Energy + Focus

• L-Theanine

  200 mg

  Ingredient research · L-Theanine

  L-Theanine is an amino acid found naturally in tea that can promote a calmer mental state without causing marked drowsiness. As a supplement, it may ease perceived stress, support sleep quality, and improve attention when paired with caffeine, although cognitive effects on its own are less consistent.

  • Supports selected stress and anxiety-related measures.

  Top References

  • The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review

• natural Caffeine

  100 mg

  Ingredient research · Caffeine

  Caffeine is a stimulant that blocks adenosine signaling, reducing perceived tiredness and temporarily improving alertness, attention, and reaction time. Supplementation can also enhance endurance and some high-intensity exercise performance, though its effects on sleep and jitteriness make timing and individual sensitivity practically important.

  • Supports alertness, wakefulness, and feelings of energy.
  • Supports response speed on attention, vigilance, and other cognitive tasks.
  • Supports exercise performance across endurance, fatigue resistance, and power-based tasks.

  Top References

  • Caffeine to optimize cognitive function for military mission-readiness: a systematic review and recommendations for the field
  • Feeling smart: Effects of caffeine and glucose on cognition, mood and self-judgment
  • Acute Effects of Caffeine Intake on Psychological Responses and High-Intensity Exercise Performance
  • Gambling When Sleep Deprived: Don't Bet on Stimulants
  • Comparison of effects of modafinil and caffeine on fatigue-vulnerable and fatigue-resistant aircrew after a limited period of sleep deprivation
  • Caffeine supplementation improves the cognitive abilities and shooting performance of elite e-sports players: a crossover trial
  • Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis
  • Wake up and smell the coffee: caffeine supplementation and exercise performance—an umbrella review of 21 published meta-analyses
  • Caffeine Ingestion Attenuates Fatigue-induced Loss of Muscle Torque Complexity

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