Product Image

Bucked Up Pre-Workout 'Merica Rocket Pop

DAS Labs
4.8
★ ★ ★ ★ ★
(33 ratings)
Caffeine 200 mg
Alpha-GPC 200 mg
Product Image
Score66
A capable stimulant pre-workout with a strong citrulline base, but the focus and supporting ingredients are less convincing than the workout core.
How scoring works
Quantity:11 Liquid(s) • (30 servings)
Goals:
Energy
Fitness
Weight Loss
Metabolism Boost
Mental Focus
Productivity Boost
Muscle Gain

Score 66

A capable stimulant pre-workout with a strong citrulline base, but the focus and supporting ingredients are less convincing than the workout core.
How scoring works
$42.95($1.43 per serving)
iHerb
$ 42.95
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Analysis

The formula leads with a meaningful citrulline malate amount and combines it with caffeine for training intensity. Beta-alanine supports repeated high-effort work, although its amount may work best with consistent use rather than occasional servings.

Full dose disclosure is helpful and avoids the uncertainty of a proprietary blend. Alpha-GPC lacks a stated active yield, while taurine and the botanical absorption blends contribute only small amounts.

Experienced stimulant users seeking a conventional pre-workout profile may find the formula effective. People focused mainly on mental performance or stimulant-free training will not get the same value from the blend.

Who is it for
  • Regular caffeine users seeking workout energy
  • Adults who prioritize pump and repeated-effort support
Best for
  • Pre-training stimulation
  • Citrulline-based blood-flow support

Pros

  • Meaningful citrulline malate amount
  • Effective caffeine level
  • Useful beta-alanine inclusion
  • All main amounts are disclosed

Cons

  • Alpha-GPC is modest and lacks active-yield detail
  • Taurine is minimally dosed
  • Several small specialty extracts add complexity
  • Serving cost is relatively high

Warnings

  • Caffeine may cause anxiety, palpitations, or insomnia
  • Beta-alanine may cause temporary tingling
  • Avoid stacking with other stimulant products
  • Deer antler ingredients may be undesirable for tested athletes

Nutrient quality

73 High impact

Meaningful citrulline and caffeine provide a useful pre-workout core. Underdosed supporting actives and several tiny additions reduce formula efficiency.

.

Ingredient transparency

84 Highest impact

All active amounts are visible without a hidden blend. Complete directions, inactive ingredients, and Alpha-GPC active yield remain missing.

.

Customer satisfaction

59 Moderate impact

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

.

Value for money

40 Lower impact

The strong citrulline and caffeine core provides some value. A high serving cost and several low-dose extras make the formula weakly competitive.

.
Report analysis

Goals

Energy
Physical Stamina
Energy
Impact
Highest effect
A+ Goal FitA Strength of SupportA- CoverageB- Formula Quality
Vitamin B12 · 100 mcgCaffeine · 200 mg

Caffeine provides predictable acute alertness, while citrulline malate and beta-alanine support workout performance through separate mechanisms. Alpha-GPC adds a focus-oriented pathway, making the formula broader than a stimulant alone.

The main performance amounts are fully disclosed and several are meaningful, though taurine and vitamin B12 are modest for their respective roles. No theanine or sustained-release caffeine is included, and deer velvet plus small botanical blends add uncertain value.

Study evidence
Caffeine Supportive 68 studies
Fitness
Fitness
Impact
Highest effect
A Goal FitA- Strength of SupportA- CoverageB- Formula Quality
Beta-Alanine · 2000 mgCaffeine · 200 mg

Citrulline malate, beta-alanine, and caffeine directly support blood flow, high-intensity capacity, and training focus. The main doses are clearly disclosed and align reasonably well with common pre-workout use.

Beta-alanine is somewhat below a full daily target, while taurine, Alpha-GPC, and the botanical extras are lightly dosed. The moderate caffeine amount can still cause jitters, sleep disruption, or a faster heart rate in stimulant-sensitive users.

