions – it’s their ingredients that have supporting evidence. We will reference relevant papers and studies to each of these ingredients throughout.

What we’ve looked out for

At SpotMeBro, we pride ourselves on providing clear, complete, and impartial reviews. Our mission statement is to provide insightful information, so you can make the best choice. With that in mind, here’s what goes into constructing each product review:

How we review the best fat burners

In order to write the most fair and impartial reviews, we treat every product the same – regardless of price, reputation, or brand.

To quality control this process, we align each individual product with our set reviewing criterion. This makes it possible to assess potential effectiveness across the board, as well as safety, and product value.

Finding the right supplement to review is our first step. For us, they need to stand out from the crowd, and pique our interest from the start. We’re looking for impressive formulas, natural ingredients, safer serving sizes, and absolutely zero proprietary blends.

After choosing a supplement to test, we’ll start to cross-examine its ingredients with scientific research and evidence. Doing this allows us to closely estimate effectiveness and safety.

Next, we’ll look at cost alongside serving sizes to work out value. While this might not necessarily impact performance, we understand how important value for money is for most men.

What makes a fat burner safe?

Scoring high on our safety test requires:

  • Complete transparency
  • Minuscule risk of side-effects
  • Smart serving sizes & ingredient quantities
  • Zero proprietary blends
  • Quality controlled manufacturing

Scientific evidence is what ultimately makes a fat burner’s ingredients worthwhile. Serving sizes also need to measure up to these studies too, otherwise we consider a supplement over- or under-filled. Overfilling can be an indication of higher side-effect risks.

Proprietary blends are also the sign of a bad supplement. Undisclosed, mysterious mixes are a red flag for safety – as we don’t know what’s in them. It’s impossible to say whether a product may be harmful if supplement companies hide ingredients in this way.

Transparency is the only way to truly judge the potential safety of a product. Note that every fat burner in the following list shows its full list of ingredients.

How we measure effectiveness

Men use fat burning supplements to accelerate their results. Effectiveness is therefore the number one priority when choosing the product for your goals.

Measuring potential effectiveness becomes possible by examining each ingredient. We separate a product formula into individual components, before cross referencing them with scientific evidence. Then, we’ll compile this information to see whether a fat burner should be effective.

When breaking down a formula we ask:

  • Does it contain compounds or elements proven to aid fat burning?
  • Are there relevant studies to support serving sizes?
  • Filler ingredients – are they being used?
  • Is the formula still in line with current research?
  • What are the side-effect risks?
  • Should the quantity of each ingredient work?

Science is the only way we can assess these points. To do this, we reference research papers, studies, and articles from reputable sources. We only use accredited scientific authors and organizations.

Key point: Ingredients are inspected on their own against cutting-edge research knowledge. What we find is then gathered to determine the potential effectiveness of the complete formula.

Keep reading to find out the best fat burners available in 2021.

Read the full reviews


Hunter Burn



Buy now



  • Six natural ingredients
  • Potent streamlined formula
  • Research backed
  • Clinically served
  • Bulk-buy deals offered to save users cash
  • No proprietary blends


  • Higher cost bracket
  • Not vegetarian or vegan friendly (gelatin capsule)
  • Can only be purchased direct from Hunter website

Meet Hunter Burn

Taking the runner up spot for The Best Fat Burner of 2021 is Hunter Burn.

After breaking out during the closing stanza of 2018, Hunter Burn drummed-up immediate buzz. Aimed at high-flying, ambitious men, this premium supplement claims to support the demand of their work-to-lifestyle balance by:

  • Raising metabolism
  • Boosting energy
  • Controlling appetite
  • Blocking carbs

Hunter Burn pledges to provide a fat-burning edge “without substitutes”. According to its creators, the formula has been composed especially for the man who “consistently demands the best”. With a streamlined, potent ingredient composition, Hunter Burn certainly stands out.

Hunter Burn promises to help you:

  • Look and feel better than you have in years
  • Trim the waistline, not muscle
  • Beat hunger cravings
  • Power through the toughest days and avoid energy crashes
  • Have the freedom to do more

All claims aside – we must investigate Hunter Burn thoroughly. On the surface, this is an ambitious supplement, specifically created for an aspirational audience.

