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Natural Caffeine

BodyTech
4.6
★ ★ ★ ★ ★
(11 ratings)
Caffeine 200 mg
Product Image
Score81
A transparent coffee-sourced caffeine tablet with strong value, best suited to experienced users who tolerate a full high-dose serving.
How scoring works
Quantity:100 Tablet(s) • (100 servings)
Goals:
Energy
Fitness
Mental Focus
Metabolism Boost
Weight Loss
Productivity Boost

Score 81

A transparent coffee-sourced caffeine tablet with strong value, best suited to experienced users who tolerate a full high-dose serving.
How scoring works
$0.00($0.00 per serving)
iHerb
$ 0.00
Report prices

Analysis

Coffee-derived caffeine supplies direct support for alertness, focus, and exercise drive. With no other active ingredients, the effect is easy to understand and track.

The caffeine source and amount are both clearly identified, which improves transparency over generic stimulant blends. A single high-dose tablet is efficient, though it offers limited fine-tuning for sensitive users.

Regular caffeine users seeking a simple work or training aid may find the value attractive. People prone to anxiety, rapid heartbeat, or sleep disruption should choose a lower-dose format.

Who is it for
  • Adults with regular caffeine tolerance
  • People wanting a simple coffee-derived stimulant
Best for
  • Alertness and mental focus
  • Pre-workout energy at low cost

Pros

  • Caffeine source is identified
  • Exact amount is disclosed
  • One-tablet serving
  • Low serving cost

Cons

  • Dose may be excessive for beginners
  • Little serving flexibility
  • No supporting hydration or performance ingredients
  • Late use can impair sleep

Warnings

  • Caffeine may cause jitteriness, anxiety, or palpitations
  • Avoid use close to bedtime
  • Do not stack casually with coffee, energy drinks, or stimulant pre-workouts
  • Pregnant people should follow clinician-guided caffeine limits

Nutrient quality

86 Highest impact

The clearly stated caffeine amount is effective for acute stimulation. The identified form improves quality, while immediate delivery may feel strong for sensitive users.

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Ingredient transparency

85 Highest impact

The active dose is clear and unblended. complete directions and inactive ingredients remain unavailable.

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Customer satisfaction

54 Moderate impact

The supplied average is strong and based on a small sample. No review themes were provided, so consistency and purpose-specific experience cannot be assessed.

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Value for money

94 Highest impact

A meaningful caffeine amount at a very low serving cost supports excellent value. The simple formula trades breadth and smoother delivery for direct economic efficiency.

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Report analysis

Goals

Energy
Energy
Impact
Highest effect
A+ Goal FitA Strength of SupportC- CoverageA+ Formula Quality
Caffeine · 200 mg

Caffeine directly increases acute alertness and reduces perceived fatigue. Its effects on attention and exercise performance are supported by strong human evidence.

The 200 mg amount provides a clearly defined moderate stimulant dose. Coffee-derived caffeine is fully quantified, though no sustained-release feature is provided. The 200 mg caffeine amount may cause jitteriness, raise heart rate, or disrupt sleep, especially when combined with coffee or other stimulants.

Study evidence
Caffeine Supportive 68 studies
Fitness
Fitness
Impact
Highest effect
A Goal FitA Strength of SupportC- CoverageA+ Formula Quality
Caffeine · 200 mg

Caffeine provides a focused route to alertness, perceived effort, and exercise performance. Caffeine has robust human evidence for endurance, power, vigilance, and reduced perceived effort.

The stimulant-only approach does not support hydration, muscle repair, ATP regeneration, or acid buffering. The streamlined formula is easy to assess and avoids distracting low-dose additions.

Study evidence
Caffeine Supportive 255 studies
Mental Focus
Mental Focus
Impact
Highest effect
A+ Goal FitA Strength of SupportC- CoverageA Formula Quality
Caffeine · 200 mg

Coffee-derived caffeine provides a clearly disclosed 200 mg dose with a reliable acute effect on alertness and vigilance. The single tablet is simple, but it offers stimulation rather than broader support for stress or neurotransmitter balance.

