References - Trusted Sources for Quality Supplements


  1. β-alanine supplementation to improve exercise capacity and performance: a systematic review and meta-analysis | British Journal of Sports Medicine
  2. Effects of beta-alanine supplementation on performance and muscle fatigue in athletes and non-athletes of different sports: a systematic review. - PubMed - NCBI
  3. International society of sports nutrition position stand: Beta-Alanine. - PubMed - NCBI
  4. Additive Benefits of -Alanine Supplementation and Sprint-Interval Training
  5. The effects of muscular exercise on glucose, free fatty acids, alanine and lactate in type I diabetic subjects in relation to metabolic control - Springer
  6. β-Alanine Supplementation Improves Throwing Velocities in Repeated Sprint Ability and 200-m Swimming Performance in Young Water Polo Players
  7. Effects of 28-Day Beta-Alanine Supplementation on Isokinetic Exercise Performance and Body Composition in Female Masters Athletes
  8. Improving beta-alanine supplementation strategy to enhance exercise performance in athletes
  9. Beta-alanine supplementation enhances judo-related performance in highly-trained athletes
  10. Twenty-four Weeks β-alanine Supplementation on Carnosine Content, Related Genes, and Exercise



  • Efficacy of acute caffeine ingestion for short-term high-intensity exercise performance: a systematic review
  • Effect of caffeine on sport-specific endurance performance: a systematic review

Performance and sports

  1. International society of sports nutrition position stand: caffeine and performance. - PubMed - NCBI
  2. The effects of a pre-workout supplement containing caffeine, creatine, and amino acids during three weeks of high-intensity exercise on aerobic and... - PubMed - NCBI
  3. Caffeine and anaerobic performance: ergogenic value and mechanisms of action. - PubMed - NCBI
  4. Caffeine use in sports. A pharmacological review. - PubMed - NCBI
  5. Acute effects of caffeine-containing energy drinks on physical performance: a systematic review and meta-analysis. - PubMed - NCBI
  6. Performance outcomes and unwanted side effects associated with energy drinks. - PubMed - NCBI (caffeine)
  7. Exercise and sport performance with low doses of caffeine. - PubMed - NCBI
  8. Performance effects and metabolic consequences of caffeine and caffeinated energy drink consumption on glucose disposal. - PubMed - NCBI
  9. The acute effect of caffeine supplementation on strength, repetition sustainability and work volume of novice bodybuilders
  10. The effect of caffeine on skeletal muscle anabolic signaling and hypertrophy. - Applied Physiology, Nutrition, and Metabolism
  11. Coffee and Caffeine Ingestion Have Little Effect on Repeated Sprint Cycling in Relatively Untrained Males
  12. Effects of coffee and caffeine anhydrous on strength and sprint performance. - PubMed - NCBI
  13. Impact of Caffeine and Protein on Postexercise Muscle Glycogen Synthesis
  14. Effect of a moderate caffeine dose on endurance cycle performance and thermoregulation during prolonged exercise in the heat

Long-term effects, tolerance and withdrawal

  1. Chronic ingestion of a low dose of caffeine induces tolerance to the performance benefits of caffeine. - PubMed - NCBI
  2. Caffeine tolerance and choice in humans. - PubMed - NCBI
  3. Caffeine Tolerance is Incomplete: Persistent Blood Pressure Responses in the Ambulatory Setting
  4. A critical review of caffeine withdrawal: empirical validation of symptoms and signs, incidence, severity, and associated features | SpringerLink
  5. The Cumulative Neurobehavioral and Physiological Effects of Chronic Caffeine Intake: Individual Differences and Implications for the Use of Caffeinated Energy Products
  6. Caffeine Use Disorder: A Comprehensive Review and Research Agenda

Cognitive function

  1. A Comparison of Blue Light and Caffeine Effects on Cognitive Function and Alertness in Humans
  2. Effects of caffeine and glucose, alone and combined, on cognitive performance. - PubMed - NCBI
  3. Effects of two doses of glucose and a caffeine-glucose combination on cognitive performance and mood during multi-tasking. - PubMed - NCBI


  1. Effects of caffeine on the human circadian clock in vivo and in vitro

Energy expenditure

  1. Effect of acute caffeine ingestion on EPOC after intense resistance training. - PubMed - NCBI


  • Dispelling the myth that habitual caffeine consumption influences the performance response to acute caffeine supplementation



  • Analysis of the efficacy, safety, and regulatory status of novel forms of creatine | SpringerLink
  • Creatine: a review of efficacy and safety. - Abstract - Europe PMC
  • Effect of creatine supplementation and drop-set resistance training in untrained aging adults. - PubMed - NCBI
  • Does oral creatine supplementation improve strength? A meta-analysis. (Original Research)


  1. Arginine and citrulline supplementation in sports and exercise: ergogenic nutrients? - PubMed - NCBI
  2. Citrulline/malate promotes aerobic energy production in human exercising muscle. - PubMed - NCBI
  3. Effects of supplemental citrulline malate ingestion during repeated bouts of lower-body exercise in advanced weightlifters. - PubMed - NCBI