Hunter Burn

How does Hunter Burn work?

After taking Hunter Burn men should notice its appetite suppressant qualities taking effect. They may notice their hunger and cravings diminish, which is helpful for fighting overeating.

Natural energy should also be provided by the power of Matcha Green Tea. However, to ward off any possible jitters, L-theanine has been included for a smoother release. Many in the industry have dubbed this combination ‘smart caffeine’ due to the calm focus the duo provides.

Matcha, the more powerful form of Green Tea, also offers thermogenic effects to increase metabolism. Further calorie burning support is also added by Cayenne Pepper to help maintain a deficit diet.

Hunter Burn’s carb blocking ingredient should also start to reduce the amount of potential weight gain experienced from eating carbohydrates. This is something that helps Hunter Burn stand out against the competition, as many older products don’t feature White Kidney Bean.

Once ingested these ingredients should begin to aid the fat loss process.

What ingredients are in Hunter Burn?

What’s in Hunter Burn?

Cayenne Pepper

As we’d expect from a respectable fat burner, Hunter Burn contains a potent serving of cayenne pepper. This is a very common, widely used thermogenic [1].


Also known as konjac root, glucomannan is a soluble fiber found in South East Asia. According to scientific research, it should be effective at reducing appetite and providing feelings of fullness [6].

Matcha Green Tea

Rather than opt for the commonly used caffeine anhydrous, Hunter have chosen matcha green tea. The safe natural caffeine content found within it should offer energy support, including enhanced attention [14] and additional fat burning benefits [15].

Vitamin D

Including vitamin D is an intelligent move as it’s shown to promote testosterone production [16]. In turn, healthy male hormone levels may result in increased lean mass, reduced body fat, and better energy levels [17].

White Kidney Bean

Unlike almost-all lower-tier competitors, Hunter Burn contains white kidney bean. This smart ingredient should work to help block the digestion of carbs [18].

What are people saying about Hunter Burn?

Although a newer supplement, our team found many Hunter Burn reviews online. And much like Instant Knockout, almost all of them were positive.

Here are excerpts taken from three:

  • – “If you are looking for a natural, safe and effective supplement to burn fat, I highly recommend giving Hunter Burn fat burner a try.”
  • – “…combining green tea, cayenne pepper and glucomannan should make it a particularly effective fat burner, with the added benefit of a carb blocker in the white kidney bean extract.”
  • – “It contains good [servings] of some of the best ingredients and doesn’t use a proprietary blend. If you’re looking for a high-end product and don’t mind paying a little bit extra, then Hunter Burn is a very good option indeed.”

Price is a common theme in Hunter Burn reviews just like the ones for Instant Knockout. Hunter Burn is unarguably at the top end in terms of cost, mostly due to its high-grade formula and manufacturing processes. However, although it is expensive, we feel it’s worth the cost.


Check Latest Hunter Burn Deals

Final thoughts on Hunter Burn

Hunter Burn have broken onto the fat burning scene with a set of standout debut supplements – with this weight management aid as the start of the show.

This supplement’s sleek engineering and cutting-edge formula makes it ideal for the professional. There are no fillers in Hunter Burn, which is clear in their choice of only six ingredients.

Finely tuned larger servings are selected to meet the needs of today’s busy man. Premium quality makes it good value for money too. However, we feel Instant Knockout is more established and affordable, which is why Hunter Burn places second. Hunter Burn broke onto the supplement market with an impressive cutting-edge formula and the most potent servings we’ve seen. We recommend this complete fat burner for men who can afford its premium price.



Buy now




Burn Lab Pro Fat Burner


burn lab pro

Buy now



  • Streamlined formula
  • Contains thermogenic ingredients
  • May help with appetite control
  • Should support anabolic muscle growth
  • Stimulant free
  • High-safety score
  • Vegan friendly
  • Optimized daily distribution


  • Zero caffeine content
  • Less mental support
  • Fewer physique protecting vitamins and minerals

Meet Burn Lab Pro Fat Burner

Taking third place is the stimulant-free Burn Lab Pro. Not only does this supplement promise to burn fat, it also claims to support muscle too.