The dose may cause jitteriness, anxiety, a faster heartbeat, or sleep disruption in caffeine-sensitive users. Taking it late in the day can reduce sleep quality and undermine focus the following day.

Study evidence
Caffeine Supportive 128 studies
Metabolism Boost
Metabolism Boost
Impact
Highest effect
A Goal FitA- Strength of SupportC- CoverageA+ Formula Quality
Caffeine · 200 mg

Coffee-derived caffeine provides direct, well-studied stimulation and a modest increase in energy expenditure and fat mobilization. The 200 mg amount is clearly stated and substantial enough to produce noticeable stimulant effects for many users.

A single-ingredient tablet offers strong depth without formula clutter. People sensitive to caffeine should avoid stacking it with other stimulants or using it near bedtime because the full immediate-release dose may cause jitteriness, palpitations, or sleep disruption.

Study evidence
Caffeine Disputed 40 studies
Weight Loss
Weight Loss
Impact
Highest effect
A- Goal FitA Strength of SupportD+ CoverageA+ Formula Quality
Caffeine · 200 mg

Coffee-derived caffeine provides a direct, well-supported stimulant pathway that may modestly increase energy expenditure. The 200 mg amount is strong enough to affect alertness and training output.

A single stimulant does not address satiety, nutrition, or muscle preservation. The full immediate dose may cause jitteriness, rapid heartbeat, anxiety, or sleep disruption in caffeine-sensitive users.

Study evidence
Caffeine Disputed 14 studies
Productivity Boost
Productivity Boost
Impact
Highest effect
A Goal FitA Strength of SupportD+ CoverageA Formula Quality
Caffeine · 200 mg

Coffee-derived caffeine provides a direct and predictable increase in alertness. The clearly disclosed amount suits users seeking a strong acute stimulant effect.

The formula lacks theanine or another calming component to smooth stimulation. Caffeine may cause jitters, sleep disruption, anxiety, or a faster heartbeat in sensitive users.

Study evidence
Caffeine Supportive 108 studies
Muscle Gain
Muscle Gain
Impact
Moderate effect
D+ Goal FitB+ Strength of SupportF CoverageB Formula Quality
Caffeine · 200 mg

Caffeine can improve workout performance but does not directly stimulate muscle protein synthesis or provide a hypertrophy substrate. Human evidence supports acute performance benefits, not caffeine alone as a reliable lean-mass intervention.

The disclosed amount is a practical moderate stimulant serving. A single-ingredient stimulant is internally simple. Caffeine may cause jitteriness or disturb sleep in sensitive users.

Study evidence
Caffeine Supportive 31 studies

Ingredients

IngredientAmount per serving
Caffeine (Coffee)
 200 mg
Gluten Free Adults 18–50 Sugar Free Vegetarian
Report overview
Caffeine (Coffee) · 200 mg OverallScore86
C Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Coffee-derived caffeine is clearly quantified at 200 mg, giving the simple tablet a practical moderate dose. The label provides no sustained-release technology, so the full amount is likely delivered promptly. An exceptionally low serving cost makes it highly economical.

View ingredientView products
Loading alternative details
84 Performance

L-Theanine & Caffeine

SR Sports Research
<p>L-Theanine & Caffeine provides a more purposeful alternative because it combines 100 mg green-coffee caffeine with 200 mg L-theanine and medium-chain triglycerides. Added L-theanine shifts the formula toward combined energy and focus compared with Natural Caffeine, while using a lower caffeine amount than many direct tablets or pre-workouts.</p>
84 Performance

Smart Caffeine with L-Theanine

NS Natural Stacks
<p>Smart Caffeine with L-Theanine provides a more purposeful alternative because it combines 100 mg green-coffee caffeine with 200 mg L-theanine. Added L-theanine shifts the formula toward combined energy and focus compared with Natural Caffeine, while using a lower caffeine amount than many direct tablets or pre-workouts.</p>
83 Performance