Study evidence
Caffeine Supportive 255 studies
Taurine Supportive 21 studies
Weight Loss
Weight Loss
Impact
Highest effect
A- Goal FitA- Strength of SupportC+ CoverageB Formula Quality
Caffeine · 200 mg

Caffeine may modestly increase energy expenditure and supports training performance during a calorie deficit. Citrulline and beta-alanine support exercise rather than appetite, so the formula does not address satiety or dietary adherence.

Caffeine, citrulline malate, beta-alanine, methylcobalamin, and alpha-GPC have clear amounts and several branded sources. Deer velvet and multiple tiny botanical blends add weakly supported label complexity without improving the main weight-loss mechanisms. Caffeine at 200 mg may cause anxiety, rapid heartbeat, or sleep disruption in sensitive users, especially when combined with other stimulants.

Study evidence
Caffeine Disputed 14 studies
Metabolism Boost
Metabolism Boost
Impact
High effect
A Goal FitA Strength of SupportC- CoverageD+ Formula Quality
Vitamin B12 · 100 mcgCaffeine · 200 mg

Caffeine provides a direct and predictable short-term increase in energy expenditure. The rest of the pre-workout is designed mainly for exercise performance rather than sustained metabolic support.

The clearly stated caffeine amount is well aligned with an effective stimulant serving. Deer antler, low-dose taurine, and several performance additions dilute focus without adding a meaningful metabolic pathway.

Study evidence
Caffeine Disputed 40 studies
Taurine Supportive 11 studies
Mental Focus
Mental Focus
Impact
High effect
B+ Goal FitB Strength of SupportC+ CoverageD+ Formula Quality
Vitamin B12 · 100 mcgAlpha-GPC · 200 mgCaffeine · 200 mg

Caffeine provides a dependable 200 mg acute alertness effect, while AlphaSize Alpha-GPC may add cholinergic support. The listed 200 mg Alpha-GPC material likely provides less active Alpha-GPC than preferred cognitive amounts.

Most of the remaining formula serves exercise performance rather than mental focus. Caffeine can cause jitteriness, anxiety, a faster heartbeat, or sleep disruption, and the absence of L-theanine offers no built-in calming balance.

Study evidence
Alpha-GPC Supportive 1 study
Caffeine Supportive 128 studies
Productivity Boost
Productivity Boost
Impact
High effect
B+ Goal FitB Strength of SupportC CoverageC- Formula Quality
Vitamin B12 · 100 mcgVitamin B12 · 100 mcgAlpha-GPC · 200 mgCaffeine · 200 mg

Caffeine provides reliable acute alertness, while Alpha-GPC adds a relevant but underdosed cholinergic component. The pre-workout format favors exercise performance more than balanced, sustained productivity.

The 200 mg caffeine amount is clearly disclosed and predictable. Estimated active Alpha-GPC remains below the preferred range, and caffeine may cause jitteriness or disrupt sleep in sensitive users.

Study evidence
Alpha-GPC Supportive 2 studies
Caffeine Supportive 108 studies
Muscle Gain
Muscle Gain
Impact
High effect
B Goal FitC+ Strength of SupportB- CoverageC- Formula Quality
Caffeine · 200 mgBeta-Alanine · 2000 mg

Citrulline malate, beta-alanine, and caffeine can support training volume, but the formula lacks protein or a fully dosed anabolic staple. Human evidence supports the main pre-workout ingredients for performance, while deer antler velvet and the small botanical additions lack convincing hypertrophy evidence.

Citrulline is reasonably substantial, while beta-alanine is below a typical full daily amount and several secondary actives are token doses. The core pre-workout combination is logical for training performance. Caffeine may cause jitteriness or disturb sleep in sensitive users.

Study evidence
Alpha-GPC Not classified 1 study
Caffeine Supportive 31 studies
Taurine Not classified

No linked studies yet.

Ingredients

IngredientAmount per serving
Vitamin B12 (Methylcobalamin)
 100 mcg
Citrulline Malate
6000 mg
Beta-Alanine
2000 mg
Caffeine Anhydrous
200 mg
AlphaSize Alpha GPC
200 mg
Taurine
100 mg
Himalayan Rock Salt (Trace Minerals)
 100 mg
Deer Antler Velvet extract
50 mg
AstraGin (Astragalus, Panax notoginseng)
 25 mg
ActiGin (Panax notoginseng, Rosa roxburghii)
 25 mg
Adults 18–50 Women
Report overview
Caffeine · 200 mg OverallScore72
B Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value

A clearly disclosed 200 mg caffeine anhydrous dose provides a predictable, moderate stimulant effect. The formula lacks sustained-release caffeine, while its other performance ingredients do not add a high-potency stimulant. Very high serving cost weakens economic value despite the strong caffeine specification.