According to its creators it is designed to:

  • Increase metabolism
  • Help fasted training results
  • Support muscle
  • Provide energy
  • Control hunger

Burn Lab Pro Fat Burner should deliver good fat loss results because of its smart stacking strategy and ample potency. It’s stimulant free, as the creators decided to focus on supporting muscle-building to burn fat.

Burn Lab Pro Fat Burner also has Coleus Forskohlii and HMB, which are to innovative fat burners that should combine to work as:

  • Gym performance enhancers
  • Muscle preservers
  • Muscle builders
  • An effective strategy for lean body composition, especially if you are doing intermittent fasting or fasted training.

On top of its muscle building combo, Burn Lab Pro stacks cayenne pepper as CapsiMax®, a research-backed patented fat burner. BioPerine® is also a patented black pepper extract that can boosts absorption and thermogenesis.

How does Burn Lab Pro Fat Burner work?

Stimulant-free fat burners like this one sometimes take a different, more unique approach to supporting your goals. Burn Lab Pro is designed to aid fat loss, by supporting muscle building.

Once ingested, Burn Lab Pro Fat Burner should start to accelerate your metabolism. Cayenne Pepper Extract’s thermogenic effect should raise your body temperature through boosted calorie burn – something that may be amplified by Black Pepper increasing Cayenne’s bioavailability.

HMB and Coleus forskohlii, in theory, should then start to positively influence muscle building. While HMB is added to neutralize muscle damaging enzymes (among other benefits), Coleus forskohlii should regulate both thermogenesis and testosterone production. As testosterone is essential for both muscle building and a lean body composition – this last ingredient is a major, often underrated player.

What ingredients are in Burn Lab Pro Fat Burner?

HMB (ß-Hydroxy ß-Methylbutyrate)

HMB (ß-Hydroxy ß-Methylbutyrate) at 1000mg has been added to optimize fasted training results [19].

This metabolite of the amino acid leucine should protect your physique by neutralizing muscle-damaging enzymes. Protein synthesis can also increase after taking HMB too [19].

Coleus forskohlii

Coleus forskohlii, has been shown to optimize hormonal cell messengers to regulate thermogenesis and testosterone [21].

Not only that, but it should also activate the enzyme protein kinase, which encourages lipase to enable fat breakdown [21].

Cayenne Pepper Extract

Another regulator of thermogenesis is cayenne pepper extract. Studies have shown this spicy powder triggers thermogenic reactions inside the body, raising metabolism [1].

Black Pepper Extract

The thermogenic efforts of SPORT Fat Burner are also backed up by black pepper extract, which can increase bioavailability. This ingredient limits adipogenesis, which is the generation of new fat cells.

What are people saying about Burn Lab Pro Fat Burner?

Like the other products in our top five, online reviews for Burn Lab Pro are mainly positive. People are impressed by the stimulant-free formula featuring only four ingredients.

Here are three takeaways from online reviews:

  • – “For the price, this is the best value for money fat burner on the market. It is cheaper than the other premium supplements out there, not only that, we’d say the quality is a lot better too.”
  • – “This supplement may help give you a slight fat-burning edge, but it’s unlikely to make a huge difference. However, the included ingredients are safe and relatively mild, so it may be worthwhile to try out.”
  • – “A very impressive product that’s an ideal option for anyone who uses fasted training”

However, not all reviews are completely in favor of this fat burner. A few mention the limited number ingredients as a possible downside. Plus, some reviewers would have rather seen caffeine in the mix for a bigger energy boost.

