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Best Calorie Deficit Fat Burner Supplements for Men [UPDATED 2021]

Want a calorie deficit? Could a fat burner help? Read on to find out!

Looking to lose those love handles and get back your six pack? You can read hundreds of articles on the internet about how to achieve this, but there is really only one way – entering a calorie deficit.

You’ll know that it’s really, really hard to burn fat to show of your muscles, despite how many times you go to the gym. It’s a fact that we all consume more calories than we think, and if you don’t control your diet, your weight can increase.

That’s why you need to activate a calorie deficit and make your body feel the burn.

What is a calorie deficit?

As you’ll know, a calorie is a unit of energy, and your body stores excess calories as fat.

To enter a calorie deficit you need to use more calories than you are taking on. Which means you need to eat better, and exercise regularly.

Once you’re in a calorie deficit your body can access its stored fat and will get to work burning it off.

Can a supplement help achieve a calorie deficit?

There are lots of types of supplements which could help you on your path to a calorie deficit. The most common of which is the fat burner.

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.

They often contain ingredients like cayenne pepper to help speed up your natural metabolic rate, potentially giving you and edge in burning fat. The best method is a great diet and plenty of exercise, but a good quality fat burner could also provide you with better results.

A great fat burner should be:

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

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.

Check out the best fat burners for calorie deficit below.


Hunter Burn



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  • 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.

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

How does Hunter Burn work?

Natural energy should 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.

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].

Serving Size: 6 Capsules
Servings Per Container: 30
Amount Per Serving % Daily Value
Vitamin D3 (as Cholecalciferol) 3000 IU 750
Konjac Root Extract (Standardized to 90% Glucomannan) 3000 mg **
White Kidney Bean 20:1 Extract 500 mg **
L-Theanine 200 mg **
Matcha Green Tea 200 mg **
Cayenne Pepper Extract 125 mg **
** Daily Value not established
Percent daily values are based on a 2,000 calorie diet.

Is Hunter Burn safe?

After inspecting the Hunter Burn formula our team see it as safe for consumption. No individual ingredient or combination should cause unwanted side-effects (when taken alongside manufacturer guidelines).

What are people saying about Hunter Burn?

  • – “If you are looking for a natural, safe and effective supplement to burn fat, I highly recommend giving Hunter Burn fat burner a try.”
  • – “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.”

How to take Hunter Burn

How to take Hunter Burn

One container of Hunter Burn offers 180 capsules, which equates to a month-long supply.

We recommend you take Hunter Burn following this pattern:

  • Swallow two capsules 30-minutes before breakfast
  • Take the next two half an hour before lunch
  • Finally, consume the final pair 30-minutes before dinner

Each of these three servings should be accompanied by a large glass of water.

The cost of Hunter Burn

Each container of Hunter Burn is filled with 180 capsules – adding up to 30, 6-capsule servings.

One single bottle of Hunter Burn costs: $75/£55

Bundle offers are available for men who choose to buy more than one container. For example, purchasing two bottles of Hunter Burn qualifies you for free US and UK shipping. Buy three and you’ll receive another 180 capsules free of charge, along with worldwide shipping at no additional cost.

Final thoughts on Hunter Burn


Summary: 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.



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Performance Lab SPORT Fat Burner Pros


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  • Streamlined formula
  • Contains thermogenic ingredients
  • May help with appetite control
  • Should support anabolic muscle growth


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

Meet Performance Lab SPORT Fat Burner

Taking third place is the stimulant-free Performance Lab SPORT Burner. 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

Performance Lab SPORT 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.

  • Gym performance enhancers
  • Muscle preservers
  • Muscle builders

How does Performance Lab SPORT Fat Burner work?

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

What ingredients are in Performance Lab SPORT 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.

Serving Size: 2 Plantcaps®
Servings Per Container: 20
Amount Per Serving % Daily Value
Coleus Forskolii root (as Forslean®) (std. for min. 10% forskolin) 250 mg +
HMB (ß-Hydroxy ß-Methylbutyrate) 1000 mg +
Cayenne Pepper Extract (as Capsimax®) (Capsicum annuum) (fruit) (std. for. min. 2% capsaicinoids) 50 mg +
Black Pepper Extract (as BioPerine®) (Piper nigrum) (fruit) (std. for min. 95% piperine) 2.5 mg +
+ Daily Value not established

Is Performance Lab SPORT Fat Burner safe?

Our team have determined that this fat burner should be safe to use. Each of the four ingredients are natural, legal, and distributed in effective servings. None are overfilled or made using chemicals.

Overall, we give Performance Lab SPORT Fat Burner an outstanding score for potential safety.

What are people saying about Performance Lab SPORT Fat Burner?

What are people saying about Performance Lab SPORT Fat Burner?

  • – “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.”

