Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Combined L-carnosine and L-tyrosine supplementation as an ergogenic strategy for physical and cognitive performance under fatigue in professional football players.
Bilgin S; Bozyılan E; Buzdağlı Y; Karaç Öcal Y; Gürkan O; Toktaş S; İnan H; Egil İ; Yarayan YE · Frontiers in nutrition · 2026
Randomized trial24 participantsflagBrain Health forscienceTyrosine
- Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands--A review.
Jongkees BJ; Hommel B; Kühn S; Colzato LS · Journal of psychiatric research · 2016
Narrative reviewflagBrain Health forscienceTyrosine
- Influence of nutritional tyrosine on cognition and functional connectivity in healthy old humans.
Hensel C; Becker M; Düzel S; Demuth I; Norman K; Steinhagen-Thiessen E; Gallinat J; Lindenberger U; Kühn S · NeuroImage · 2019
Cross-sectional study286 participantsflagBrain Health forscienceTyrosine
- Dietary Tyrosine Intake (FFQ) Is Associated with Locus Coeruleus, Attention and Grey Matter Maintenance: An MRI Structural Study on 398 Healthy Individuals of the Berlin Aging Study-II.
Plini ERG; Melnychuk MC; Harkin A; Dahl MJ; McAuslan M; Kühn S; Boyle RT; Whelan R; Andrews R; Düzel S; Drewelies J; Wagner GG; Lindenberger U; Norman K; Robertson IH; Dockree PM · The journal of nutrition, health & aging · 2023
Cross-sectional study398 participantsflagBrain Health forscienceTyrosine
- Baseline-dependent effect of dopamine's precursor L-tyrosine on working memory gating but not updating.
Jongkees BJ · Cognitive, affective & behavioral neuroscience · 2021
Randomized trial45 participantsflagBrain Health forscienceTyrosine
- 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 participantsflagEnergy forscienceCaffeine
- 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 participantsflagEnergy forscienceCaffeine
- 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 participantsflagEnergy forscienceCaffeine
- 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 participantsflagEnergy forscienceCaffeine
- 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 trialflagEnergy forscienceCaffeine
- 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 pooledflagFitness forscienceCaffeine
- 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 pooledflagFitness forscienceCaffeine
- 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 pooledflagFitness forscienceCaffeine
- 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 participantsflagFitness forscienceCaffeine
- 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 pooledflagFitness forscienceCaffeine
- 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 participantsflagMental Focus forscienceCaffeine
- 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 participantsflagMental Focus forscienceCaffeine
- 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 participantsflagMental Focus forscienceCaffeine
- Effects of caffeine on mood and performance: a study of realistic consumption.
Brice CF; Smith AP · Psychopharmacology · 2003
Clinical trial24 participantsflagMental Focus forscienceCaffeine
- Effects of caffeine or diphenhydramine on visual vigilance.
Fine BJ; Kobrick JL; Lieberman HR; Marlowe B; Riley RH; Tharion WJ · Psychopharmacology · 1995
Randomized trial24 participantsflagMental Focus forscienceCaffeine
- 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 participantsflagMetabolism Boost forscienceCaffeine
- 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 participantsflagMetabolism Boost forscienceCaffeine
- 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 participantsflagMetabolism Boost forscienceCaffeine
- Comparison of changes in energy expenditure and body temperatures after caffeine consumption.
Koot P; Deurenberg P · Annals of nutrition & metabolism · 1995
Randomized trial12 participantsflagMetabolism Boost forscienceCaffeine
- 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 participantsflagMetabolism Boost forscienceCaffeine
- 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 pooledflagMuscle Gain forscienceCaffeine
- 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 participantsflagMuscle Gain forscienceCaffeine
- 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 pooledflagMuscle Gain forscienceCaffeine
- 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 pooledflagMuscle Gain forscienceCaffeine
- 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 participantsflagMuscle Gain forscienceCaffeine
- Effects of caffeine on alertness.
Zwyghuizen-Doorenbos A; Roehrs TA; Lipschutz L; Timms V; Roth T · Psychopharmacology · 1990
Randomized trial24 participantsflagProductivity Boost forscienceCaffeine
- 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 participantsflagProductivity Boost forscienceCaffeine
- 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 participantsflagProductivity Boost forscienceCaffeine
- A review of caffeine's effects on cognitive, physical and occupational performance.
McLellan TM; Caldwell JA; Lieberman HR · Neuroscience and biobehavioral reviews · 2017
Narrative reviewflagProductivity Boost forscienceCaffeine
- 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 pooledflagProductivity Boost forscienceCaffeine
- 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 participantsflagWeight Loss forscienceCaffeine
- 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 participantsflagWeight Loss forscienceCaffeine
- 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 participantsflagWeight Loss forscienceCaffeine
- 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 participantsflagWeight Loss forscienceCaffeine
- 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 pooledflagWeight Loss forscienceCaffeine