Check Latest Burn Lab Pro Deals

Final thoughts on Burn Lab Pro Fat Burner

Burn Lab Pro Fat Burner is a great stimulant-free option. Its streamlined formula is also better suited to people on a budget. If you enjoy fasted training, then Burn Lab Pro should help protect your physique. Also, unlike some others, this fat burner says it works by building muscle first. It doesn’t use many thermogenic ingredients or caffeine to aid fat loss. This could be a downside for some. Burn Lab Pro Fat Burner is an innovative, streamlined, and stimulant free option for men who want a different approach. We recommend it for additional muscle building support.


burn lab pro


Buy now




PhysiqueSeries Fat Burner by Transparent Labs



  Buy Now 



  • Natural ingredient choice
  • Potentially offers additional support for mental stress
  • Alternative approach to appetite control
  • Three-pronged thermogenic approach
  • Safe and easy to use
  • Lower stimulant rating
  • Allows for steady distribution


  • Premium-quality price tag
  • Capsules not vegan or vegetarian friendly
  • Newer product so not many testimonials
  • Doesn’t support muscle as much

Meet PhysiqueSeries fat burner

Securing fourth position is Transparent Labs PhysiqueSeries Fat Burner. Featuring a nine-ingredient profile, it looks to support fat burning with a three-pronged approach.

Once consumed, this fat burner should:

  • Increase metabolism
  • Offer mental support
  • Give slight energy boost

Thermogenic compounds forslean, green tea extract, and synephrine should increase resting metabolism. This trident of heat-inducing ingredients may help raise calorie burn more than diet alone.

Next, the not-so-obvious use of HTP-5 is added to combat hunger cravings. Whereas most fat burners look toward caffeine and glucomannan, PhysiqueSeries thinks outside the box.

In fact, the caffeine content of each serving is only 120 mg. This may appeal to stimulant sensitive users.

PhysiqueSeries also offers additional mental support. They foresaw the stress sometimes caused by dieting and tried to counteract it with numerous ingredients.

Transparent Labs say their fat burner is perfect for:

  • Science-based fat loss
  • Increased basal metabolic rate
  • Increased clean energy and focus
  • Reduced hunger and cravings

How does PhysiqueSeries Fat Burner work?

PhysiqueSeries Fat Burner could help men reduce body fat in a number of ways. Not only does it offer actual physical benefits, but mental backing too.

As the ingredients inside this fat burner are absorbed, they should begin their thermogenic process. Your body temperature should rise, and your natural calorie burn could increase. If you’re within a calorie deficit this should aid fat burning.

Caffeine and Green Tea extract should also provide an energy boost while dieting. Motivation and drive can wane when calories are reduced, and the body tries to conserve energy – these ingredients are intended to help sidestep that.

Anti-stress and mood enhancers are also important for fat loss. Fortunately, Transparent Labs have included the likes of L-Tyrosine and 5-HTP in their supplement to help here. Improved mood could help with everything from reducing snacking to feeling encouraged to work harder during exercise.

What ingredients are in PhysiqueSeries Fat Burner?

Green Tea Extract

One of green tea’s body-benefiting factors is aiding fat loss. Research has shown that EGCG’s inside this ingredient decrease fat synthesis, increase fat breakdown, and promote better glucose utilization [21].

The caffeine content of green tea should also provide both energy and raised metabolism [4] [5]. When combined with l-theanine (present in green tea), the stimulant effect of caffeine can be smoothed out. This helps users get a clean feeling of focus [21].


This ingredient should offer mental support for your fat loss-journey. It does this by helping promote serotonin secretion.

Studies have linked 5-HTP to suppressing appetite in overweight dieting individuals [23]. Plus, people who take 5-HTP have been found to have lower carb intake and show fat-loss while displaying reduced appetite [24].

Forslean (10% forskolin)

Forskolin is included to stimulate the release of stubborn fatty acids from body fat. In turn, this should make the weight-loss process easier.

One study published in Obesity Research and Clinical Practice discovered Forslean supplementation decreased body fat while increasing lean muscle in obese men [25].


This is the active form of tyrosine and is a strong anti-stress amino acid. Some research has even shown it can lower stress during extended periods of consciousness, as well as after intense exercise [26] [27].

According to Transparent Labs this ingredient could help to reduce the mental challenges of being on a diet and may influence adherence.

Caffeine Anhydrous

This ingredient is a common part of fat burners and is a dehydrated, powdered version of caffeine.