TheanineUP Focused Energy

California Gold Nutrition
<p>TheanineUP Focused Energy provides a more purposeful alternative because it pairs 100 mg caffeine with L-theanine, cocoa, and matcha. Added L-theanine shifts the formula toward combined energy and focus compared with Natural Caffeine, while using a lower caffeine amount than many direct tablets or pre-workouts.</p>
87 Budget

Caffeine 200 mg

ALLMAX
<p>Caffeine 200 mg costs less per serving, and it supplies 200 mg caffeine anhydrous in a single-active formula. Both are straightforward caffeine products, although the caffeine source and supporting calcium differ from Natural Caffeine.</p>
82 Budget

Caffeine 200 mg

Best Naturals
<p>Caffeine 200 mg costs less per serving, and it supplies 200 mg caffeine anhydrous with a small amount of calcium. Both are straightforward caffeine products, although the caffeine source and supporting calcium differ from Natural Caffeine.</p>
82 Budget

High Caffeine 200 mg

Natrol
<p>High Caffeine 200 mg costs less per serving, and it supplies 200 mg caffeine with calcium in a simple tablet. Both are straightforward caffeine products, although the caffeine source and supporting calcium differ from Natural Caffeine.</p>
82 Value

Elite

Eu Natural
<p>Elite costs more per serving, but it pairs 100 mg caffeine with 200 mg L-theanine; the supplied value evidence is still reasonably competitive. Added L-theanine shifts the formula toward combined energy and focus compared with Natural Caffeine, while using a lower caffeine amount than many direct tablets or pre-workouts.</p>
70 Value

Energy + Focus

ZHOU
<p>Energy + Focus costs more per serving, but it pairs natural caffeine with 200 mg L-theanine; the supplied value evidence is still reasonably competitive. Added L-theanine shifts the formula toward combined energy and focus compared with Natural Caffeine, while using a lower caffeine amount than many direct tablets or pre-workouts.</p>
74 Value