View ingredientView products
Alpha-GPC · 200 mg OverallScore50
C+ Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyD- Value

AlphaSize provides a recognized branded form, but the listed 200 mg does not clarify active yield. Assuming 50% yield, the estimated 100 mg active amount falls below the preferred range. The included 200 mg caffeine may cause jitteriness or disrupt sleep in stimulant-sensitive users.

View ingredientView products
Loading alternative details
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Pulse Fruit Punch

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<p>Full pre-workout amounts of citrulline malate, beta-alanine, betaine, theanine, Alpha-GPC, and caffeine create excellent performance depth. Compared with Bucked Up Pre-Workout 'Merica Rocket Pop, the disclosed delivery approach and ingredient profile provide a useful quality-focused alternative, although the noted limitations prevent a definitive advantage for every user.</p>
72 Performance

Seventh Gear Your Mom's Lemonade

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<p>Multiple stimulant forms create strong energy support, while beta-alanine, betaine, creatine, and Alpha-GPC are below common full performance amounts. Compared with Bucked Up Pre-Workout 'Merica Rocket Pop, the disclosed delivery approach and ingredient profile provide a useful quality-focused alternative, although the noted limitations prevent a definitive advantage for every user.</p>
71 Performance

High-Performance Pre-Workout Black Cherry

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<p>Citrulline, amino acids, tyrosine, caffeine, and several performance compounds create broad pre-workout depth with fully listed amounts. Compared with Bucked Up Pre-Workout 'Merica Rocket Pop, the disclosed delivery approach and ingredient profile provide a useful quality-focused alternative, although the noted limitations prevent a definitive advantage for every user.</p>
87 Budget

Caffeine 200 mg

ALLMAX
<p>A clearly disclosed stimulant dose provides reliable short-term energy and focus at a very low serving cost. Its lower recurring cost makes it a more accessible formula option than Bucked Up Pre-Workout 'Merica Rocket Pop, while the stated formula limitations still matter.</p>
82 Budget

High Caffeine 200 mg

Natrol
<p>A clearly disclosed stimulant dose provides reliable short-term energy and focus at a very low serving cost. Its lower recurring cost makes it a more accessible formula option than Bucked Up Pre-Workout 'Merica Rocket Pop, while the stated formula limitations still matter.</p>
82 Budget

Caffeine 200 mg

Best Naturals
<p>A clearly disclosed stimulant dose provides reliable short-term energy and focus at a very low serving cost. Its lower recurring cost makes it a more accessible formula option than Bucked Up Pre-Workout 'Merica Rocket Pop, while the stated formula limitations still matter.</p>
84 Value

L-Theanine & Caffeine

SR Sports Research
<p>A well-balanced theanine and green-coffee caffeine pairing supports calm alertness with clear amounts. Its lower recurring cost and clearly described formula strengths offer a practical quality-to-cost trade-off versus Bucked Up Pre-Workout 'Merica Rocket Pop, with the noted gaps as the main caveat.</p>
84 Value

Smart Caffeine with L-Theanine

NS Natural Stacks
<p>A simple two-to-one theanine-to-green-coffee caffeine pairing provides practical calm-focus dosing. Its lower recurring cost and clearly described formula strengths offer a practical quality-to-cost trade-off versus Bucked Up Pre-Workout 'Merica Rocket Pop, with the noted gaps as the main caveat.</p>
81 Value