Studies have linked it to better energy boosting effects than coffee [7]. Plus, it’s a powerful thermogenic that should increase resting calorie burning [9].

People who supplement with caffeine often experience better blood sugar control too [8]. This is an import process that should aid fat loss.

What are people saying about PhysiqueSeries Fat Burner?

This fat burning supplement has been on the market for a while now so there are other reviews out there. As expected, a lot of them are positive. We were not able to find any before and after testimonials from customers, however.

But not everybody is a fan of the PhysiqueSeries formula, and the online supplement community is slightly split. Some people like the mental-support approach, while others prefer more muscle maintenance vitamins.

Here are three opinions from other online reviewers:

  • – “The Physique Series Fat Burner contributes to eliminating excess belly fat thereby promoting a physically fit and healthy body. Moreover, the stress relieving hormones additionally helps in controlling stress levels associated with losing weight and dieting.”
  • – “Although PhysiqueSeries does contains some decent ingredients, there are too many things missing for us to class it as one of the very best products out there at the moment.”
  • – “Great energy, no burn out, and the best results we’ve seen thus far! What more can you ask for?”

One thing almost all reviews mentioned it this fat burner’s caffeine content. If you’re sensitive to stimulants, you may want to start on a small serving size. While the amount of caffeine is small it’s still worth checking your response first.


Check Latest PhysiqueSeries Fat Burner Deals


Final thoughts on PhysiqueSeries Fat Burner

PhysiqueSeries Fat Burner features a complete, comprehensive formula to aid fat loss. Although it contains traditional thermogenic ingredients, it also offers mental support. For this reason, we’d recommend this to men who want to remove stress from dieting.



Buy now






Buy now



  • Natural
  • Free from stimulants
  • No proprietary blends
  • Vegetarian friendly
  • Should suppress appetite
  • May support metabolism
  • Multi-buy bundles


  • Low caffeine (some may find this a con)
  • Expensive
  • Less physique support

Meet Leanbean

In fifth place is Leanbean – the female fat burner that has surprising benefits for men.

This fat burner has undergone a transformation recently, eliminating some ingredients and upping the dose of other well-known fat loss supporting compounds.  Let’s take a look at what’s inside.

Created using 12 ingredients, Leanbean offers a rich formula to aid fat loss, as well as supplying numerous superfoods. And although it is marketed toward women – the ingredients inside can impact fat burning for both sexes.

Men who take Leanbean should experience:

  • Boosted metabolism
  • Suppressed appetite
  • Better blood sugar levels
  • Reduced inflammation

All without high amounts of the stimulant Caffeine. Instead, the creators say their fat burner provides energy using modest quantities from natural sources like Green Coffee Bean.

Leanbean also features body balance promoting vitamins and superfoods. Poor metabolism, inflammation, and toxins should be less of an issue because of this. The likes of acai, for example, could aid blood sugar levels. Furthermore, this product should also help curb cravings and manage your hunger.

How does Leanbean work?

Leanbean looks to boost metabolism via Turmeric and Green Coffee Bean, which have been proven to provide thermogenic effects and raised calorie burn [36] [29]. Fat oxidation can also be amplified by Green Tea, as it’s EGCG catechins influence enzymes that trigger adipose cells to release fat.

Superfood extracts and vitamins also fill Leanbean’s formula to protect the body. The official website says these extracts help to create optimal body balance – helping you achieve a normal, energy yielding metabolism and reach a healthy bodyweight. BioPerine® of these holistic choices.

There are also ingredients included in this product that should encourage serotonin production. This, alongside the potential craving diminishing qualities of Glucomannan, may reduce overeating.

Leanbean markets itself on a low Caffeine content delivered inside natural sources like Green Coffee Bean and Garnicia Camobogia. According to the manufacturer they aren’t as powerful as the popular anhydrous form – studies show this to be true also [7].

Consistent supplementation of Leanbean should enhance fat loss.

What ingredients are inside Leanbean?

  1. Konjac Fibre (Glucomannan)

Glucomannan is a dietary fiber extracted from the root of the Konjac plant. It has been well documented as an aid to weight loss thanks to its ability to suppress appetite [6].