Hydroxycut Hardcore Elite

MuscleTech Performance Series
<p>Hydroxycut Hardcore Elite costs more per serving, but it combines 270 mg caffeine with green coffee, L-theanine, cocoa, coleus, and yohimbe; the supplied value evidence is still reasonably competitive. The broader stimulant blend is more complex than Natural Caffeine, so tolerance and ingredient fit deserve extra attention.</p>
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Effect of caffeine ingestion on time trial performance in cyclists: a systematic review and meta-analysis.
    Chen B; Ding L; Qin Q; Lei TH; Girard O; Cao Y · Journal of the International Society of Sports Nutrition · 2024
    Meta-analysis15 studies pooledFitness forCaffeine
  2. Using coffee to compensate for poor sleep: Impact on vigilance and implications for workplace performance.
    Anderson JR; Hagerdorn PL; Gunstad J; Spitznagel MB · Applied ergonomics · 2018
    Randomized trial69 participantsMental Focus forCaffeine
  3. Caffeine administration at night during extended wakefulness effectively mitigates performance impairment but not subjective assessments of fatigue and sleepiness.
    Paech GM; Banks S; Pajcin M; Grant C; Johnson K; Kamimori GH; Vedova CB · Pharmacology, biochemistry, and behavior · 2017
    Randomized trial24 participantsEnergy forCaffeine
  4. No effects of caffeine on cycling to exhaustion and perceptual responses in non-caffeine-restricted subjects.
    Weippert M; Behrens M; Schlegel M; Schröder T; Tillmann M; Rühe N; Römer R; Mau-Möller A; Bruhn S · Journal of the International Society of Sports Nutrition · 2025
    Randomized trial56 participantsEnergy Fitness forCaffeine
  5. Physiological and cognitive responses to caffeine during repeated, high-intensity exercise.
    Crowe MJ; Leicht AS; Spinks WL · International journal of sport nutrition and exercise metabolism · 2007
    Randomized trial17 participantsMental Focus forCaffeine
  6. A critical review of caffeine withdrawal: empirical validation of symptoms and signs, incidence, severity, and associated features.
    Juliano LM; Griffiths RR · Psychopharmacology · 2005
    Systematic review66 studies pooledEnergy forCaffeine
  7. Caffeinated Coffee and Tea Consumption, Genetic Variation and Cognitive Function in the UK Biobank.
    Cornelis MC; Weintraub S; Morris MC · The Journal of nutrition · 2020
    Cross-sectional study445,786 participantsMental Focus forCaffeine
  8. Effect of caffeine ingestion on cycling performance: a systematic review and meta-analysis.
    Wu J; Xu K; Yin M; Ding X; Wang T; Zhang Q; Wu X; Xiao N · Frontiers in nutrition · 2026
    Meta-analysis226 participants20 studies pooledFitness forCaffeine
  9. Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis.
    Wang Z; Qiu B; Gao J; Del Coso J · Nutrients · 2023
    Meta-analysis254 participants21 studies pooledFitness forCaffeine
  10. Acute effects of caffeine on attention: a comparison of non-consumers and withdrawn consumers.
    Smith AP; Christopher G; Sutherland D · Journal of psychopharmacology (Oxford, England) · 2013
    Randomized trial70 participantsMental Focus forCaffeine
  11. Differential cognitive effects of energy drink ingredients: caffeine, taurine, and glucose.
    Giles GE; Mahoney CR; Brunyé TT; Gardony AL; Taylor HA; Kanarek RB · Pharmacology, biochemistry, and behavior · 2013
    Randomized trial48 participantsEnergy forCaffeine
  12. Caffeine, CYP1A2 Genotype, and Endurance Performance in Athletes.
    Guest N; Corey P; Vescovi J; El-Sohemy A · Medicine and science in sports and exercise · 2019
    Randomized trial101 participantsFitness forCaffeine
  13. Effects of modafinil and caffeine on night-time vigilance of air force crewmembers: A randomized controlled trial.
    Wingelaar-Jagt YQ; Bottenheft C; Riedel WJ; Ramaekers JG · Journal of psychopharmacology (Oxford, England) · 2023
    Randomized trial32 participantsMental Focus forCaffeine