Natural Caffeine

BodyTech
<p>A clearly disclosed stimulant dose provides reliable short-term energy and focus at a very low serving cost. Its lower recurring cost and clearly described formula strengths offer a practical quality-to-cost trade-off versus Bucked Up Pre-Workout 'Merica Rocket Pop, with the noted gaps as the main caveat.</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. 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 participantsFitness forCaffeine
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  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. 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
  16. Taurine supplementation enhances anaerobic power in elite speed skaters: A double-blind, randomized, placebo-controlled, crossover study.
    Buzdağlı Y; Eyipınar CD; Öget F; Şıktar E; Forbes SC; Tekin A · Biology of sport · 2023
    Randomized trial30 participantsFitness forTaurine
  17. The effect of acute taurine ingestion on 3-km running performance in trained middle-distance runners.
    Balshaw TG; Bampouras TM; Barry TJ; Sparks SA · Amino acids · 2013
    Randomized trial8 participantsFitness forTaurine
  18. Effects of different doses of taurine supplementation on repeated-sprint performance after exhaustive exercise in a high temperature and humidity environment.
    Cheng X; Lin Y; Li Z · Frontiers in nutrition · 2026
    Randomized trial16 participantsFitness forTaurine
  19. Oral taurine improves critical power and severe-intensity exercise tolerance.
    Waldron M; Patterson SD; Jeffries O · Amino acids · 2020
    Randomized trial12 participantsFitness forTaurine
  20. Acute taurine supplementation enhances thermoregulation and endurance cycling performance in the heat.
    Page LK; Jeffries O; Waldron M · European journal of sport science · 2019
    Randomized trial11 participantsFitness forTaurine
  21. Acute Alpha-Glycerylphosphorylcholine Supplementation Enhances Cognitive Performance in Healthy Men.
    Kerksick CM · Nutrients · 2024
    Randomized trial20 participantsMental Focus Productivity Boost forAlpha-GPC
  22. 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
  23. 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
  24. 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
  25. Effects of caffeine on mood and performance: a study of realistic consumption.
    Brice CF; Smith AP · Psychopharmacology · 2003
    Clinical trial24 participantsMental Focus forCaffeine
  26. 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
  27. 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
  28. 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
  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 participantsMetabolism Boost forCaffeine
  30. 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
  31. 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
  32. Taurine supplementation as a therapeutic strategy for cellular senescence and chronic inflammation in long COVID: a systematic review and meta-analysis.
    Wang K; Ma CH; Khoramjoo M; Kung JY; Oudit GY · BMC infectious diseases · 2026
    Meta-analysis1,030 participants27 studies pooledMetabolism Boost forTaurine
  33. Effect of Long-Term Taurine Supplementation on the Lipid and Glycaemic Profile in Adults with Overweight or Obesity: A Systematic Review and Meta-Analysis.
    Sun Q; Wang J; Wang H; Yu H; Wan K; Ma F; Wang R · Nutrients · 2025
    Meta-analysis9 studies pooledMetabolism Boost forTaurine
  34. The effects of taurine supplementation on obesity, blood pressure and lipid profile: A meta-analysis of randomized controlled trials.
    Guan L; Miao P · European journal of pharmacology · 2021
    Meta-analysis12 studies pooledMetabolism Boost forTaurine
  35. Beneficial effects of taurine on serum lipids in overweight or obese non-diabetic subjects.
    Zhang M; Bi LF; Fang JH; Su XL; Da GL; Kuwamori T; Kagamimori S · Amino acids · 2005
    Randomized trial30 participantsMetabolism Boost forTaurine
  36. Use of skeletal muscle fiber composition to assess relationship between amino acid metabolism and insulin sensitivity.
    Magnusson TE; Blackwood SJ; Tischer D; Strmeň T; Pontén M; Edman S; Horwath O; Apró W; Moberg M; Chorell E; Katz A · European journal of endocrinology · 2025
    Cross-sectional study36 participantsMetabolism Boost forTaurine
  37. The effect of 6 days of alpha glycerylphosphorylcholine on isometric strength
    David Bellar, Nina R LeBlanc, Brian Campbell · Journal of the International Society of Sports Nutrition · 2015
    Randomized trial13 participantsMuscle Gain forAlpha-GPC
  38. 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
  39. 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
  40. 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
  41. 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
  42. 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
  43. Treatment of dementia with neurotransmission modulation.
    Doggrell SA; Evans S · Expert opinion on investigational drugs · 2004
    Narrative reviewProductivity Boost forAlpha-GPC
  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