Once ingested, this soluble fiber begins to slowly expand in the stomach. This creates a sensation of fullness without increasing the user’s calorie count. Therefore, it can help men stay within their necessary calorie deficit.

  1. B Vitamin Complex

Like many other health supplements, Leanbean contains a B Vitamin Complex. Including these essential vitamins helps to promote better metabolism, muscle function, and nervous system health – three things vital to sustainable fat loss.

B vitamins can also aid in warding off tiredness during calorie restriction. It’s because of this they’re commonly associated with energy and motivation [31].

3. Zinc

A key mineral found in a number of different plant and animal foods, zinc may be essential in aiding immunity as well as reducing inflammation.

Its inclusion in Leanbean however is more to do with its effect on weight loss. Studies have shown that zinc supplementation can improve BMI, heighten weight lost and improve triglyceride levels [34].

  1. Turmeric

Leanbean call this their healthy alternative to Caffeine Anhydrous, a potent stimulant. It won’t provide the same alertness and energetic qualities but has similar thermogenic capabilities [32].

Turmeric also contains a compound called Curcumin, which has anti-inflammatory properties. Therefore, this ingredient may offer recovery from exercise [33].

5. Choline

Leanbean include Choline in the formula for its role in many different bodily processes. Because our bodies don’t produce enough of the nutrient, we must supplement our intake through food or other sources.

Choline is known to help with the metabolism of fat – breaking down fat for use as an energy source [35].

What are people saying about Leanbean?

As Leanbean has been on the market for some time there are many reviews for it online. Here is a collection of key excerpts taken from them:

  • com – “Leanbean definitely has some interesting research supporting its fat burning properties. It’s still important to keep in mind that if you’re eating more calories than you burn, it’s not likely to make a huge difference. What this product appears to do, though, is potentially reduce your appetite and maintain energy levelsto make calorie restriction an easier feat to accomplish.”
  • com – “Most of the ingredients are backed by evidence-based science.”
  • com – “It’s pretty plain to see that we rate this supplement pretty highly… You may find that there are less expensive options out there, but then you do have to be mindful about quality. Many similar products conceal the complete list of ingredients and don’t display the ‘supplement facts’ openly on their website.”
  • com – “Leanbean seems to be an honest product containing plenty of beneficial natural ingredients not only for weight loss but also for the health in general.”

Much like all reviews concerning top-tier supplements there is a mention of price. However, as The Sport Review say, this is a reflection on the quality of Leanbean. While there are cheaper alternatives, we find they’re typically lower quality, which is why we still see Leanbean as providing good value for money.


Check Latest Leanbean Deals


Final thoughts on Leanbean

We recommend Leanbean to men who want a holistic fat burner with a less aggressive formula. The ingredients do have relevant studies proving their worth, meaning it also has a high level of potential effectiveness. If Leanbean is in your budget and you’d prefer a subtle fat burning supplement – this might be it.