  14. Does Single or Combined Caffeine and Taurine Supplementation Improve Athletic and Cognitive Performance without Affecting Fatigue Level in Elite Boxers? A Double-Blind, Placebo-Controlled Study.
    Ozan M; Buzdagli Y; Eyipinar CD; Baygutalp NK; Yüce N; Oget F; Kan E; Baygutalp F · Nutrients · 2022
    Randomized trial20 participantsEnergy forCaffeine
  15. Placebo in sports nutrition: a proof-of-principle study involving caffeine supplementation.
    Saunders B; de Oliveira LF; da Silva RP; de Salles Painelli V; Gonçalves LS; Yamaguchi G; Mutti T; Maciel E; Roschel H; Artioli GG; Gualano B · Scandinavian journal of medicine & science in sports · 2018
    Randomized trial42 participantsFitness forCaffeine
  16. The effects of L-theanine, caffeine and their combination on cognition and mood.
    Haskell CF; Kennedy DO; Milne AL; Wesnes KA; Scholey AB · Biological psychology · 2008
    Randomized trialMental Focus forCaffeine
  17. Trait Energy and Fatigue Modify the Effects of Caffeine on Mood, Cognitive and Fine-Motor Task Performance: A Post-Hoc Study.
    Fuller DT; Smith ML; Boolani A · Nutrients · 2021
    Randomized trialEnergy forCaffeine
  18. Acute Effects of Caffeine Supplementation on Movement Velocity in Resistance Exercise: A Systematic Review and Meta-analysis.
    Raya-González J; Rendo-Urteaga T; Domínguez R; Castillo D; Rodríguez-Fernández A; Grgic J · Sports medicine (Auckland, N.Z.) · 2021
    Meta-analysis12 studies pooledFitness forCaffeine
  19. Caffeine and attentional control: improved and impaired performance in healthy older adults and Parkinson's disease according to task demands.
    Sharma K; Fallon SJ; Davis T; Ankrett S; Munro G; Christopher G; Coulthard E · Psychopharmacology · 2022
    Randomized trial68 participantsMental Focus forCaffeine
  20. Effect of Caffeine on Golf Performance and Fatigue during a Competitive Tournament.
    Mumford PW; Tribby AC; Poole CN; Dalbo VJ; Scanlan AT; Moon JR; Roberts MD; Young KC · Medicine and science in sports and exercise · 2016
    Randomized trial12 participantsEnergy forCaffeine
  21. Acute Effects of Caffeine Supplementation on Physical Performance, Physiological Responses, Perceived Exertion, and Technical-Tactical Skills in Combat Sports: A Systematic Review and Meta-Analysis.
    Delleli S; Ouergui I; Messaoudi H; Trabelsi K; Ammar A; Glenn JM; Chtourou H · Nutrients · 2022
    Meta-analysis26 studies pooledFitness forCaffeine
  22. The combined effects of L-theanine and caffeine on cognitive performance and mood.
    Owen GN; Parnell H; De Bruin EA; Rycroft JA · Nutritional neuroscience · 2009
    Randomized trial27 participantsMental Focus forCaffeine
  23. Effects of Caffeine Intake on Cognitive Performance Related to Total Sleep Deprivation and Time on Task: A Randomized Cross-Over Double-Blind Study.
    Quiquempoix M; Sauvet F; Erblang M; Van Beers P; Guillard M; Drogou C; Trignol A; Vergez A; Léger D; Chennaoui M; Gomez-Merino D; Rabat A · Nature and science of sleep · 2022
    Randomized trial24 participantsEnergy forCaffeine
  24. Can I Have My Coffee and Drink It? A Systematic Review and Meta-analysis to Determine Whether Habitual Caffeine Consumption Affects the Ergogenic Effect of Caffeine.
    Carvalho A; Marticorena FM; Grecco BH; Barreto G; Saunders B · Sports medicine (Auckland, N.Z.) · 2022
    Meta-analysis60 studies pooledFitness forCaffeine
  25. The effect of mouth rinsing with different concentrations of caffeine solutions on reaction time.
    Virdinli SG; Kutlay E; Yuzbasioglu Y; Vollaard NBJ; Rudarli Nalcakan G · Journal of sports sciences · 2022
    Randomized trial45 participantsMental Focus forCaffeine
  26. Caffeine Supplementation and Physical Performance, Muscle Damage and Perception of Fatigue in Soccer Players: A Systematic Review.
    Mielgo-Ayuso J; Calleja-Gonzalez J; Del Coso J; Urdampilleta A; León-Guereño P; Fernández-Lázaro D · Nutrients · 2019