How to take Performance Lab SPORT Fat Burner

One bottle of Performance Lab SPORT Fat Burner contains 60 capsules. This amounts to a 30-day supply of two capsules every 24 hours.

We recommend the following pattern:

  • Capsule one when you wake up, 30-60 minutes before breakfast
  • Second capsule 30-60 minutes before your evening meal

What is the cost of Performance Lab SPORT Fat Burner?

One container of Performance Lab SPORT Fat Burner contains 60 capsules, which adds up to 30 servings. When taken as advised this amount allows for 30-days supplementation.

A single container of Performance Lab SPORT Fat Burner costs: $50/£40

Final thoughts on Performance Lab SPORT Fat Burner

Performance Lab SPORT Fat Burner is a great stimulant-free option. Its streamlined formula is also better suited to people on a budget.

Summary: Performance Lab SPORT 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.



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PhysiqueSeries Fat Burner by Transparent Labs



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  • Natural ingredient choice
  • Potentially offers additional support for mental stress
  • Alternative approach to appetite control
  • Three-pronged thermogenic approach


  • Premium-quality price tag
  • Capsules not vegan or vegetarian friendly
  • Newer product so not many testimonials

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.

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

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.

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].


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

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.

Serving Size: 2 Capsules
Servings Per Container: 60
Amount Per Serving % Daily Value
Forslean® (10% Forskohlin) 250 mg *
Green Tea (50% EGCG) 200 mg *
5-HTP 150 mg *
L-Tyrosine 150 mg *
L-Theanine 120 mg *
Caffeine Anhydrous 120 mg *
White Willow 60 mg *
Cayenne Pepper 50 mg
Synephrine HCI 25 mg
* Daily Value not established

Is PhysiqueSeries Fat Burner safe?

A close inspection of the formula PhysiqueSeries indicated that it should be safe. We saw no red flag, chemical ingredients, and we didn’t detect proprietary blends either.

In short, PhysiqueSeries Fat Burner should be safe. Always follow manufacturer guidelines when taking a metabolism boosting supplement.

How to take PhysiqueSeries Fat Burner

We suggest new users take:

  • One capsule upon waking up
  • Second capsule no later than six hours before bed

But experienced users try:

  • One capsule upon waking before breakfast
  • Second capsule mid-morning
  • Third capsule before lunch
  • Fourth capsule mid-afternoon (try not to take your last capsule within five hours of going to bed. A total caffeine content of 240 mg may impair sleep.

What are people saying about PhysiqueSeries Fat Burner?

  • – “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.”

What is the cost of PhysiqueSeries Fat Burner?

A single bottle of PhysiqueSeries Fat Burner costs: $49.00/£39.16

Final thoughts on PhysiqueSeries Fat Burner


Summary: 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.



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  • Natural
  • Free from stimulants
  • No proprietary blends
  • Vegetarian friendly


  • 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.

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

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.

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].

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].

  1. B Vitamin Complex

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

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

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

[Table amended]
Serving Size: 6 Capsules
Servings Per Container: 30
Amount Per Serving % Daily Value
Vitamin B6 (as Pyridoxine HCI) 1.7 mg 100%
Vitamin B12 (as Methylcobalamin) 2.4 mcg 150%
Chromium (as Nicotinate Glycinate Chelate) 35 mcg 100%
Zinc (as Zinc Oxide) 11 mg 100%
Potassium (as Potassium Chloride) 10 mg < 1%
Glucomannan (from Amorphophallus Konjac) (Root) 3000 mg *
Choline (as Choline Bitartrate) 82.5 mg *
Garnica Cambogia (fruit) Extract (50% Hydroxy Citric Acid) 100 mg *
Green Coffee Bean Ext (50% Chlorogenic Acids) 50 mg *
Turmeric (Curcuma longa) (Root) 50 mg *
Acai Berry Extract 10:1 20 mg *
BioPerine® 5 mg *
* Daily Value not established

† Percent Daily Values are based on a 2,000-calorie diet

Your daily values may be higher or lower depending on your calorie needs

Is Leanbean safe?

Given Leanbean’s all-natural formula and manufacturing process it should be safe to consume. No ingredients stood as dangerous or alarming during inspection.

What are people saying about Leanbean?

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.

How to take Leanbean

According to the product website, Leanbean’s results can be maximized by taking six capsules with at least one to two glasses of water per day. They should be consumed in the following pattern:

  • Two 30 minutes before breakfast
  • Two 30 minutes before lunch
  • Two 30 minutes before dinner

What is the cost of Leanbean?

One bottle of Leanbean contains 180 capsules, which amounts to 30-days of supplementation.

A single bottle of Leanbean costs: $59/£39/ €44.99*

Final thoughts on Leanbean


Summary: 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.




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Our #1 – Instant Knockout CUT



Our top pick is Instant Knockout Cut. If you’d like to purchase, simply click below!


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  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
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  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]

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