Buy now



  1. Ludy, MJ et al. The effects of capsaicin and capsiate on energy balance: critical review and meta-analyses of studies in humans. Chem Senses. 2012
  2. Hursel R, Viechtbauer W, Westerterp-Plantenga M. Effects of green tea on weight loss and weight maintenance. A meta-analysis. Appetite. 2009;52(3):838. doi:10.1016/j.appet.2009.04.099
  3. Dulloo A, Duret C, Rohrer D et al. Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans. Am J Clin Nutr. 1999;70(6):1040-1045. doi:10.1093/ajcn/70.6.1040
  4. Dulloo A, Seydoux J, Girardier L, Chantre P, Vandermander J. Green tea and thermogenesis: interactions between catechin-polyphenols, caffeine and sympathetic activity. Int J Obes. 2000;24(2):252-258. doi:10.1038/sj.ijo.0801101
  5. Goldstein E, Ziegenfuss T, Kalman D et al. International society of sports nutrition position stand: caffeine and performance. J Int Soc Sports Nutr. 2010;7(1):5. doi:10.1186/1550-2783-7-5
  6. Zalewski, BM et al. The effect of glucomannan on body weight in overweight or obese children and adults: a systematic review of randomized controlled trials. Nutrition. 2015; 31(3): 437-42
  7. Goldstein E, Ziegenfuss T, Kalman D et al. International society of sports nutrition position stand: caffeine and performance. J Int Soc Sports Nutr. 2010;7(1):5. doi:10.1186/1550-2783-7-5
  8. Keijzers, GB et al. Caffeine can decrease insulin sensitivity in humans. Diabetes Care. 2002; 25(2): 364-9
  9. Harpaz E, Tamir S, Weinstein A, Weinstein Y. The effect of caffeine on energy balance. J Basic Clin Physiol Pharmacol. 2017;28(1):1-10. doi:10.1515/jbcpp-2016-0090
  11. Giesbrecht T, Rycroft JA, Rowson MJ, De Bruin EA. The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness. Nutr Neurosci. 2010 Dec;13(6):283-90. doi: 10.1179/147683010X12611460764840. PMID: 21040626.
  12. Sarris J, Byrne GJ, Cribb L, Oliver G, Murphy J, Macdonald P, Nazareth S, Karamacoska D, Galea S, Short A, Ee C, Birling Y, Menon R, Ng CH. L-theanine in the adjunctive treatment of generalized anxiety disorder: A double-blind, randomised, placebo-controlled trial. J Psychiatr Res. 2019 Mar;110:31-37. doi: 10.1016/j.jpsychires.2018.12.014. Epub 2018 Dec 8. PMID: 30580081.
  13. Temple, J. L., Bernard, C., Lipshultz, S. E., Czachor, J. D., Westphal, J. A., & Mestre, M. A. (2017). The Safety of Ingested Caffeine: A Comprehensive Review. Frontiers in psychiatry, 8, 80. doi:10.3389/fpsyt.2017.00080
  14. Einöther S, Giesbrecht T. Caffeine as an attention enhancer: reviewing existing assumptions. Psychopharmacology (Berl). 2012;225(2):251-274. doi:10.1007/s00213-012-2917-4
  15. Astrup A, Toubro S, Cannon S, Hein P, Breum L, Madsen J. Caffeine: a double-blind, placebo-controlled study of its thermogenic, metabolic, and cardiovascular effects in healthy volunteers. Am J Clin Nutr. 1990;51(5):759-767. doi:10.1093/ajcn/51.5.759
  16. Pilz S, Frisch S, Koertke H et al. Effect of Vitamin D Supplementation on Testosterone Levels in Men. Hormone and Metabolic Research. 2010;43(03):223-225. doi:10.1055/s-0030-1269854
  17. Tyagi V, Scordo M, Yoon RS, Liporace FA, Greene LW. Revisiting the role of testosterone: Are we missing something?. Rev Urol. 2017;19(1):16-24.
  18. Celleno L, Tolaini MV, D’Amore A, Perricone NV, Preuss HG. A Dietary supplement containing standardized Phaseolus vulgaris extract influences body composition of overweight men and women. Int J Med Sci. 2007;4(1):45-52. Published 2007 Jan 24.
  19. Holeček M. Beta-hydroxy-beta-methylbutyrate supplementation and skeletal muscle in healthy and muscle-wasting conditions. J Cachexia Sarcopenia Muscle. 2017;8(4):529-541. doi:10.1002/jcsm.12208
  20. Godard M, Johnson B, Richmond S. Body Composition and Hormonal Adaptations Associated with Forskolin Consumption in Overweight and Obese Men. Obes Res. 2005;13(8):1335-1343. doi:10.1038/oby.2005.162
  21. Grove K, Lambert J. Laboratory, Epidemiological, and Human Intervention Studies Show That Tea (Camellia sinensis) May Be Useful in the Prevention of Obesity. J Nutr. 2010;140(3):446-453. doi:10.3945/jn.109.115972