    Systematic review17 participants17 studies pooledEnergy forCaffeine
  27. Sex Differences in the Ergogenic Response of Acute Caffeine Intake on Muscular Strength, Power and Endurance Performance in Resistance-Trained Individuals: A Randomized Controlled Trial.
    Montalvo-Alonso JJ; Ferragut C; Del Val-Manzano M; Valadés D; Roberts J; Pérez-López A · Nutrients · 2024
    Randomized trial76 participantsFitness forCaffeine
  28. Caffeine attenuates scopolamine-induced memory impairment in humans.
    Riedel W; Hogervorst E; Leboux R; Verhey F; van Praag H; Jolles J · Psychopharmacology · 1996
    Randomized trial16 participantsMental Focus forCaffeine
  29. Effect of caffeine intake on fat oxidation rate during exercise: is there a dose-response effect?
    Gutiérrez-Hellín J; Aguilar-Navarro M; Ruiz-Moreno C; Muñoz A; Varillas-Delgado D; Amaro-Gahete FJ; Del Coso J · European journal of nutrition · 2023
    Randomized trial18 participantsEnergy Metabolism Boost forCaffeine
  30. Cognitive and mood improvements of caffeine in habitual consumers and habitual non-consumers of caffeine.
    Haskell CF; Kennedy DO; Wesnes KA; Scholey AB · Psychopharmacology · 2005
    Randomized trial48 participantsEnergy forCaffeine
  31. Caffeine-containing energy drink improves physical performance of elite rugby players during a simulated match.
    Del Coso J; Ramírez JA; Muñoz G; Portillo J; Gonzalez-Millán C; Muñoz V; Barbero-Álvarez JC; Muñoz-Guerra J · Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme · 2016
    Randomized trial26 participantsEnergy forCaffeine
  32. Performance and alertness effects of caffeine, dextroamphetamine, and modafinil during sleep deprivation.
    Wesensten NJ; Killgore WD; Balkin TJ · Journal of sleep research · 2006
    Randomized trial48 participantsMental Focus forCaffeine
  33. Effects of caffeine on mood and performance: a study of realistic consumption.
    Brice CF; Smith AP · Psychopharmacology · 2003
    Clinical trial24 participantsMental Focus forCaffeine
  34. Effects of caffeine or diphenhydramine on visual vigilance.
    Fine BJ; Kobrick JL; Lieberman HR; Marlowe B; Riley RH; Tharion WJ · Psychopharmacology · 1995
    Randomized trial24 participantsMental Focus forCaffeine
  35. A Randomized Study to Examine the Ability of a Caffeine-Based Energy Drink to Impact Energy Expenditure, Fat Oxidation, and Cognitive Performance.
    Krieger J; Schrautemeier A; Hagele A; Gaige C; Mennemeyer O; Tolbert S; Iannotti J; Kerksick C; Noonan C; Mumford P · Nutrients · 2025
    Randomized trial60 participantsMetabolism Boost forCaffeine
  36. Oolong tea increases metabolic rate and fat oxidation in men.
    Rumpler W; Seale J; Clevidence B; Judd J; Wiley E; Yamamoto S; Komatsu T; Sawaki T; Ishikura Y; Hosoda K · The Journal of nutrition · 2001
    Randomized trial12 participantsMetabolism Boost forCaffeine
  37. Comparison of changes in energy expenditure and body temperatures after caffeine consumption.
    Koot P; Deurenberg P · Annals of nutrition & metabolism · 1995
    Randomized trial12 participantsMetabolism Boost forCaffeine
  38. Caffeine Increases Work Done above Critical Power, but Not Anaerobic Work.
    Silveira R; Andrade-Souza VA; Arcoverde L; Tomazini F; Sansonio A; Bishop DJ; Bertuzzi R; Lima-Silva AE · Medicine and science in sports and exercise · 2018
    Randomized trial9 participantsMetabolism Boost forCaffeine
  39. Effects of Acute Ingestion of Caffeine Capsules on Muscle Strength and Muscle Endurance: A Systematic Review and Meta-Analysis.
    Wu W; Chen Z; Zhou H; Wang L; Li X; Lv Y; Sun T; Yu L · Nutrients · 2024
    Meta-analysis14 studies pooledMuscle Gain forCaffeine
  40. Acute caffeine intake improves muscular strength, power, and endurance performance, reversing the time-of-day effect regardless of muscle activation level in resistance-trained males: a randomized controlled trial.