  22. Parnell H, Owen G, Rycroft J. Combined effects of L-theanine and caffeine on cognition and mood. Appetite. 2006;47(2):273. doi:10.1016/j.appet.2006.07.051
  23. Rondanelli M, Klersy C, Iadarola P, Monteferrario F, Opizzi A. Satiety and amino-acid profile in overweight women after a new treatment using a natural plant extract sublingual spray formulation. Int J Obes. 2009;33(10):1174-1182. doi:10.1038/ijo.2009.155
  24. Cangiano C, Ceci F, Cascino A et al. Eating behavior and adherence to dietary prescriptions in obese adult subjects treated with 5-hydroxytryptophan. Am J Clin Nutr. 1992;56(5):863-867. doi:10.1093/ajcn/56.5.863
  25. Godard M, Johnson B, Richmond S. Body Composition and Hormonal Adaptations Associated with Forskolin Consumption in Overweight and Obese Men. Obes Res. 2005;13(8):1335-1343. doi:10.1038/oby.2005.162
  26. Neri, D. F., Wiegmann, D., Stanny, R. R., Shappell, S. A., McCardie, A., & DL, M. C. K. A. Y. (1995). The effects of tyrosine on cognitive performance during extended wakefulness.. Aviation, space, and environmental medicine, 66(4), 313–9. Retrieved from
  27. Medicine, I., Board, F. N., Research, C. M. N., & Marriott, B. M. (1994). Food Components to Enhance Performance: An Evaluation of Potential Performance-Enhancing Food Components for Operational Rations. Washington, DC, United States of America: National Academies Press.
  28. Sugino T, Shirai T, Kajimoto Y, Kajimoto O. l-Ornithine supplementation attenuates physical fatigue in healthy volunteers by modulating lipid and amino acid metabolism. Nutrition Research. 2008;28(11):738-743. doi:10.1016/j.nutres.2008.08.008
  29. Onakpoya I, Terry R, Ernst E. The use of green coffee extract as a weight loss supplement: a systematic review and meta-analysis of randomised clinical trials. Gastroenterol Res Pract. 2010;2011:382852. doi:10.1155/2011/382852
  30. Dulloo A, Geissler C, Horton T, Collins A, Miller D. Normal caffeine consumption: influence on thermogenesis and daily energy expenditure in lean and postobese human volunteers. Am J Clin Nutr. 1989;49(1):44-50. doi:10.1093/ajcn/49.1.44
  31. Vitamins and minerals – B vitamins and folic acid. Published 2019. Accessed July 18, 2019.
  32. Di Pierro F, Bressan A, Ranaldi D, Rapacioli G, Giacomelli L, Bertuciolli A. Potential role of bioavailable curcumin in weight loss and omental adipose tissue decrease: preliminary data of a randomized, controlled trial in overweight people with metabolic syndrome. Preliminary study. Eur Rev Med Pharmacol Sci. 2015;19(21):4195-202.
  33. Chainani-Wu N. Safety and Anti-Inflammatory Activity of Curcumin: A Component of Tumeric (Curcuma longa). The Journal of Alternative and Complementary Medicine. 2003;9(1):161-168. doi:10.1089/107555303321223035
  34.  Payahoo L, Ostadrahimi A, Mobasseri M, et al. Effects of zinc supplementation on the anthropometric measurements, lipid profiles and fasting blood glucose in the healthy obese adults. Adv Pharm Bull. 2013;3(1):161–165. doi:10.5681/apb.2013.027  
  35. Elsawy G, Abdelrahman O, Hamza A. Effect of choline supplementation on rapid weight loss and biochemical variables among female taekwondo and judo athletes. J Hum Kinet. 2014;40:77–82. Published 2014 Apr 9. doi:10.2478/hukin-2014-0009
  36. El Hadi H, Di Vincenzo A, Vettor R, Rossato M. Food Ingredients Involved in White-to-Brown Adipose Tissue Conversion and in Calorie Burning. Front Physiol. 2019;9:1954. Published 2019 Jan 11. doi:10.3389/fphys.2018.01954
[Note: We do not get paid to feature any supplements in our review. However, SpotMeBro may receive a small affiliate commission if a purchase is made through our links. Find out more here]

One Comment

  1. I enjoy your discuss about fat burning supplements, i have being longing to find out whats best in respect to supplements and it they are generally good for consideration.

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button