    Montalvo-Alonso JJ; Del Val-Manzano M; Cerezo-Telléz E; Ferragut C; Valadés D; Rodríguez-Falces J; Pérez-López A · European journal of applied physiology · 2025
    Randomized trial13 participantsMuscle Gain forCaffeine
  41. Wake up and smell the coffee: caffeine supplementation and exercise performance-an umbrella review of 21 published meta-analyses.
    Grgic J; Grgic I; Pickering C; Schoenfeld BJ; Bishop DJ; Pedisic Z · British journal of sports medicine · 2020
    Systematic review21 studies pooledMuscle Gain forCaffeine
  42. Effects of caffeine intake on muscle strength and power: a systematic review and meta-analysis.
    Grgic J; Trexler ET; Lazinica B; Pedisic Z · Journal of the International Society of Sports Nutrition · 2018
    Meta-analysis20 studies pooledMuscle Gain forCaffeine
  43. Caffeine increases strength and power performance in resistance-trained females during early follicular phase.
    Norum M; Risvang LC; Bjørnsen T; Dimitriou L; Rønning PO; Bjørgen M; Raastad T · Scandinavian journal of medicine & science in sports · 2021
    Randomized trial15 participantsMuscle Gain forCaffeine
  44. Effects of caffeine on alertness.
    Zwyghuizen-Doorenbos A; Roehrs TA; Lipschutz L; Timms V; Roth T · Psychopharmacology · 1990
    Randomized trial24 participantsProductivity Boost forCaffeine
  45. Effects of Different Sources of Low-Dose Caffeine on Mood/Arousal and Cognitive Performance.
    Irwin C; McCartney D; Grant G; Delang N; Bartrim K; Cox GR; Desbrow B · Perceptual and motor skills · 2023
    Randomized trial22 participantsProductivity Boost forCaffeine
  46. Effects of caffeine, sleep loss, and stress on cognitive performance and mood during U.S. Navy SEAL training. Sea-Air-Land.
    Lieberman HR; Tharion WJ; Shukitt-Hale B; Speckman KL; Tulley R · Psychopharmacology · 2003
    Randomized trial68 participantsProductivity Boost forCaffeine
  47. A review of caffeine's effects on cognitive, physical and occupational performance.
    McLellan TM; Caldwell JA; Lieberman HR · Neuroscience and biobehavioral reviews · 2017
    Narrative reviewProductivity Boost forCaffeine
  48. Acute caffeine supplementation as a nutrition-based strategy to mitigate sleep-loss-related cognitive and operational performance impairments in military personnel: a systematic review and meta-analysis.
    Wang R; Wang W; Meng L; Hao G; Gu G · Frontiers in nutrition · 2026
    Meta-analysis7 studies pooledProductivity Boost forCaffeine
  49. Changes in caffeine intake and long-term weight change in men and women.
    Lopez-Garcia E; van Dam RM; Rajpathak S; Willett WC; Manson JE; Hu FB · The American journal of clinical nutrition · 2006
    Cohort study58,157 participantsWeight Loss forCaffeine
  50. Does caffeine ingestion before a short-term sprint interval training promote body fat loss?
    Ferreira GA; Felippe LC; Bertuzzi R; Bishop DJ; Ramos IS; De-Oliveira FR; Lima-Silva AE · Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas · 2020
    Randomized trial20 participantsWeight Loss forCaffeine
  51. Eight Weeks of Sprint Interval Training With Adding Caffeine Ingestion Leads to Greater Improvements in Health-Related Physiological Parameters in Obese Male Adults.
    Zhiang J; Song Q · Physiological research · 2026
    Randomized trial30 participantsWeight Loss forCaffeine
  52. Caffeine treatment prevented from weight regain after calorie shifting diet induced weight loss.
    Davoodi SH; Hajimiresmaiel SJ; Ajami M; Mohseni-Bandpei A; Ayatollahi SA; Dowlatshahi K; Javedan G; Pazoki-Toroudi H · Iranian journal of pharmaceutical research : IJPR · 2014
    Non-randomized trial60 participantsWeight Loss forCaffeine
  53. The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials.
    Tabrizi R; Saneei P; Lankarani KB; Akbari M; Kolahdooz F; Esmaillzadeh A; Nadi-Ravandi S; Mazoochi M; Asemi Z · Critical reviews in food science and nutrition · 2020
    Meta-analysis606 participants13 studies pooledWeight Loss forCaffeine